gmqcc/parser.c

/*
 * Copyright (C) 2012, 2013
 *     Wolfgang Bumiller
 *     Dale Weiler
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is furnished to do
 * so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
#include <string.h>
#include <math.h>

#include "gmqcc.h"
#include "lexer.h"
#include "ast.h"

/* beginning of locals */
#define PARSER_HT_LOCALS  2

#define PARSER_HT_SIZE    128
#define TYPEDEF_HT_SIZE   16

typedef struct parser_s {
    lex_file *lex;
    int      tok;

    bool     ast_cleaned;

    ast_expression **globals;
    ast_expression **fields;
    ast_function **functions;
    ast_value    **imm_float;
    ast_value    **imm_string;
    ast_value    **imm_vector;
    size_t         translated;

    ht ht_imm_string;

    /* must be deleted first, they reference immediates and values */
    ast_value    **accessors;

    ast_value *imm_float_zero;
    ast_value *imm_float_one;
    ast_value *imm_float_neg_one;

    ast_value *imm_vector_zero;

    ast_value *nil;
    ast_value *reserved_version;

    size_t crc_globals;
    size_t crc_fields;

    ast_function *function;
    ht            aliases;

    /* All the labels the function defined...
     * Should they be in ast_function instead?
     */
    ast_label  **labels;
    ast_goto   **gotos;
    const char **breaks;
    const char **continues;

    /* A list of hashtables for each scope */
    ht *variables;
    ht htfields;
    ht htglobals;
    ht *typedefs;

    /* same as above but for the spelling corrector */
    correct_trie_t  **correct_variables;
    size_t         ***correct_variables_score;  /* vector of vector of size_t* */

    /* not to be used directly, we use the hash table */
    ast_expression **_locals;
    size_t          *_blocklocals;
    ast_value      **_typedefs;
    size_t          *_blocktypedefs;
    lex_ctx         *_block_ctx;

    /* we store the '=' operator info */
    const oper_info *assign_op;

    /* magic values */
    ast_value *const_vec[3];

    /* pragma flags */
    bool noref;

    /* collected information */
    size_t     max_param_count;

    /* code generator */
    code_t     *code;
} parser_t;

static ast_expression * const intrinsic_debug_typestring = (ast_expression*)0x1;

static void parser_enterblock(parser_t *parser);
static bool parser_leaveblock(parser_t *parser);
static void parser_addlocal(parser_t *parser, const char *name, ast_expression *e);
static void parser_addglobal(parser_t *parser, const char *name, ast_expression *e);
static bool parse_typedef(parser_t *parser);
static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofields, int qualifier, ast_value *cached_typedef, bool noref, bool is_static, uint32_t qflags, char *vstring);
static ast_block* parse_block(parser_t *parser);
static bool parse_block_into(parser_t *parser, ast_block *block);
static bool parse_statement_or_block(parser_t *parser, ast_expression **out);
static bool parse_statement(parser_t *parser, ast_block *block, ast_expression **out, bool allow_cases);
static ast_expression* parse_expression_leave(parser_t *parser, bool stopatcomma, bool truthvalue, bool with_labels);
static ast_expression* parse_expression(parser_t *parser, bool stopatcomma, bool with_labels);
static ast_value* parser_create_array_setter_proto(parser_t *parser, ast_value *array, const char *funcname);
static ast_value* parser_create_array_getter_proto(parser_t *parser, ast_value *array, const ast_expression *elemtype, const char *funcname);
static ast_value *parse_typename(parser_t *parser, ast_value **storebase, ast_value *cached_typedef);

static void parseerror(parser_t *parser, const char *fmt, ...)
{
    va_list ap;
    va_start(ap, fmt);
    vcompile_error(parser->lex->tok.ctx, fmt, ap);
    va_end(ap);
}

/* returns true if it counts as an error */
static bool GMQCC_WARN parsewarning(parser_t *parser, int warntype, const char *fmt, ...)
{
    bool    r;
    va_list ap;
    va_start(ap, fmt);
    r = vcompile_warning(parser->lex->tok.ctx, warntype, fmt, ap);
    va_end(ap);
    return r;
}

/**********************************************************************
 * some maths used for constant folding
 */

vector vec3_add(vector a, vector b)
{
    vector out;
    out.x = a.x + b.x;
    out.y = a.y + b.y;
    out.z = a.z + b.z;
    return out;
}

vector vec3_sub(vector a, vector b)
{
    vector out;
    out.x = a.x - b.x;
    out.y = a.y - b.y;
    out.z = a.z - b.z;
    return out;
}

qcfloat vec3_mulvv(vector a, vector b)
{
    return (a.x * b.x + a.y * b.y + a.z * b.z);
}

vector vec3_mulvf(vector a, float b)
{
    vector out;
    out.x = a.x * b;
    out.y = a.y * b;
    out.z = a.z * b;
    return out;
}

/**********************************************************************
 * parsing
 */

static bool parser_next(parser_t *parser)
{
    /* lex_do kills the previous token */
    parser->tok = lex_do(parser->lex);
    if (parser->tok == TOKEN_EOF)
        return true;
    if (parser->tok >= TOKEN_ERROR) {
        parseerror(parser, "lex error");
        return false;
    }
    return true;
}

#define parser_tokval(p) ((p)->lex->tok.value)
#define parser_token(p)  (&((p)->lex->tok))
#define parser_ctx(p)    ((p)->lex->tok.ctx)

static ast_value* parser_const_float(parser_t *parser, double d)
{
    size_t i;
    ast_value *out;
    lex_ctx ctx;
    for (i = 0; i < vec_size(parser->imm_float); ++i) {
        const double compare = parser->imm_float[i]->constval.vfloat;
        if (memcmp((const void*)&compare, (const void *)&d, sizeof(double)) == 0)
            return parser->imm_float[i];
    }
    if (parser->lex)
        ctx = parser_ctx(parser);
    else {
        memset(&ctx, 0, sizeof(ctx));
    }
    out = ast_value_new(ctx, "#IMMEDIATE", TYPE_FLOAT);
    out->cvq      = CV_CONST;
    out->hasvalue = true;
    out->isimm    = true;
    out->constval.vfloat = d;
    vec_push(parser->imm_float, out);
    return out;
}

static ast_value* parser_const_float_0(parser_t *parser)
{
    if (!parser->imm_float_zero)
        parser->imm_float_zero = parser_const_float(parser, 0);
    return parser->imm_float_zero;
}

static ast_value* parser_const_float_neg1(parser_t *parser) {
    if (!parser->imm_float_neg_one)
        parser->imm_float_neg_one = parser_const_float(parser, -1);
    return parser->imm_float_neg_one;
}

static ast_value* parser_const_float_1(parser_t *parser)
{
    if (!parser->imm_float_one)
        parser->imm_float_one = parser_const_float(parser, 1);
    return parser->imm_float_one;
}

static char *parser_strdup(const char *str)
{
    if (str && !*str) {
        /* actually dup empty strings */
        char *out = (char*)mem_a(1);
        *out = 0;
        return out;
    }
    return util_strdup(str);
}

static ast_value* parser_const_string(parser_t *parser, const char *str, bool dotranslate)
{
    size_t hash = util_hthash(parser->ht_imm_string, str);
    ast_value *out;
    if ( (out = (ast_value*)util_htgeth(parser->ht_imm_string, str, hash)) ) {
        if (dotranslate && out->name[0] == '#') {
            char name[32];
            util_snprintf(name, sizeof(name), "dotranslate_%lu", (unsigned long)(parser->translated++));
            ast_value_set_name(out, name);
            out->expression.flags |= AST_FLAG_INCLUDE_DEF;
        }
        return out;
    }
    /*
    for (i = 0; i < vec_size(parser->imm_string); ++i) {
        if (!strcmp(parser->imm_string[i]->constval.vstring, str))
            return parser->imm_string[i];
    }
    */
    if (dotranslate) {
        char name[32];
        util_snprintf(name, sizeof(name), "dotranslate_%lu", (unsigned long)(parser->translated++));
        out = ast_value_new(parser_ctx(parser), name, TYPE_STRING);
        out->expression.flags |= AST_FLAG_INCLUDE_DEF;
    } else
        out = ast_value_new(parser_ctx(parser), "#IMMEDIATE", TYPE_STRING);
    out->cvq      = CV_CONST;
    out->hasvalue = true;
    out->isimm    = true;
    out->constval.vstring = parser_strdup(str);
    vec_push(parser->imm_string, out);
    util_htseth(parser->ht_imm_string, str, hash, out);
    return out;
}

static ast_value* parser_const_vector(parser_t *parser, vector v)
{
    size_t i;
    ast_value *out;
    for (i = 0; i < vec_size(parser->imm_vector); ++i) {
        if (!memcmp(&parser->imm_vector[i]->constval.vvec, &v, sizeof(v)))
            return parser->imm_vector[i];
    }
    out = ast_value_new(parser_ctx(parser), "#IMMEDIATE", TYPE_VECTOR);
    out->cvq      = CV_CONST;
    out->hasvalue = true;
    out->isimm    = true;
    out->constval.vvec = v;
    vec_push(parser->imm_vector, out);
    return out;
}

static ast_value* parser_const_vector_f(parser_t *parser, float x, float y, float z)
{
    vector v;
    v.x = x;
    v.y = y;
    v.z = z;
    return parser_const_vector(parser, v);
}

static ast_value* parser_const_vector_0(parser_t *parser)
{
    if (!parser->imm_vector_zero)
        parser->imm_vector_zero = parser_const_vector_f(parser, 0, 0, 0);
    return parser->imm_vector_zero;
}

static ast_expression* parser_find_field(parser_t *parser, const char *name)
{
    return ( ast_expression*)util_htget(parser->htfields, name);
}

static ast_expression* parser_find_label(parser_t *parser, const char *name)
{
    size_t i;
    for(i = 0; i < vec_size(parser->labels); i++)
        if (!strcmp(parser->labels[i]->name, name))
            return (ast_expression*)parser->labels[i];
    return NULL;
}

static ast_expression* parser_find_global(parser_t *parser, const char *name)
{
    ast_expression *var = (ast_expression*)util_htget(parser->aliases, parser_tokval(parser));
    if (var)
        return var;
    return (ast_expression*)util_htget(parser->htglobals, name);
}

static ast_expression* parser_find_param(parser_t *parser, const char *name)
{
    size_t i;
    ast_value *fun;
    if (!parser->function)
        return NULL;
    fun = parser->function->vtype;
    for (i = 0; i < vec_size(fun->expression.params); ++i) {
        if (!strcmp(fun->expression.params[i]->name, name))
            return (ast_expression*)(fun->expression.params[i]);
    }
    return NULL;
}

static ast_expression* parser_find_local(parser_t *parser, const char *name, size_t upto, bool *isparam)
{
    size_t          i, hash;
    ast_expression *e;

    hash = util_hthash(parser->htglobals, name);

    *isparam = false;
    for (i = vec_size(parser->variables); i > upto;) {
        --i;
        if ( (e = (ast_expression*)util_htgeth(parser->variables[i], name, hash)) )
            return e;
    }
    *isparam = true;
    return parser_find_param(parser, name);
}

static ast_expression* parser_find_var(parser_t *parser, const char *name)
{
    bool dummy;
    ast_expression *v;
    v         = parser_find_local(parser, name, 0, &dummy);
    if (!v) v = parser_find_global(parser, name);
    return v;
}

static ast_value* parser_find_typedef(parser_t *parser, const char *name, size_t upto)
{
    size_t     i, hash;
    ast_value *e;
    hash = util_hthash(parser->typedefs[0], name);

    for (i = vec_size(parser->typedefs); i > upto;) {
        --i;
        if ( (e = (ast_value*)util_htgeth(parser->typedefs[i], name, hash)) )
            return e;
    }
    return NULL;
}

/* include intrinsics */
#include "intrin.h"

typedef struct
{
    size_t etype; /* 0 = expression, others are operators */
    bool            isparen;
    size_t          off;
    ast_expression *out;
    ast_block      *block; /* for commas and function calls */
    lex_ctx ctx;
} sy_elem;

enum {
    PAREN_EXPR,
    PAREN_FUNC,
    PAREN_INDEX,
    PAREN_TERNARY1,
    PAREN_TERNARY2
};
typedef struct
{
    sy_elem        *out;
    sy_elem        *ops;
    size_t         *argc;
    unsigned int   *paren;
} shunt;

static sy_elem syexp(lex_ctx ctx, ast_expression *v) {
    sy_elem e;
    e.etype = 0;
    e.off   = 0;
    e.out   = v;
    e.block = NULL;
    e.ctx   = ctx;
    e.isparen = false;
    return e;
}

static sy_elem syblock(lex_ctx ctx, ast_block *v) {
    sy_elem e;
    e.etype = 0;
    e.off   = 0;
    e.out   = (ast_expression*)v;
    e.block = v;
    e.ctx   = ctx;
    e.isparen = false;
    return e;
}

static sy_elem syop(lex_ctx ctx, const oper_info *op) {
    sy_elem e;
    e.etype = 1 + (op - operators);
    e.off   = 0;
    e.out   = NULL;
    e.block = NULL;
    e.ctx   = ctx;
    e.isparen = false;
    return e;
}

static sy_elem syparen(lex_ctx ctx, size_t off) {
    sy_elem e;
    e.etype = 0;
    e.off   = off;
    e.out   = NULL;
    e.block = NULL;
    e.ctx   = ctx;
    e.isparen = true;
    return e;
}

/* With regular precedence rules, ent.foo[n] is the same as (ent.foo)[n],
 * so we need to rotate it to become ent.(foo[n]).
 */
static bool rotate_entfield_array_index_nodes(ast_expression **out)
{
    ast_array_index *index, *oldindex;
    ast_entfield    *entfield;

    ast_value       *field;
    ast_expression  *sub;
    ast_expression  *entity;

    lex_ctx ctx = ast_ctx(*out);

    if (!ast_istype(*out, ast_array_index))
        return false;
    index = (ast_array_index*)*out;

    if (!ast_istype(index->array, ast_entfield))
        return false;
    entfield = (ast_entfield*)index->array;

    if (!ast_istype(entfield->field, ast_value))
        return false;
    field = (ast_value*)entfield->field;

    sub    = index->index;
    entity = entfield->entity;

    oldindex = index;

    index = ast_array_index_new(ctx, (ast_expression*)field, sub);
    entfield = ast_entfield_new(ctx, entity, (ast_expression*)index);
    *out = (ast_expression*)entfield;

    oldindex->array = NULL;
    oldindex->index = NULL;
    ast_delete(oldindex);

    return true;
}

static bool immediate_is_true(lex_ctx ctx, ast_value *v)
{
    switch (v->expression.vtype) {
        case TYPE_FLOAT:
            return !!v->constval.vfloat;
        case TYPE_INTEGER:
            return !!v->constval.vint;
        case TYPE_VECTOR:
            if (OPTS_FLAG(CORRECT_LOGIC))
                return v->constval.vvec.x &&
                       v->constval.vvec.y &&
                       v->constval.vvec.z;
            else
                return !!(v->constval.vvec.x);
        case TYPE_STRING:
            if (!v->constval.vstring)
                return false;
            if (v->constval.vstring && OPTS_FLAG(TRUE_EMPTY_STRINGS))
                return true;
            return !!v->constval.vstring[0];
        default:
            compile_error(ctx, "internal error: immediate_is_true on invalid type");
            return !!v->constval.vfunc;
    }
}

static bool parser_sy_apply_operator(parser_t *parser, shunt *sy)
{
    const oper_info *op;
    lex_ctx ctx;
    ast_expression *out = NULL;
    ast_expression *exprs[3];
    ast_block      *blocks[3];
    ast_value      *asvalue[3];
    ast_binstore   *asbinstore;
    size_t i, assignop, addop, subop;
    qcint  generated_op = 0;

    char ty1[1024];
    char ty2[1024];

    if (!vec_size(sy->ops)) {
        parseerror(parser, "internal error: missing operator");
        return false;
    }

    if (vec_last(sy->ops).isparen) {
        parseerror(parser, "unmatched parenthesis");
        return false;
    }

    op = &operators[vec_last(sy->ops).etype - 1];
    ctx = vec_last(sy->ops).ctx;

    if (vec_size(sy->out) < op->operands) {
        compile_error(ctx, "internal error: not enough operands: %i (operator %s (%i))", vec_size(sy->out),
                      op->op, (int)op->id);
        return false;
    }

    vec_shrinkby(sy->ops, 1);

    /* op(:?) has no input and no output */
    if (!op->operands)
        return true;

    vec_shrinkby(sy->out, op->operands);
    for (i = 0; i < op->operands; ++i) {
        exprs[i]  = sy->out[vec_size(sy->out)+i].out;
        blocks[i] = sy->out[vec_size(sy->out)+i].block;
        asvalue[i] = (ast_value*)exprs[i];

        if (exprs[i]->vtype == TYPE_NOEXPR &&
            !(i != 0 && op->id == opid2('?',':')) &&
            !(i == 1 && op->id == opid1('.')))
        {
            if (ast_istype(exprs[i], ast_label))
                compile_error(ast_ctx(exprs[i]), "expected expression, got an unknown identifier");
            else
                compile_error(ast_ctx(exprs[i]), "not an expression");
            (void)!compile_warning(ast_ctx(exprs[i]), WARN_DEBUG, "expression %u\n", (unsigned int)i);
        }
    }

    if (blocks[0] && !vec_size(blocks[0]->exprs) && op->id != opid1(',')) {
        compile_error(ctx, "internal error: operator cannot be applied on empty blocks");
        return false;
    }

#define NotSameType(T) \
             (exprs[0]->vtype != exprs[1]->vtype || \
              exprs[0]->vtype != T)
#define CanConstFold1(A) \
             (ast_istype((A), ast_value) && ((ast_value*)(A))->hasvalue && (((ast_value*)(A))->cvq == CV_CONST) &&\
              (A)->vtype != TYPE_FUNCTION)
#define CanConstFold(A, B) \
             (CanConstFold1(A) && CanConstFold1(B))
#define ConstV(i) (asvalue[(i)]->constval.vvec)
#define ConstF(i) (asvalue[(i)]->constval.vfloat)
#define ConstS(i) (asvalue[(i)]->constval.vstring)
    switch (op->id)
    {
        default:
            compile_error(ctx, "internal error: unhandled operator: %s (%i)", op->op, (int)op->id);
            return false;

        case opid1('.'):
            if (exprs[0]->vtype == TYPE_VECTOR &&
                exprs[1]->vtype == TYPE_NOEXPR)
            {
                if      (exprs[1] == (ast_expression*)parser->const_vec[0])
                    out = (ast_expression*)ast_member_new(ctx, exprs[0], 0, NULL);
                else if (exprs[1] == (ast_expression*)parser->const_vec[1])
                    out = (ast_expression*)ast_member_new(ctx, exprs[0], 1, NULL);
                else if (exprs[1] == (ast_expression*)parser->const_vec[2])
                    out = (ast_expression*)ast_member_new(ctx, exprs[0], 2, NULL);
                else {
                    compile_error(ctx, "access to invalid vector component");
                    return false;
                }
            }
            else if (exprs[0]->vtype == TYPE_ENTITY) {
                if (exprs[1]->vtype != TYPE_FIELD) {
                    compile_error(ast_ctx(exprs[1]), "type error: right hand of member-operand should be an entity-field");
                    return false;
                }
                out = (ast_expression*)ast_entfield_new(ctx, exprs[0], exprs[1]);
            }
            else if (exprs[0]->vtype == TYPE_VECTOR) {
                compile_error(ast_ctx(exprs[1]), "vectors cannot be accessed this way");
                return false;
            }
            else {
                compile_error(ast_ctx(exprs[1]), "type error: member-of operator on something that is not an entity or vector");
                return false;
            }
            break;

        case opid1('['):
            if (exprs[0]->vtype != TYPE_ARRAY &&
                !(exprs[0]->vtype == TYPE_FIELD &&
                  exprs[0]->next->vtype == TYPE_ARRAY))
            {
                ast_type_to_string(exprs[0], ty1, sizeof(ty1));
                compile_error(ast_ctx(exprs[0]), "cannot index value of type %s", ty1);
                return false;
            }
            if (exprs[1]->vtype != TYPE_FLOAT) {
                ast_type_to_string(exprs[0], ty1, sizeof(ty1));
                compile_error(ast_ctx(exprs[1]), "index must be of type float, not %s", ty1);
                return false;
            }
            out = (ast_expression*)ast_array_index_new(ctx, exprs[0], exprs[1]);
            if (rotate_entfield_array_index_nodes(&out))
            {
#if 0
                /* This is not broken in fteqcc anymore */
                if (OPTS_OPTION_U32(OPTION_STANDARD) != COMPILER_GMQCC) {
                    /* this error doesn't need to make us bail out */
                    (void)!parsewarning(parser, WARN_EXTENSIONS,
                                        "accessing array-field members of an entity without parenthesis\n"
                                        " -> this is an extension from -std=gmqcc");
                }
#endif
            }
            break;

        case opid1(','):
            if (vec_size(sy->paren) && vec_last(sy->paren) == PAREN_FUNC) {
                vec_push(sy->out, syexp(ctx, exprs[0]));
                vec_push(sy->out, syexp(ctx, exprs[1]));
                vec_last(sy->argc)++;
                return true;
            }
            if (blocks[0]) {
                if (!ast_block_add_expr(blocks[0], exprs[1]))
                    return false;
            } else {
                blocks[0] = ast_block_new(ctx);
                if (!ast_block_add_expr(blocks[0], exprs[0]) ||
                    !ast_block_add_expr(blocks[0], exprs[1]))
                {
                    return false;
                }
            }
            ast_block_set_type(blocks[0], exprs[1]);

            vec_push(sy->out, syblock(ctx, blocks[0]));
            return true;

        case opid2('+','P'):
            out = exprs[0];
            break;
        case opid2('-','P'):
            switch (exprs[0]->vtype) {
                case TYPE_FLOAT:
                    if (CanConstFold1(exprs[0]))
                        out = (ast_expression*)parser_const_float(parser, -ConstF(0));
                    else
                        out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_F,
                                                              (ast_expression*)parser_const_float_0(parser),
                                                              exprs[0]);
                    break;
                case TYPE_VECTOR:
                    if (CanConstFold1(exprs[0]))
                        out = (ast_expression*)parser_const_vector_f(parser,
                            -ConstV(0).x, -ConstV(0).y, -ConstV(0).z);
                    else
                        out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_V,
                                                              (ast_expression*)parser_const_vector_0(parser),
                                                              exprs[0]);
                    break;
                default:
                compile_error(ctx, "invalid types used in expression: cannot negate type %s",
                              type_name[exprs[0]->vtype]);
                return false;
            }
            break;

        case opid2('!','P'):
            switch (exprs[0]->vtype) {
                case TYPE_FLOAT:
                    if (CanConstFold1(exprs[0]))
                        out = (ast_expression*)parser_const_float(parser, !ConstF(0));
                    else
                        out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_F, exprs[0]);
                    break;
                case TYPE_VECTOR:
                    if (CanConstFold1(exprs[0]))
                        out = (ast_expression*)parser_const_float(parser,
                            (!ConstV(0).x && !ConstV(0).y && !ConstV(0).z));
                    else
                        out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_V, exprs[0]);
                    break;
                case TYPE_STRING:
                    if (CanConstFold1(exprs[0])) {
                        if (OPTS_FLAG(TRUE_EMPTY_STRINGS))
                            out = (ast_expression*)parser_const_float(parser, !ConstS(0));
                        else
                            out = (ast_expression*)parser_const_float(parser, !ConstS(0) || !*ConstS(0));
                    } else {
                        if (OPTS_FLAG(TRUE_EMPTY_STRINGS))
                            out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_F, exprs[0]);
                        else
                            out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_S, exprs[0]);
                    }
                    break;
                /* we don't constant-fold NOT for these types */
                case TYPE_ENTITY:
                    out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_ENT, exprs[0]);
                    break;
                case TYPE_FUNCTION:
                    out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_FNC, exprs[0]);
                    break;
                default:
                compile_error(ctx, "invalid types used in expression: cannot logically negate type %s",
                              type_name[exprs[0]->vtype]);
                return false;
            }
            break;

        case opid1('+'):
            if (exprs[0]->vtype != exprs[1]->vtype ||
                (exprs[0]->vtype != TYPE_VECTOR && exprs[0]->vtype != TYPE_FLOAT) )
            {
                compile_error(ctx, "invalid types used in expression: cannot add type %s and %s",
                              type_name[exprs[0]->vtype],
                              type_name[exprs[1]->vtype]);
                return false;
            }
            switch (exprs[0]->vtype) {
                case TYPE_FLOAT:
                    if (CanConstFold(exprs[0], exprs[1]))
                    {
                        out = (ast_expression*)parser_const_float(parser, ConstF(0) + ConstF(1));
                    }
                    else
                        out = (ast_expression*)ast_binary_new(ctx, INSTR_ADD_F, exprs[0], exprs[1]);
                    break;
                case TYPE_VECTOR:
                    if (CanConstFold(exprs[0], exprs[1]))
                        out = (ast_expression*)parser_const_vector(parser, vec3_add(ConstV(0), ConstV(1)));
                    else
                        out = (ast_expression*)ast_binary_new(ctx, INSTR_ADD_V, exprs[0], exprs[1]);
                    break;
                default:
                    compile_error(ctx, "invalid types used in expression: cannot add type %s and %s",
                                  type_name[exprs[0]->vtype],
                                  type_name[exprs[1]->vtype]);
                    return false;
            };
            break;
        case opid1('-'):
            if (exprs[0]->vtype != exprs[1]->vtype ||
                (exprs[0]->vtype != TYPE_VECTOR && exprs[0]->vtype != TYPE_FLOAT) )
            {
                compile_error(ctx, "invalid types used in expression: cannot subtract type %s from %s",
                              type_name[exprs[1]->vtype],
                              type_name[exprs[0]->vtype]);
                return false;
            }
            switch (exprs[0]->vtype) {
                case TYPE_FLOAT:
                    if (CanConstFold(exprs[0], exprs[1]))
                        out = (ast_expression*)parser_const_float(parser, ConstF(0) - ConstF(1));
                    else
                        out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_F, exprs[0], exprs[1]);
                    break;
                case TYPE_VECTOR:
                    if (CanConstFold(exprs[0], exprs[1]))
                        out = (ast_expression*)parser_const_vector(parser, vec3_sub(ConstV(0), ConstV(1)));
                    else
                        out = (ast_expression*)ast_binary_new(ctx, INSTR_SUB_V, exprs[0], exprs[1]);
                    break;
                default:
                    compile_error(ctx, "invalid types used in expression: cannot subtract type %s from %s",
                                  type_name[exprs[1]->vtype],
                                  type_name[exprs[0]->vtype]);
                    return false;
            };
            break;
        case opid1('*'):
            if (exprs[0]->vtype != exprs[1]->vtype &&
                !(exprs[0]->vtype == TYPE_VECTOR &&
                  exprs[1]->vtype == TYPE_FLOAT) &&
                !(exprs[1]->vtype == TYPE_VECTOR &&
                  exprs[0]->vtype == TYPE_FLOAT)
                )
            {
                compile_error(ctx, "invalid types used in expression: cannot multiply types %s and %s",
                              type_name[exprs[1]->vtype],
                              type_name[exprs[0]->vtype]);
                return false;
            }
            switch (exprs[0]->vtype) {
                case TYPE_FLOAT:
                    if (exprs[1]->vtype == TYPE_VECTOR)
                    {
                        if (CanConstFold(exprs[0], exprs[1]))
                            out = (ast_expression*)parser_const_vector(parser, vec3_mulvf(ConstV(1), ConstF(0)));
                        else
                            out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_FV, exprs[0], exprs[1]);
                    }
                    else
                    {
                        if (CanConstFold(exprs[0], exprs[1]))
                            out = (ast_expression*)parser_const_float(parser, ConstF(0) * ConstF(1));
                        else
                            out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_F, exprs[0], exprs[1]);
                    }
                    break;
                case TYPE_VECTOR:
                    if (exprs[1]->vtype == TYPE_FLOAT)
                    {
                        if (CanConstFold(exprs[0], exprs[1]))
                            out = (ast_expression*)parser_const_vector(parser, vec3_mulvf(ConstV(0), ConstF(1)));
                        else
                            out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_VF, exprs[0], exprs[1]);
                    }
                    else
                    {
                        if (CanConstFold(exprs[0], exprs[1]))
                            out = (ast_expression*)parser_const_float(parser, vec3_mulvv(ConstV(0), ConstV(1)));
                        else if (OPTS_OPTIMIZATION(OPTIM_VECTOR_COMPONENTS) && CanConstFold1(exprs[0])) {
                            vector vec = ConstV(0);
                            if (!vec.y && !vec.z) { /* 'n 0 0' * v */
                                ++opts_optimizationcount[OPTIM_VECTOR_COMPONENTS];
                                out = (ast_expression*)ast_member_new(ctx, exprs[1], 0, NULL);
                                out->node.keep = false;
                                ((ast_member*)out)->rvalue = true;
                                if (vec.x != 1)
                                    out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_F, (ast_expression*)parser_const_float(parser, vec.x), out);
                            }
                            else if (!vec.x && !vec.z) { /* '0 n 0' * v */
                                ++opts_optimizationcount[OPTIM_VECTOR_COMPONENTS];
                                out = (ast_expression*)ast_member_new(ctx, exprs[1], 1, NULL);
                                out->node.keep = false;
                                ((ast_member*)out)->rvalue = true;
                                if (vec.y != 1)
                                    out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_F, (ast_expression*)parser_const_float(parser, vec.y), out);
                            }
                            else if (!vec.x && !vec.y) { /* '0 n 0' * v */
                                ++opts_optimizationcount[OPTIM_VECTOR_COMPONENTS];
                                out = (ast_expression*)ast_member_new(ctx, exprs[1], 2, NULL);
                                out->node.keep = false;
                                ((ast_member*)out)->rvalue = true;
                                if (vec.z != 1)
                                    out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_F, (ast_expression*)parser_const_float(parser, vec.z), out);
                            }
                            else
                                out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_V, exprs[0], exprs[1]);
                        }
                        else if (OPTS_OPTIMIZATION(OPTIM_VECTOR_COMPONENTS) && CanConstFold1(exprs[1])) {
                            vector vec = ConstV(1);
                            if (!vec.y && !vec.z) { /* v * 'n 0 0' */
                                ++opts_optimizationcount[OPTIM_VECTOR_COMPONENTS];
                                out = (ast_expression*)ast_member_new(ctx, exprs[0], 0, NULL);
                                out->node.keep = false;
                                ((ast_member*)out)->rvalue = true;
                                if (vec.x != 1)
                                    out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_F, out, (ast_expression*)parser_const_float(parser, vec.x));
                            }
                            else if (!vec.x && !vec.z) { /* v * '0 n 0' */
                                ++opts_optimizationcount[OPTIM_VECTOR_COMPONENTS];
                                out = (ast_expression*)ast_member_new(ctx, exprs[0], 1, NULL);
                                out->node.keep = false;
                                ((ast_member*)out)->rvalue = true;
                                if (vec.y != 1)
                                    out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_F, out, (ast_expression*)parser_const_float(parser, vec.y));
                            }
                            else if (!vec.x && !vec.y) { /* v * '0 n 0' */
                                ++opts_optimizationcount[OPTIM_VECTOR_COMPONENTS];
                                out = (ast_expression*)ast_member_new(ctx, exprs[0], 2, NULL);
                                out->node.keep = false;
                                ((ast_member*)out)->rvalue = true;
                                if (vec.z != 1)
                                    out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_F, out, (ast_expression*)parser_const_float(parser, vec.z));
                            }
                            else
                                out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_V, exprs[0], exprs[1]);
                        }
                        else
                            out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_V, exprs[0], exprs[1]);
                    }
                    break;
                default:
                    compile_error(ctx, "invalid types used in expression: cannot multiply types %s and %s",
                                  type_name[exprs[1]->vtype],
                                  type_name[exprs[0]->vtype]);
                    return false;
            };
            break;
        case opid1('/'):
            if (exprs[1]->vtype != TYPE_FLOAT) {
                ast_type_to_string(exprs[0], ty1, sizeof(ty1));
                ast_type_to_string(exprs[1], ty2, sizeof(ty2));
                compile_error(ctx, "invalid types used in expression: cannot divide tyeps %s and %s", ty1, ty2);
                return false;
            }
            if (exprs[0]->vtype == TYPE_FLOAT) {
                if (CanConstFold(exprs[0], exprs[1]))
                    out = (ast_expression*)parser_const_float(parser, ConstF(0) / ConstF(1));
                else
                    out = (ast_expression*)ast_binary_new(ctx, INSTR_DIV_F, exprs[0], exprs[1]);
            }
            else if (exprs[0]->vtype == TYPE_VECTOR) {
                if (CanConstFold(exprs[0], exprs[1]))
                    out = (ast_expression*)parser_const_vector(parser, vec3_mulvf(ConstV(0), 1.0/ConstF(1)));
                else {
                    if (CanConstFold1(exprs[1])) {
                        out = (ast_expression*)parser_const_float(parser, 1.0 / ConstF(1));
                    } else {
                        out = (ast_expression*)ast_binary_new(ctx, INSTR_DIV_F,
                                                              (ast_expression*)parser_const_float_1(parser),
                                                              exprs[1]);
                    }
                    if (!out) {
                        compile_error(ctx, "internal error: failed to generate division");
                        return false;
                    }
                    out = (ast_expression*)ast_binary_new(ctx, INSTR_MUL_VF, exprs[0], out);
                }
            }
            else
            {
                ast_type_to_string(exprs[0], ty1, sizeof(ty1));
                ast_type_to_string(exprs[1], ty2, sizeof(ty2));
                compile_error(ctx, "invalid types used in expression: cannot divide tyeps %s and %s", ty1, ty2);
                return false;
            }
            break;

        case opid1('%'):
            if (NotSameType(TYPE_FLOAT)) {
                compile_error(ctx, "invalid types used in expression: cannot perform modulo operation between types %s and %s",
                    type_name[exprs[0]->vtype],
                    type_name[exprs[1]->vtype]);
                return false;
            }
            if (CanConstFold(exprs[0], exprs[1])) {
                out = (ast_expression*)parser_const_float(parser,
                            (float)(((qcint)ConstF(0)) % ((qcint)ConstF(1))));
            } else {
                /* generate a call to __builtin_mod */
                ast_expression *mod  = intrin_func(parser, "mod");
                ast_call       *call = NULL;
                if (!mod) return false; /* can return null for missing floor */

                call = ast_call_new(parser_ctx(parser), mod);
                vec_push(call->params, exprs[0]);
                vec_push(call->params, exprs[1]);

                out = (ast_expression*)call;
            }
            break;

        case opid2('%','='):
            compile_error(ctx, "%= is unimplemented");
            return false;

        case opid1('|'):
        case opid1('&'):
            if (NotSameType(TYPE_FLOAT)) {
                compile_error(ctx, "invalid types used in expression: cannot perform bit operations between types %s and %s",
                              type_name[exprs[0]->vtype],
                              type_name[exprs[1]->vtype]);
                return false;
            }
            if (CanConstFold(exprs[0], exprs[1]))
                out = (ast_expression*)parser_const_float(parser,
                    (op->id == opid1('|') ? (float)( ((qcint)ConstF(0)) | ((qcint)ConstF(1)) ) :
                                            (float)( ((qcint)ConstF(0)) & ((qcint)ConstF(1)) ) ));
            else
                out = (ast_expression*)ast_binary_new(ctx,
                    (op->id == opid1('|') ? INSTR_BITOR : INSTR_BITAND),
                    exprs[0], exprs[1]);
            break;
        case opid1('^'):
            compile_error(ast_ctx(exprs[0]), "Not Yet Implemented: bit-xor via ^");
            return false;

        case opid2('<','<'):
        case opid2('>','>'):
            if (CanConstFold(exprs[0], exprs[1]) && ! NotSameType(TYPE_FLOAT)) {
                if (op->id == opid2('<','<'))
                    out = (ast_expression*)parser_const_float(parser, (double)((unsigned int)(ConstF(0)) << (unsigned int)(ConstF(1))));
                else
                    out = (ast_expression*)parser_const_float(parser, (double)((unsigned int)(ConstF(0)) >> (unsigned int)(ConstF(1))));
                break;
            }
        case opid3('<','<','='):
        case opid3('>','>','='):
            compile_error(ast_ctx(exprs[0]), "Not Yet Implemented: bit-shifts");
            return false;

        case opid2('|','|'):
            generated_op += 1; /* INSTR_OR */
        case opid2('&','&'):
            generated_op += INSTR_AND;
            if (CanConstFold(exprs[0], exprs[1]))
            {
                if (OPTS_FLAG(PERL_LOGIC)) {
                    if (immediate_is_true(ctx, asvalue[0]))
                        out = exprs[1];
                }
                else
                    out = (ast_expression*)parser_const_float(parser,
                          ( (generated_op == INSTR_OR)
                            ? (immediate_is_true(ctx, asvalue[0]) || immediate_is_true(ctx, asvalue[1]))
                            : (immediate_is_true(ctx, asvalue[0]) && immediate_is_true(ctx, asvalue[1])) )
                          ? 1 : 0);
            }
            else
            {
                if (OPTS_FLAG(PERL_LOGIC) && !ast_compare_type(exprs[0], exprs[1])) {
                    ast_type_to_string(exprs[0], ty1, sizeof(ty1));
                    ast_type_to_string(exprs[1], ty2, sizeof(ty2));
                    compile_error(ctx, "invalid types for logical operation with -fperl-logic: %s and %s", ty1, ty2);
                    return false;
                }
                for (i = 0; i < 2; ++i) {
                    if (OPTS_FLAG(CORRECT_LOGIC) && exprs[i]->vtype == TYPE_VECTOR) {
                        out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_V, exprs[i]);
                        if (!out) break;
                        out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_F, out);
                        if (!out) break;
                        exprs[i] = out; out = NULL;
                        if (OPTS_FLAG(PERL_LOGIC)) {
                            /* here we want to keep the right expressions' type */
                            break;
                        }
                    }
                    else if (OPTS_FLAG(FALSE_EMPTY_STRINGS) && exprs[i]->vtype == TYPE_STRING) {
                        out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_S, exprs[i]);
                        if (!out) break;
                        out = (ast_expression*)ast_unary_new(ctx, INSTR_NOT_F, out);
                        if (!out) break;
                        exprs[i] = out; out = NULL;
                        if (OPTS_FLAG(PERL_LOGIC)) {
                            /* here we want to keep the right expressions' type */
                            break;
                        }
                    }
                }
                out = (ast_expression*)ast_binary_new(ctx, generated_op, exprs[0], exprs[1]);
            }
            break;

        case opid2('?',':'):
            if (vec_last(sy->paren) != PAREN_TERNARY2) {
                compile_error(ctx, "mismatched parenthesis/ternary");
                return false;
            }
            vec_pop(sy->paren);
            if (!ast_compare_type(exprs[1], exprs[2])) {
                ast_type_to_string(exprs[1], ty1, sizeof(ty1));
                ast_type_to_string(exprs[2], ty2, sizeof(ty2));
                compile_error(ctx, "operands of ternary expression must have the same type, got %s and %s", ty1, ty2);
                return false;
            }
            if (CanConstFold1(exprs[0]))
                out = (immediate_is_true(ctx, asvalue[0]) ? exprs[1] : exprs[2]);
            else
                out = (ast_expression*)ast_ternary_new(ctx, exprs[0], exprs[1], exprs[2]);
            break;

        case opid2('*', '*'):
            if (NotSameType(TYPE_FLOAT)) {
                ast_type_to_string(exprs[0], ty1, sizeof(ty1));
                ast_type_to_string(exprs[1], ty2, sizeof(ty2));
                compile_error(ctx, "invalid types used in exponentiation: %s and %s",
                    ty1, ty2);

                return false;
            }

            if (CanConstFold(exprs[0], exprs[1])) {
                out = (ast_expression*)parser_const_float(parser, powf(ConstF(0), ConstF(1)));
            } else {
                ast_call *gencall = ast_call_new(parser_ctx(parser), intrin_func(parser, "pow"));
                vec_push(gencall->params, exprs[0]);
                vec_push(gencall->params, exprs[1]);
                out = (ast_expression*)gencall;
            }
            break;

        case opid3('<','=','>'): /* -1, 0, or 1 */
            if (NotSameType(TYPE_FLOAT)) {
                ast_type_to_string(exprs[0], ty1, sizeof(ty1));
                ast_type_to_string(exprs[1], ty2, sizeof(ty2));
                compile_error(ctx, "invalid types used in comparision: %s and %s",
                    ty1, ty2);

                return false;
            }

            if (CanConstFold(exprs[0], exprs[1])) {
                if (ConstF(0) < ConstF(1))
                    out = (ast_expression*)parser_const_float_neg1(parser);
                else if (ConstF(0) == ConstF(1))
                    out = (ast_expression*)parser_const_float_0(parser);
                else if (ConstF(0) > ConstF(1))
                    out = (ast_expression*)parser_const_float_1(parser);
            } else {
                ast_binary *eq = ast_binary_new(ctx, INSTR_EQ_F, exprs[0], exprs[1]);

                eq->refs = (ast_binary_ref)false; /* references nothing */

                    /* if (lt) { */
                out = (ast_expression*)ast_ternary_new(ctx,
                        (ast_expression*)ast_binary_new(ctx, INSTR_LT, exprs[0], exprs[1]),
                        /* out = -1 */
                        (ast_expression*)parser_const_float_neg1(parser),
                    /* } else { */
                        /* if (eq) { */
                        (ast_expression*)ast_ternary_new(ctx, (ast_expression*)eq,
                            /* out = 0 */
                            (ast_expression*)parser_const_float_0(parser),
                        /* } else { */
                            /* out = 1 */
                            (ast_expression*)parser_const_float_1(parser)
                        /* } */
                        )
                    /* } */
                    );

            }
            break;

        case opid1('>'):
            generated_op += 1; /* INSTR_GT */
        case opid1('<'):
            generated_op += 1; /* INSTR_LT */
        case opid2('>', '='):
            generated_op += 1; /* INSTR_GE */
        case opid2('<', '='):
            generated_op += INSTR_LE;
            if (NotSameType(TYPE_FLOAT)) {
                compile_error(ctx, "invalid types used in expression: cannot perform comparison between types %s and %s",
                              type_name[exprs[0]->vtype],
                              type_name[exprs[1]->vtype]);
                return false;
            }
            out = (ast_expression*)ast_binary_new(ctx, generated_op, exprs[0], exprs[1]);
            break;
        case opid2('!', '='):
            if (exprs[0]->vtype != exprs[1]->vtype) {
                compile_error(ctx, "invalid types used in expression: cannot perform comparison between types %s and %s",
                              type_name[exprs[0]->vtype],
                              type_name[exprs[1]->vtype]);
                return false;
            }
            out = (ast_expression*)ast_binary_new(ctx, type_ne_instr[exprs[0]->vtype], exprs[0], exprs[1]);
            break;
        case opid2('=', '='):
            if (exprs[0]->vtype != exprs[1]->vtype) {
                compile_error(ctx, "invalid types used in expression: cannot perform comparison between types %s and %s",
                              type_name[exprs[0]->vtype],
                              type_name[exprs[1]->vtype]);
                return false;
            }
            out = (ast_expression*)ast_binary_new(ctx, type_eq_instr[exprs[0]->vtype], exprs[0], exprs[1]);
            break;

        case opid1('='):
            if (ast_istype(exprs[0], ast_entfield)) {
                ast_expression *field = ((ast_entfield*)exprs[0])->field;
                if (OPTS_FLAG(ADJUST_VECTOR_FIELDS) &&
                    exprs[0]->vtype == TYPE_FIELD &&
                    exprs[0]->next->vtype == TYPE_VECTOR)
                {
                    assignop = type_storep_instr[TYPE_VECTOR];
                }
                else
                    assignop = type_storep_instr[exprs[0]->vtype];
                if (assignop == VINSTR_END || !ast_compare_type(field->next, exprs[1]))
                {
                    ast_type_to_string(field->next, ty1, sizeof(ty1));
                    ast_type_to_string(exprs[1], ty2, sizeof(ty2));
                    if (OPTS_FLAG(ASSIGN_FUNCTION_TYPES) &&
                        field->next->vtype == TYPE_FUNCTION &&
                        exprs[1]->vtype == TYPE_FUNCTION)
                    {
                        (void)!compile_warning(ctx, WARN_ASSIGN_FUNCTION_TYPES,
                                               "invalid types in assignment: cannot assign %s to %s", ty2, ty1);
                    }
                    else
                        compile_error(ctx, "invalid types in assignment: cannot assign %s to %s", ty2, ty1);
                }
            }
            else
            {
                if (OPTS_FLAG(ADJUST_VECTOR_FIELDS) &&
                    exprs[0]->vtype == TYPE_FIELD &&
                    exprs[0]->next->vtype == TYPE_VECTOR)
                {
                    assignop = type_store_instr[TYPE_VECTOR];
                }
                else {
                    assignop = type_store_instr[exprs[0]->vtype];
                }

                if (assignop == VINSTR_END) {
                    ast_type_to_string(exprs[0], ty1, sizeof(ty1));
                    ast_type_to_string(exprs[1], ty2, sizeof(ty2));
                    compile_error(ctx, "invalid types in assignment: cannot assign %s to %s", ty2, ty1);
                }
                else if (!ast_compare_type(exprs[0], exprs[1]))
                {
                    ast_type_to_string(exprs[0], ty1, sizeof(ty1));
                    ast_type_to_string(exprs[1], ty2, sizeof(ty2));
                    if (OPTS_FLAG(ASSIGN_FUNCTION_TYPES) &&
                        exprs[0]->vtype == TYPE_FUNCTION &&
                        exprs[1]->vtype == TYPE_FUNCTION)
                    {
                        (void)!compile_warning(ctx, WARN_ASSIGN_FUNCTION_TYPES,
                                               "invalid types in assignment: cannot assign %s to %s", ty2, ty1);
                    }
                    else
                        compile_error(ctx, "invalid types in assignment: cannot assign %s to %s", ty2, ty1);
                }
            }
            if (ast_istype(exprs[0], ast_value) && asvalue[0]->cvq == CV_CONST) {
                compile_error(ctx, "assignment to constant `%s`", asvalue[0]->name);
            }
            out = (ast_expression*)ast_store_new(ctx, assignop, exprs[0], exprs[1]);
            break;
        case opid3('+','+','P'):
        case opid3('-','-','P'):
            /* prefix ++ */
            if (exprs[0]->vtype != TYPE_FLOAT) {
                ast_type_to_string(exprs[0], ty1, sizeof(ty1));
                compile_error(ast_ctx(exprs[0]), "invalid type for prefix increment: %s", ty1);
                return false;
            }
            if (op->id == opid3('+','+','P'))
                addop = INSTR_ADD_F;
            else
                addop = INSTR_SUB_F;
            if (ast_istype(exprs[0], ast_value) && asvalue[0]->cvq == CV_CONST) {
                compile_error(ast_ctx(exprs[0]), "assignment to constant `%s`", asvalue[0]->name);
            }
            if (ast_istype(exprs[0], ast_entfield)) {
                out = (ast_expression*)ast_binstore_new(ctx, INSTR_STOREP_F, addop,
                                                        exprs[0],
                                                        (ast_expression*)parser_const_float_1(parser));
            } else {
                out = (ast_expression*)ast_binstore_new(ctx, INSTR_STORE_F, addop,
                                                        exprs[0],
                                                        (ast_expression*)parser_const_float_1(parser));
            }
            break;
        case opid3('S','+','+'):
        case opid3('S','-','-'):
            /* prefix ++ */
            if (exprs[0]->vtype != TYPE_FLOAT) {
                ast_type_to_string(exprs[0], ty1, sizeof(ty1));
                compile_error(ast_ctx(exprs[0]), "invalid type for suffix increment: %s", ty1);
                return false;
            }
            if (op->id == opid3('S','+','+')) {
                addop = INSTR_ADD_F;
                subop = INSTR_SUB_F;
            } else {
                addop = INSTR_SUB_F;
                subop = INSTR_ADD_F;
            }
            if (ast_istype(exprs[0], ast_value) && asvalue[0]->cvq == CV_CONST) {
                compile_error(ast_ctx(exprs[0]), "assignment to constant `%s`", asvalue[0]->name);
            }
            if (ast_istype(exprs[0], ast_entfield)) {
                out = (ast_expression*)ast_binstore_new(ctx, INSTR_STOREP_F, addop,
                                                        exprs[0],
                                                        (ast_expression*)parser_const_float_1(parser));
            } else {
                out = (ast_expression*)ast_binstore_new(ctx, INSTR_STORE_F, addop,
                                                        exprs[0],
                                                        (ast_expression*)parser_const_float_1(parser));
            }
            if (!out)
                return false;
            out = (ast_expression*)ast_binary_new(ctx, subop,
                                                  out,
                                                  (ast_expression*)parser_const_float_1(parser));
            break;
        case opid2('+','='):
        case opid2('-','='):
            if (exprs[0]->vtype != exprs[1]->vtype ||
                (exprs[0]->vtype != TYPE_VECTOR && exprs[0]->vtype != TYPE_FLOAT) )
            {
                ast_type_to_string(exprs[0], ty1, sizeof(ty1));
                ast_type_to_string(exprs[1], ty2, sizeof(ty2));
                compile_error(ctx, "invalid types used in expression: cannot add or subtract type %s and %s",
                              ty1, ty2);
                return false;
            }
            if (ast_istype(exprs[0], ast_value) && asvalue[0]->cvq == CV_CONST) {
                compile_error(ctx, "assignment to constant `%s`", asvalue[0]->name);
            }
            if (ast_istype(exprs[0], ast_entfield))
                assignop = type_storep_instr[exprs[0]->vtype];
            else
                assignop = type_store_instr[exprs[0]->vtype];
            switch (exprs[0]->vtype) {
                case TYPE_FLOAT:
                    out = (ast_expression*)ast_binstore_new(ctx, assignop,
                                                            (op->id == opid2('+','=') ? INSTR_ADD_F : INSTR_SUB_F),
                                                            exprs[0], exprs[1]);
                    break;
                case TYPE_VECTOR:
                    out = (ast_expression*)ast_binstore_new(ctx, assignop,
                                                            (op->id == opid2('+','=') ? INSTR_ADD_V : INSTR_SUB_V),
                                                            exprs[0], exprs[1]);
                    break;
                default:
                    compile_error(ctx, "invalid types used in expression: cannot add or subtract type %s and %s",
                                  type_name[exprs[0]->vtype],
                                  type_name[exprs[1]->vtype]);
                    return false;
            };
            break;
        case opid2('*','='):
        case opid2('/','='):
            if (exprs[1]->vtype != TYPE_FLOAT ||
                !(exprs[0]->vtype == TYPE_FLOAT ||
                  exprs[0]->vtype == TYPE_VECTOR))
            {
                ast_type_to_string(exprs[0], ty1, sizeof(ty1));
                ast_type_to_string(exprs[1], ty2, sizeof(ty2));
                compile_error(ctx, "invalid types used in expression: %s and %s",
                              ty1, ty2);
                return false;
            }
            if (ast_istype(exprs[0], ast_value) && asvalue[0]->cvq == CV_CONST) {
                compile_error(ctx, "assignment to constant `%s`", asvalue[0]->name);
            }
            if (ast_istype(exprs[0], ast_entfield))
                assignop = type_storep_instr[exprs[0]->vtype];
            else
                assignop = type_store_instr[exprs[0]->vtype];
            switch (exprs[0]->vtype) {
                case TYPE_FLOAT:
                    out = (ast_expression*)ast_binstore_new(ctx, assignop,
                                                            (op->id == opid2('*','=') ? INSTR_MUL_F : INSTR_DIV_F),
                                                            exprs[0], exprs[1]);
                    break;
                case TYPE_VECTOR:
                    if (op->id == opid2('*','=')) {
                        out = (ast_expression*)ast_binstore_new(ctx, assignop, INSTR_MUL_VF,
                                                                exprs[0], exprs[1]);
                    } else {
                        /* there's no DIV_VF */
                        if (CanConstFold1(exprs[1])) {
                            out = (ast_expression*)parser_const_float(parser, 1.0 / ConstF(1));
                        } else {
                            out = (ast_expression*)ast_binary_new(ctx, INSTR_DIV_F,
                                                                  (ast_expression*)parser_const_float_1(parser),
                                                                  exprs[1]);
                        }
                        if (!out) {
                            compile_error(ctx, "internal error: failed to generate division");
                            return false;
                        }
                        out = (ast_expression*)ast_binstore_new(ctx, assignop, INSTR_MUL_VF,
                                                                exprs[0], out);
                    }
                    break;
                default:
                    compile_error(ctx, "invalid types used in expression: cannot add or subtract type %s and %s",
                                  type_name[exprs[0]->vtype],
                                  type_name[exprs[1]->vtype]);
                    return false;
            };
            break;
        case opid2('&','='):
        case opid2('|','='):
            if (NotSameType(TYPE_FLOAT)) {
                ast_type_to_string(exprs[0], ty1, sizeof(ty1));
                ast_type_to_string(exprs[1], ty2, sizeof(ty2));
                compile_error(ctx, "invalid types used in expression: %s and %s",
                              ty1, ty2);
                return false;
            }
            if (ast_istype(exprs[0], ast_value) && asvalue[0]->cvq == CV_CONST) {
                compile_error(ctx, "assignment to constant `%s`", asvalue[0]->name);
            }
            if (ast_istype(exprs[0], ast_entfield))
                assignop = type_storep_instr[exprs[0]->vtype];
            else
                assignop = type_store_instr[exprs[0]->vtype];
            out = (ast_expression*)ast_binstore_new(ctx, assignop,
                                                    (op->id == opid2('&','=') ? INSTR_BITAND : INSTR_BITOR),
                                                    exprs[0], exprs[1]);
            break;
        case opid3('&','~','='):
            /* This is like: a &= ~(b);
             * But QC has no bitwise-not, so we implement it as
             * a -= a & (b);
             */
            if (NotSameType(TYPE_FLOAT)) {
                ast_type_to_string(exprs[0], ty1, sizeof(ty1));
                ast_type_to_string(exprs[1], ty2, sizeof(ty2));
                compile_error(ctx, "invalid types used in expression: %s and %s",
                              ty1, ty2);
                return false;
            }
            if (ast_istype(exprs[0], ast_entfield))
                assignop = type_storep_instr[exprs[0]->vtype];
            else
                assignop = type_store_instr[exprs[0]->vtype];
            out = (ast_expression*)ast_binary_new(ctx, INSTR_BITAND, exprs[0], exprs[1]);
            if (!out)
                return false;
            if (ast_istype(exprs[0], ast_value) && asvalue[0]->cvq == CV_CONST) {
                compile_error(ctx, "assignment to constant `%s`", asvalue[0]->name);
            }
            asbinstore = ast_binstore_new(ctx, assignop, INSTR_SUB_F, exprs[0], out);
            asbinstore->keep_dest = true;
            out = (ast_expression*)asbinstore;
            break;

        case opid2('~', 'P'):
            if (exprs[0]->vtype != TYPE_FLOAT) {
                ast_type_to_string(exprs[0], ty1, sizeof(ty1));
                compile_error(ast_ctx(exprs[0]), "invalid type for bit not: %s", ty1);
                return false;
            }

            if(CanConstFold1(exprs[0]))
                out = (ast_expression*)parser_const_float(parser, ~(qcint)ConstF(0));
            else
                out = (ast_expression*)
                    ast_binary_new(ctx, INSTR_SUB_F, (ast_expression*)parser_const_float_neg1(parser), exprs[0]);
            break;
    }
#undef NotSameType

    if (!out) {
        compile_error(ctx, "failed to apply operator %s", op->op);
        return false;
    }

    vec_push(sy->out, syexp(ctx, out));
    return true;
}

static bool parser_close_call(parser_t *parser, shunt *sy)
{
    /* was a function call */
    ast_expression *fun;
    ast_value      *funval = NULL;
    ast_call       *call;

    size_t          fid;
    size_t          paramcount, i;

    fid = vec_last(sy->ops).off;
    vec_shrinkby(sy->ops, 1);

    /* out[fid] is the function
     * everything above is parameters...
     */
    if (!vec_size(sy->argc)) {
        parseerror(parser, "internal error: no argument counter available");
        return false;
    }

    paramcount = vec_last(sy->argc);
    vec_pop(sy->argc);

    if (vec_size(sy->out) < fid) {
        parseerror(parser, "internal error: broken function call%lu < %lu+%lu\n",
                   (unsigned long)vec_size(sy->out),
                   (unsigned long)fid,
                   (unsigned long)paramcount);
        return false;
    }

    fun = sy->out[fid].out;

    if (fun == intrinsic_debug_typestring) {
        char ty[1024];
        if (fid+2 != vec_size(sy->out) ||
            vec_last(sy->out).block)
        {
            parseerror(parser, "intrinsic __builtin_debug_typestring requires exactly 1 parameter");
            return false;
        }
        ast_type_to_string(vec_last(sy->out).out, ty, sizeof(ty));
        ast_unref(vec_last(sy->out).out);
        sy->out[fid] = syexp(ast_ctx(vec_last(sy->out).out),
                             (ast_expression*)parser_const_string(parser, ty, false));
        vec_shrinkby(sy->out, 1);
        return true;
    }

    call = ast_call_new(sy->ops[vec_size(sy->ops)].ctx, fun);
    if (!call)
        return false;

    if (fid+1 < vec_size(sy->out))
        ++paramcount;

    if (fid+1 + paramcount != vec_size(sy->out)) {
        parseerror(parser, "internal error: parameter count mismatch: (%lu+1+%lu), %lu",
                   (unsigned long)fid, (unsigned long)paramcount, (unsigned long)vec_size(sy->out));
        return false;
    }

    for (i = 0; i < paramcount; ++i)
        vec_push(call->params, sy->out[fid+1 + i].out);
    vec_shrinkby(sy->out, paramcount);
    (void)!ast_call_check_types(call);
    if (parser->max_param_count < paramcount)
        parser->max_param_count = paramcount;

    if (ast_istype(fun, ast_value)) {
        funval = (ast_value*)fun;
        if ((fun->flags & AST_FLAG_VARIADIC) &&
            !(/*funval->cvq == CV_CONST && */ funval->hasvalue && funval->constval.vfunc->builtin))
        {
            call->va_count = (ast_expression*)parser_const_float(parser, (double)paramcount);
        }
    }

    /* overwrite fid, the function, with a call */
    sy->out[fid] = syexp(call->expression.node.context, (ast_expression*)call);

    if (fun->vtype != TYPE_FUNCTION) {
        parseerror(parser, "not a function (%s)", type_name[fun->vtype]);
        return false;
    }

    if (!fun->next) {
        parseerror(parser, "could not determine function return type");
        return false;
    } else {
        ast_value *fval = (ast_istype(fun, ast_value) ? ((ast_value*)fun) : NULL);

        if (fun->flags & AST_FLAG_DEPRECATED) {
            if (!fval) {
                return !parsewarning(parser, WARN_DEPRECATED,
                        "call to function (which is marked deprecated)\n",
                        "-> it has been declared here: %s:%i",
                        ast_ctx(fun).file, ast_ctx(fun).line);
            }
            if (!fval->desc) {
                return !parsewarning(parser, WARN_DEPRECATED,
                        "call to `%s` (which is marked deprecated)\n"
                        "-> `%s` declared here: %s:%i",
                        fval->name, fval->name, ast_ctx(fun).file, ast_ctx(fun).line);
            }
            return !parsewarning(parser, WARN_DEPRECATED,
                    "call to `%s` (deprecated: %s)\n"
                    "-> `%s` declared here: %s:%i",
                    fval->name, fval->desc, fval->name, ast_ctx(fun).file,
                    ast_ctx(fun).line);
        }

        if (vec_size(fun->params) != paramcount &&
            !((fun->flags & AST_FLAG_VARIADIC) &&
              vec_size(fun->params) < paramcount))
        {
            const char *fewmany = (vec_size(fun->params) > paramcount) ? "few" : "many";
            if (fval)
                return !parsewarning(parser, WARN_INVALID_PARAMETER_COUNT,
                                     "too %s parameters for call to %s: expected %i, got %i\n"
                                     " -> `%s` has been declared here: %s:%i",
                                     fewmany, fval->name, (int)vec_size(fun->params), (int)paramcount,
                                     fval->name, ast_ctx(fun).file, (int)ast_ctx(fun).line);
            else
                return !parsewarning(parser, WARN_INVALID_PARAMETER_COUNT,
                                     "too %s parameters for function call: expected %i, got %i\n"
                                     " -> it has been declared here: %s:%i",
                                     fewmany, (int)vec_size(fun->params), (int)paramcount,
                                     ast_ctx(fun).file, (int)ast_ctx(fun).line);
        }
    }

    return true;
}

static bool parser_close_paren(parser_t *parser, shunt *sy)
{
    if (!vec_size(sy->ops)) {
        parseerror(parser, "unmatched closing paren");
        return false;
    }

    while (vec_size(sy->ops)) {
        if (vec_last(sy->ops).isparen) {
            if (vec_last(sy->paren) == PAREN_FUNC) {
                vec_pop(sy->paren);
                if (!parser_close_call(parser, sy))
                    return false;
                break;
            }
            if (vec_last(sy->paren) == PAREN_EXPR) {
                vec_pop(sy->paren);
                if (!vec_size(sy->out)) {
                    compile_error(vec_last(sy->ops).ctx, "empty paren expression");
                    vec_shrinkby(sy->ops, 1);
                    return false;
                }
                vec_shrinkby(sy->ops, 1);
                break;
            }
            if (vec_last(sy->paren) == PAREN_INDEX) {
                vec_pop(sy->paren);
                /* pop off the parenthesis */
                vec_shrinkby(sy->ops, 1);
                /* then apply the index operator */
                if (!parser_sy_apply_operator(parser, sy))
                    return false;
                break;
            }
            if (vec_last(sy->paren) == PAREN_TERNARY1) {
                vec_last(sy->paren) = PAREN_TERNARY2;
                /* pop off the parenthesis */
                vec_shrinkby(sy->ops, 1);
                break;
            }
            compile_error(vec_last(sy->ops).ctx, "invalid parenthesis");
            return false;
        }
        if (!parser_sy_apply_operator(parser, sy))
            return false;
    }
    return true;
}

static void parser_reclassify_token(parser_t *parser)
{
    size_t i;
    for (i = 0; i < operator_count; ++i) {
        if (!strcmp(parser_tokval(parser), operators[i].op)) {
            parser->tok = TOKEN_OPERATOR;
            return;
        }
    }
}

static ast_expression* parse_vararg_do(parser_t *parser)
{
    ast_expression *idx, *out;
    ast_value      *typevar;
    ast_value      *funtype = parser->function->vtype;

    lex_ctx ctx = parser_ctx(parser);

    if (!parser_next(parser) || parser->tok != '(') {
        parseerror(parser, "expected parameter index and type in parenthesis");
        return NULL;
    }
    if (!parser_next(parser)) {
        parseerror(parser, "error parsing parameter index");
        return NULL;
    }

    idx = parse_expression_leave(parser, true, false, false);
    if (!idx)
        return NULL;

    if (parser->tok != ',') {
        ast_unref(idx);
        parseerror(parser, "expected comma after parameter index");
        return NULL;
    }

    if (!parser_next(parser) || (parser->tok != TOKEN_IDENT && parser->tok != TOKEN_TYPENAME)) {
        ast_unref(idx);
        parseerror(parser, "expected typename for vararg");
        return NULL;
    }

    typevar = parse_typename(parser, NULL, NULL);
    if (!typevar) {
        ast_unref(idx);
        return NULL;
    }

    if (parser->tok != ')') {
        ast_unref(idx);
        ast_delete(typevar);
        parseerror(parser, "expected closing paren");
        return NULL;
    }

#if 0
    if (!parser_next(parser)) {
        ast_unref(idx);
        ast_delete(typevar);
        parseerror(parser, "parse error after vararg");
        return NULL;
    }
#endif

    if (!parser->function->varargs) {
        ast_unref(idx);
        ast_delete(typevar);
        parseerror(parser, "function has no variable argument list");
        return NULL;
    }

    if (funtype->expression.varparam &&
        !ast_compare_type((ast_expression*)typevar, (ast_expression*)funtype->expression.varparam))
    {
        char ty1[1024];
        char ty2[1024];
        ast_type_to_string((ast_expression*)typevar, ty1, sizeof(ty1));
        ast_type_to_string((ast_expression*)funtype->expression.varparam, ty2, sizeof(ty2));
        compile_error(ast_ctx(typevar),
                      "function was declared to take varargs of type `%s`, requested type is: %s",
                      ty2, ty1);
    }

    out = (ast_expression*)ast_array_index_new(ctx, (ast_expression*)(parser->function->varargs), idx);
    ast_type_adopt(out, typevar);
    ast_delete(typevar);
    return out;
}

static ast_expression* parse_vararg(parser_t *parser)
{
    bool           old_noops = parser->lex->flags.noops;

    ast_expression *out;

    parser->lex->flags.noops = true;
    out = parse_vararg_do(parser);

    parser->lex->flags.noops = old_noops;
    return out;
}

/* not to be exposed */
extern bool ftepp_predef_exists(const char *name);

static bool parse_sya_operand(parser_t *parser, shunt *sy, bool with_labels)
{
    if (OPTS_FLAG(TRANSLATABLE_STRINGS) &&
        parser->tok == TOKEN_IDENT &&
        !strcmp(parser_tokval(parser), "_"))
    {
        /* a translatable string */
        ast_value *val;

        parser->lex->flags.noops = true;
        if (!parser_next(parser) || parser->tok != '(') {
            parseerror(parser, "use _(\"string\") to create a translatable string constant");
            return false;
        }
        parser->lex->flags.noops = false;
        if (!parser_next(parser) || parser->tok != TOKEN_STRINGCONST) {
            parseerror(parser, "expected a constant string in translatable-string extension");
            return false;
        }
        val = parser_const_string(parser, parser_tokval(parser), true);
        if (!val)
            return false;
        vec_push(sy->out, syexp(parser_ctx(parser), (ast_expression*)val));

        if (!parser_next(parser) || parser->tok != ')') {
            parseerror(parser, "expected closing paren after translatable string");
            return false;
        }
        return true;
    }
    else if (parser->tok == TOKEN_DOTS)
    {
        ast_expression *va;
        if (!OPTS_FLAG(VARIADIC_ARGS)) {
            parseerror(parser, "cannot access varargs (try -fvariadic-args)");
            return false;
        }
        va = parse_vararg(parser);
        if (!va)
            return false;
        vec_push(sy->out, syexp(parser_ctx(parser), va));
        return true;
    }
    else if (parser->tok == TOKEN_FLOATCONST) {
        ast_value *val;
        val = parser_const_float(parser, (parser_token(parser)->constval.f));
        if (!val)
            return false;
        vec_push(sy->out, syexp(parser_ctx(parser), (ast_expression*)val));
        return true;
    }
    else if (parser->tok == TOKEN_INTCONST || parser->tok == TOKEN_CHARCONST) {
        ast_value *val;
        val = parser_const_float(parser, (double)(parser_token(parser)->constval.i));
        if (!val)
            return false;
        vec_push(sy->out, syexp(parser_ctx(parser), (ast_expression*)val));
        return true;
    }
    else if (parser->tok == TOKEN_STRINGCONST) {
        ast_value *val;
        val = parser_const_string(parser, parser_tokval(parser), false);
        if (!val)
            return false;
        vec_push(sy->out, syexp(parser_ctx(parser), (ast_expression*)val));
        return true;
    }
    else if (parser->tok == TOKEN_VECTORCONST) {
        ast_value *val;
        val = parser_const_vector(parser, parser_token(parser)->constval.v);
        if (!val)
            return false;
        vec_push(sy->out, syexp(parser_ctx(parser), (ast_expression*)val));
        return true;
    }
    else if (parser->tok == TOKEN_IDENT)
    {
        const char     *ctoken = parser_tokval(parser);
        ast_expression *prev = vec_size(sy->out) ? vec_last(sy->out).out : NULL;
        ast_expression *var;
        /* a_vector.{x,y,z} */
        if (!vec_size(sy->ops) ||
            !vec_last(sy->ops).etype ||
            operators[vec_last(sy->ops).etype-1].id != opid1('.') ||
            (prev >= intrinsic_debug_typestring &&
             prev <= intrinsic_debug_typestring))
        {
            /* When adding more intrinsics, fix the above condition */
            prev = NULL;
        }
        if (prev && prev->vtype == TYPE_VECTOR && ctoken[0] >= 'x' && ctoken[0] <= 'z' && !ctoken[1])
        {
            var = (ast_expression*)parser->const_vec[ctoken[0]-'x'];
        } else {
            var = parser_find_var(parser, parser_tokval(parser));
            if (!var)
                var = parser_find_field(parser, parser_tokval(parser));
        }
        if (!var && with_labels) {
            var = (ast_expression*)parser_find_label(parser, parser_tokval(parser));
            if (!with_labels) {
                ast_label *lbl = ast_label_new(parser_ctx(parser), parser_tokval(parser), true);
                var = (ast_expression*)lbl;
                vec_push(parser->labels, lbl);
            }
        }
        if (!var && !strcmp(parser_tokval(parser), "__FUNC__"))
            var = (ast_expression*)parser_const_string(parser, parser->function->name, false);
        if (!var) {
            /* intrinsics */
            if (!strcmp(parser_tokval(parser), "__builtin_debug_typestring")) {
                var = (ast_expression*)intrinsic_debug_typestring;
            }
            /* now we try for the real intrinsic hashtable. If the string
             * begins with __builtin, we simply skip past it, otherwise we
             * use the identifier as is.
             */
            else if (!strncmp(parser_tokval(parser), "__builtin_", 10)) {
                var = intrin_func(parser, parser_tokval(parser) + 10 /* skip __builtin */);
            }

            if (!var) {
                char *correct = NULL;
                size_t i;

                /*
                 * sometimes people use preprocessing predefs without enabling them
                 * i've done this thousands of times already myself.  Lets check for
                 * it in the predef table.  And diagnose it better :)
                 */
                if (!OPTS_FLAG(FTEPP_PREDEFS) && ftepp_predef_exists(parser_tokval(parser))) {
                    parseerror(parser, "unexpected ident: %s (use -fftepp-predef to enable pre-defined macros)", parser_tokval(parser));
                    return false;
                }

                /*
                 * TODO: determine the best score for the identifier: be it
                 * a variable, a field.
                 *
                 * We should also consider adding correction tables for
                 * other things as well.
                 */
                if (OPTS_OPTION_BOOL(OPTION_CORRECTION)) {
                    correction_t corr;
                    correct_init(&corr);

                    for (i = 0; i < vec_size(parser->correct_variables); i++) {
                        correct = correct_str(&corr, parser->correct_variables[i], parser_tokval(parser));
                        if (strcmp(correct, parser_tokval(parser))) {
                            break;
                        } else if (correct) {
                            mem_d(correct);
                            correct = NULL;
                        }
                    }
                    correct_free(&corr);

                    if (correct) {
                        parseerror(parser, "unexpected ident: %s (did you mean %s?)", parser_tokval(parser), correct);
                        mem_d(correct);
                        return false;
                    }
                }
                parseerror(parser, "unexpected ident: %s", parser_tokval(parser));
                return false;
            }
        }
        else
        {
            if (ast_istype(var, ast_value)) {
                ((ast_value*)var)->uses++;
            }
            else if (ast_istype(var, ast_member)) {
                ast_member *mem = (ast_member*)var;
                if (ast_istype(mem->owner, ast_value))
                    ((ast_value*)(mem->owner))->uses++;
            }
        }
        vec_push(sy->out, syexp(parser_ctx(parser), var));
        return true;
    }
    parseerror(parser, "unexpected token `%s`", parser_tokval(parser));
    return false;
}

static ast_expression* parse_expression_leave(parser_t *parser, bool stopatcomma, bool truthvalue, bool with_labels)
{
    ast_expression *expr = NULL;
    shunt sy;
    size_t i;
    bool wantop = false;
    /* only warn once about an assignment in a truth value because the current code
     * would trigger twice on: if(a = b && ...), once for the if-truth-value, once for the && part
     */
    bool warn_truthvalue = true;

    /* count the parens because an if starts with one, so the
     * end of a condition is an unmatched closing paren
     */
    int ternaries = 0;

    memset(&sy, 0, sizeof(sy));

    parser->lex->flags.noops = false;

    parser_reclassify_token(parser);

    while (true)
    {
        if (parser->tok == TOKEN_TYPENAME) {
            parseerror(parser, "unexpected typename");
            goto onerr;
        }

        if (parser->tok == TOKEN_OPERATOR)
        {
            /* classify the operator */
            const oper_info *op;
            const oper_info *olast = NULL;
            size_t o;
            for (o = 0; o < operator_count; ++o) {
                if (((!(operators[o].flags & OP_PREFIX) == !!wantop)) &&
                    /* !(operators[o].flags & OP_SUFFIX) && / * remove this */
                    !strcmp(parser_tokval(parser), operators[o].op))
                {
                    break;
                }
            }
            if (o == operator_count) {
                compile_error(parser_ctx(parser), "unknown operator: %s", parser_tokval(parser));
                goto onerr;
            }
            /* found an operator */
            op = &operators[o];

            /* when declaring variables, a comma starts a new variable */
            if (op->id == opid1(',') && !vec_size(sy.paren) && stopatcomma) {
                /* fixup the token */
                parser->tok = ',';
                break;
            }

            /* a colon without a pervious question mark cannot be a ternary */
            if (!ternaries && op->id == opid2(':','?')) {
                parser->tok = ':';
                break;
            }

            if (op->id == opid1(',')) {
                if (vec_size(sy.paren) && vec_last(sy.paren) == PAREN_TERNARY2) {
                    (void)!parsewarning(parser, WARN_TERNARY_PRECEDENCE, "suggesting parenthesis around ternary expression");
                }
            }

            if (vec_size(sy.ops) && !vec_last(sy.ops).isparen)
                olast = &operators[vec_last(sy.ops).etype-1];

#define IsAssignOp(x) (\
                (x) == opid1('=') || \
                (x) == opid2('+','=') || \
                (x) == opid2('-','=') || \
                (x) == opid2('*','=') || \
                (x) == opid2('/','=') || \
                (x) == opid2('%','=') || \
                (x) == opid2('&','=') || \
                (x) == opid2('|','=') || \
                (x) == opid3('&','~','=') \
                )
            if (warn_truthvalue) {
                if ( (olast && IsAssignOp(olast->id) && (op->id == opid2('&','&') || op->id == opid2('|','|'))) ||
                     (olast && IsAssignOp(op->id) && (olast->id == opid2('&','&') || olast->id == opid2('|','|'))) ||
                     (truthvalue && !vec_size(sy.paren) && IsAssignOp(op->id))
                   )
                {
                    (void)!parsewarning(parser, WARN_PARENTHESIS, "suggesting parenthesis around assignment used as truth value");
                    warn_truthvalue = false;
                }
            }

            while (olast && (
                    (op->prec < olast->prec) ||
                    (op->assoc == ASSOC_LEFT && op->prec <= olast->prec) ) )
            {
                if (!parser_sy_apply_operator(parser, &sy))
                    goto onerr;
                if (vec_size(sy.ops) && !vec_last(sy.ops).isparen)
                    olast = &operators[vec_last(sy.ops).etype-1];
                else
                    olast = NULL;
            }

            if (op->id == opid1('(')) {
                if (wantop) {
                    size_t sycount = vec_size(sy.out);
                    /* we expected an operator, this is the function-call operator */
                    vec_push(sy.paren, PAREN_FUNC);
                    vec_push(sy.ops, syparen(parser_ctx(parser), sycount-1));
                    vec_push(sy.argc, 0);
                } else {
                    vec_push(sy.paren, PAREN_EXPR);
                    vec_push(sy.ops, syparen(parser_ctx(parser), 0));
                }
                wantop = false;
            } else if (op->id == opid1('[')) {
                if (!wantop) {
                    parseerror(parser, "unexpected array subscript");
                    goto onerr;
                }
                vec_push(sy.paren, PAREN_INDEX);
                /* push both the operator and the paren, this makes life easier */
                vec_push(sy.ops, syop(parser_ctx(parser), op));
                vec_push(sy.ops, syparen(parser_ctx(parser), 0));
                wantop = false;
            } else if (op->id == opid2('?',':')) {
                vec_push(sy.ops, syop(parser_ctx(parser), op));
                vec_push(sy.ops, syparen(parser_ctx(parser), 0));
                wantop = false;
                ++ternaries;
                vec_push(sy.paren, PAREN_TERNARY1);
            } else if (op->id == opid2(':','?')) {
                if (!vec_size(sy.paren)) {
                    parseerror(parser, "unexpected colon outside ternary expression (missing parenthesis?)");
                    goto onerr;
                }
                if (vec_last(sy.paren) != PAREN_TERNARY1) {
                    parseerror(parser, "unexpected colon outside ternary expression (missing parenthesis?)");
                    goto onerr;
                }
                if (!parser_close_paren(parser, &sy))
                    goto onerr;
                vec_push(sy.ops, syop(parser_ctx(parser), op));
                wantop = false;
                --ternaries;
            } else {
                vec_push(sy.ops, syop(parser_ctx(parser), op));
                wantop = !!(op->flags & OP_SUFFIX);
            }
        }
        else if (parser->tok == ')') {
            while (vec_size(sy.paren) && vec_last(sy.paren) == PAREN_TERNARY2) {
                if (!parser_sy_apply_operator(parser, &sy))
                    goto onerr;
            }
            if (!vec_size(sy.paren))
                break;
            if (wantop) {
                if (vec_last(sy.paren) == PAREN_TERNARY1) {
                    parseerror(parser, "mismatched parentheses (closing paren in ternary expression?)");
                    goto onerr;
                }
                if (!parser_close_paren(parser, &sy))
                    goto onerr;
            } else {
                /* must be a function call without parameters */
                if (vec_last(sy.paren) != PAREN_FUNC) {
                    parseerror(parser, "closing paren in invalid position");
                    goto onerr;
                }
                if (!parser_close_paren(parser, &sy))
                    goto onerr;
            }
            wantop = true;
        }
        else if (parser->tok == '(') {
            parseerror(parser, "internal error: '(' should be classified as operator");
            goto onerr;
        }
        else if (parser->tok == '[') {
            parseerror(parser, "internal error: '[' should be classified as operator");
            goto onerr;
        }
        else if (parser->tok == ']') {
            while (vec_size(sy.paren) && vec_last(sy.paren) == PAREN_TERNARY2) {
                if (!parser_sy_apply_operator(parser, &sy))
                    goto onerr;
            }
            if (!vec_size(sy.paren))
                break;
            if (vec_last(sy.paren) != PAREN_INDEX) {
                parseerror(parser, "mismatched parentheses, unexpected ']'");
                goto onerr;
            }
            if (!parser_close_paren(parser, &sy))
                goto onerr;
            wantop = true;
        }
        else if (!wantop) {
            if (!parse_sya_operand(parser, &sy, with_labels))
                goto onerr;
#if 0
            if (vec_size(sy.paren) && vec_last(sy.ops).isparen && vec_last(sy.paren) == PAREN_FUNC)
                vec_last(sy.argc)++;
#endif
            wantop = true;
        }
        else {
            /* in this case we might want to allow constant string concatenation */
            bool concatenated = false;
            if (parser->tok == TOKEN_STRINGCONST && vec_size(sy.out)) {
                ast_expression *lexpr = vec_last(sy.out).out;
                if (ast_istype(lexpr, ast_value)) {
                    ast_value *last = (ast_value*)lexpr;
                    if (last->isimm == true && last->cvq == CV_CONST &&
                        last->hasvalue && last->expression.vtype == TYPE_STRING)
                    {
                        char *newstr = NULL;
                        util_asprintf(&newstr, "%s%s", last->constval.vstring, parser_tokval(parser));
                        vec_last(sy.out).out = (ast_expression*)parser_const_string(parser, newstr, false);
                        mem_d(newstr);
                        concatenated = true;
                    }
                }
            }
            if (!concatenated) {
                parseerror(parser, "expected operator or end of statement");
                goto onerr;
            }
        }

        if (!parser_next(parser)) {
            goto onerr;
        }
        if (parser->tok == ';' ||
            ((!vec_size(sy.paren) || (vec_size(sy.paren) == 1 && vec_last(sy.paren) == PAREN_TERNARY2)) &&
            (parser->tok == ']' || parser->tok == ')' || parser->tok == '}')))
        {
            break;
        }
    }

    while (vec_size(sy.ops)) {
        if (!parser_sy_apply_operator(parser, &sy))
            goto onerr;
    }

    parser->lex->flags.noops = true;
    if (vec_size(sy.out) != 1) {
        parseerror(parser, "expression with not 1 but %lu output values...", (unsigned long) vec_size(sy.out));
        expr = NULL;
    } else
        expr = sy.out[0].out;
    vec_free(sy.out);
    vec_free(sy.ops);
    if (vec_size(sy.paren)) {
        parseerror(parser, "internal error: vec_size(sy.paren) = %lu", (unsigned long)vec_size(sy.paren));
        return NULL;
    }
    vec_free(sy.paren);
    vec_free(sy.argc);
    return expr;

onerr:
    parser->lex->flags.noops = true;
    for (i = 0; i < vec_size(sy.out); ++i) {
        if (sy.out[i].out)
            ast_unref(sy.out[i].out);
    }
    vec_free(sy.out);
    vec_free(sy.ops);
    vec_free(sy.paren);
    vec_free(sy.argc);
    return NULL;
}

static ast_expression* parse_expression(parser_t *parser, bool stopatcomma, bool with_labels)
{
    ast_expression *e = parse_expression_leave(parser, stopatcomma, false, with_labels);
    if (!e)
        return NULL;
    if (parser->tok != ';') {
        parseerror(parser, "semicolon expected after expression");
        ast_unref(e);
        return NULL;
    }
    if (!parser_next(parser)) {
        ast_unref(e);
        return NULL;
    }
    return e;
}

static void parser_enterblock(parser_t *parser)
{
    vec_push(parser->variables, util_htnew(PARSER_HT_SIZE));
    vec_push(parser->_blocklocals, vec_size(parser->_locals));
    vec_push(parser->typedefs, util_htnew(TYPEDEF_HT_SIZE));
    vec_push(parser->_blocktypedefs, vec_size(parser->_typedefs));
    vec_push(parser->_block_ctx, parser_ctx(parser));

    /* corrector */
    vec_push(parser->correct_variables, correct_trie_new());
    vec_push(parser->correct_variables_score, NULL);
}

static bool parser_leaveblock(parser_t *parser)
{
    bool   rv = true;
    size_t locals, typedefs;

    if (vec_size(parser->variables) <= PARSER_HT_LOCALS) {
        parseerror(parser, "internal error: parser_leaveblock with no block");
        return false;
    }

    util_htdel(vec_last(parser->variables));
    correct_del(vec_last(parser->correct_variables), vec_last(parser->correct_variables_score));

    vec_pop(parser->variables);
    vec_pop(parser->correct_variables);
    vec_pop(parser->correct_variables_score);
    if (!vec_size(parser->_blocklocals)) {
        parseerror(parser, "internal error: parser_leaveblock with no block (2)");
        return false;
    }

    locals = vec_last(parser->_blocklocals);
    vec_pop(parser->_blocklocals);
    while (vec_size(parser->_locals) != locals) {
        ast_expression *e = vec_last(parser->_locals);
        ast_value      *v = (ast_value*)e;
        vec_pop(parser->_locals);
        if (ast_istype(e, ast_value) && !v->uses) {
            if (compile_warning(ast_ctx(v), WARN_UNUSED_VARIABLE, "unused variable: `%s`", v->name))
                rv = false;
        }
    }

    typedefs = vec_last(parser->_blocktypedefs);
    while (vec_size(parser->_typedefs) != typedefs) {
        ast_delete(vec_last(parser->_typedefs));
        vec_pop(parser->_typedefs);
    }
    util_htdel(vec_last(parser->typedefs));
    vec_pop(parser->typedefs);

    vec_pop(parser->_block_ctx);

    return rv;
}

static void parser_addlocal(parser_t *parser, const char *name, ast_expression *e)
{
    vec_push(parser->_locals, e);
    util_htset(vec_last(parser->variables), name, (void*)e);

    /* corrector */
    correct_add (
         vec_last(parser->correct_variables),
        &vec_last(parser->correct_variables_score),
        name
    );
}

static void parser_addglobal(parser_t *parser, const char *name, ast_expression *e)
{
    vec_push(parser->globals, e);
    util_htset(parser->htglobals, name, e);

    /* corrector */
    correct_add (
         parser->correct_variables[0],
        &parser->correct_variables_score[0],
        name
    );
}

static ast_expression* process_condition(parser_t *parser, ast_expression *cond, bool *_ifnot)
{
    bool       ifnot = false;
    ast_unary *unary;
    ast_expression *prev;

    if (cond->vtype == TYPE_VOID || cond->vtype >= TYPE_VARIANT) {
        char ty[1024];
        ast_type_to_string(cond, ty, sizeof(ty));
        compile_error(ast_ctx(cond), "invalid type for if() condition: %s", ty);
    }

    if (OPTS_FLAG(FALSE_EMPTY_STRINGS) && cond->vtype == TYPE_STRING)
    {
        prev = cond;
        cond = (ast_expression*)ast_unary_new(ast_ctx(cond), INSTR_NOT_S, cond);
        if (!cond) {
            ast_unref(prev);
            parseerror(parser, "internal error: failed to process condition");
            return NULL;
        }
        ifnot = !ifnot;
    }
    else if (OPTS_FLAG(CORRECT_LOGIC) && cond->vtype == TYPE_VECTOR)
    {
        /* vector types need to be cast to true booleans */
        ast_binary *bin = (ast_binary*)cond;
        if (!OPTS_FLAG(PERL_LOGIC) || !ast_istype(cond, ast_binary) || !(bin->op == INSTR_AND || bin->op == INSTR_OR))
        {
            /* in perl-logic, AND and OR take care of the -fcorrect-logic */
            prev = cond;
            cond = (ast_expression*)ast_unary_new(ast_ctx(cond), INSTR_NOT_V, cond);
            if (!cond) {
                ast_unref(prev);
                parseerror(parser, "internal error: failed to process condition");
                return NULL;
            }
            ifnot = !ifnot;
        }
    }

    unary = (ast_unary*)cond;
    while (ast_istype(cond, ast_unary) && unary->op == INSTR_NOT_F)
    {
        cond = unary->operand;
        unary->operand = NULL;
        ast_delete(unary);
        ifnot = !ifnot;
        unary = (ast_unary*)cond;
    }

    if (!cond)
        parseerror(parser, "internal error: failed to process condition");

    if (ifnot) *_ifnot = !*_ifnot;
    return cond;
}

static bool parse_if(parser_t *parser, ast_block *block, ast_expression **out)
{
    ast_ifthen *ifthen;
    ast_expression *cond, *ontrue = NULL, *onfalse = NULL;
    bool ifnot = false;

    lex_ctx ctx = parser_ctx(parser);

    (void)block; /* not touching */

    /* skip the 'if', parse an optional 'not' and check for an opening paren */
    if (!parser_next(parser)) {
        parseerror(parser, "expected condition or 'not'");
        return false;
    }
    if (parser->tok == TOKEN_IDENT && !strcmp(parser_tokval(parser), "not")) {
        ifnot = true;
        if (!parser_next(parser)) {
            parseerror(parser, "expected condition in parenthesis");
            return false;
        }
    }
    if (parser->tok != '(') {
        parseerror(parser, "expected 'if' condition in parenthesis");
        return false;
    }
    /* parse into the expression */
    if (!parser_next(parser)) {
        parseerror(parser, "expected 'if' condition after opening paren");
        return false;
    }
    /* parse the condition */
    cond = parse_expression_leave(parser, false, true, false);
    if (!cond)
        return false;
    /* closing paren */
    if (parser->tok != ')') {
        parseerror(parser, "expected closing paren after 'if' condition");
        ast_unref(cond);
        return false;
    }
    /* parse into the 'then' branch */
    if (!parser_next(parser)) {
        parseerror(parser, "expected statement for on-true branch of 'if'");
        ast_unref(cond);
        return false;
    }
    if (!parse_statement_or_block(parser, &ontrue)) {
        ast_unref(cond);
        return false;
    }
    if (!ontrue)
        ontrue = (ast_expression*)ast_block_new(parser_ctx(parser));
    /* check for an else */
    if (!strcmp(parser_tokval(parser), "else")) {
        /* parse into the 'else' branch */
        if (!parser_next(parser)) {
            parseerror(parser, "expected on-false branch after 'else'");
            ast_delete(ontrue);
            ast_unref(cond);
            return false;
        }
        if (!parse_statement_or_block(parser, &onfalse)) {
            ast_delete(ontrue);
            ast_unref(cond);
            return false;
        }
    }

    cond = process_condition(parser, cond, &ifnot);
    if (!cond) {
        if (ontrue)  ast_delete(ontrue);
        if (onfalse) ast_delete(onfalse);
        return false;
    }

    if (ifnot)
        ifthen = ast_ifthen_new(ctx, cond, onfalse, ontrue);
    else
        ifthen = ast_ifthen_new(ctx, cond, ontrue, onfalse);
    *out = (ast_expression*)ifthen;
    return true;
}

static bool parse_while_go(parser_t *parser, ast_block *block, ast_expression **out);
static bool parse_while(parser_t *parser, ast_block *block, ast_expression **out)
{
    bool rv;
    char *label = NULL;

    /* skip the 'while' and get the body */
    if (!parser_next(parser)) {
        if (OPTS_FLAG(LOOP_LABELS))
            parseerror(parser, "expected loop label or 'while' condition in parenthesis");
        else
            parseerror(parser, "expected 'while' condition in parenthesis");
        return false;
    }

    if (parser->tok == ':') {
        if (!OPTS_FLAG(LOOP_LABELS))
            parseerror(parser, "labeled loops not activated, try using -floop-labels");
        if (!parser_next(parser) || parser->tok != TOKEN_IDENT) {
            parseerror(parser, "expected loop label");
            return false;
        }
        label = util_strdup(parser_tokval(parser));
        if (!parser_next(parser)) {
            mem_d(label);
            parseerror(parser, "expected 'while' condition in parenthesis");
            return false;
        }
    }

    if (parser->tok != '(') {
        parseerror(parser, "expected 'while' condition in parenthesis");
        return false;
    }

    vec_push(parser->breaks, label);
    vec_push(parser->continues, label);

    rv = parse_while_go(parser, block, out);
    if (label)
        mem_d(label);
    if (vec_last(parser->breaks) != label || vec_last(parser->continues) != label) {
        parseerror(parser, "internal error: label stack corrupted");
        rv = false;
        ast_delete(*out);
        *out = NULL;
    }
    else {
        vec_pop(parser->breaks);
        vec_pop(parser->continues);
    }
    return rv;
}

static bool parse_while_go(parser_t *parser, ast_block *block, ast_expression **out)
{
    ast_loop *aloop;
    ast_expression *cond, *ontrue;

    bool ifnot = false;

    lex_ctx ctx = parser_ctx(parser);

    (void)block; /* not touching */

    /* parse into the expression */
    if (!parser_next(parser)) {
        parseerror(parser, "expected 'while' condition after opening paren");
        return false;
    }
    /* parse the condition */
    cond = parse_expression_leave(parser, false, true, false);
    if (!cond)
        return false;
    /* closing paren */
    if (parser->tok != ')') {
        parseerror(parser, "expected closing paren after 'while' condition");
        ast_unref(cond);
        return false;
    }
    /* parse into the 'then' branch */
    if (!parser_next(parser)) {
        parseerror(parser, "expected while-loop body");
        ast_unref(cond);
        return false;
    }
    if (!parse_statement_or_block(parser, &ontrue)) {
        ast_unref(cond);
        return false;
    }

    cond = process_condition(parser, cond, &ifnot);
    if (!cond) {
        ast_unref(ontrue);
        return false;
    }
    aloop = ast_loop_new(ctx, NULL, cond, ifnot, NULL, false, NULL, ontrue);
    *out = (ast_expression*)aloop;
    return true;
}

static bool parse_dowhile_go(parser_t *parser, ast_block *block, ast_expression **out);
static bool parse_dowhile(parser_t *parser, ast_block *block, ast_expression **out)
{
    bool rv;
    char *label = NULL;

    /* skip the 'do' and get the body */
    if (!parser_next(parser)) {
        if (OPTS_FLAG(LOOP_LABELS))
            parseerror(parser, "expected loop label or body");
        else
            parseerror(parser, "expected loop body");
        return false;
    }

    if (parser->tok == ':') {
        if (!OPTS_FLAG(LOOP_LABELS))
            parseerror(parser, "labeled loops not activated, try using -floop-labels");
        if (!parser_next(parser) || parser->tok != TOKEN_IDENT) {
            parseerror(parser, "expected loop label");
            return false;
        }
        label = util_strdup(parser_tokval(parser));
        if (!parser_next(parser)) {
            mem_d(label);
            parseerror(parser, "expected loop body");
            return false;
        }
    }

    vec_push(parser->breaks, label);
    vec_push(parser->continues, label);

    rv = parse_dowhile_go(parser, block, out);
    if (label)
        mem_d(label);
    if (vec_last(parser->breaks) != label || vec_last(parser->continues) != label) {
        parseerror(parser, "internal error: label stack corrupted");
        rv = false;
        ast_delete(*out);
        *out = NULL;
    }
    else {
        vec_pop(parser->breaks);
        vec_pop(parser->continues);
    }
    return rv;
}

static bool parse_dowhile_go(parser_t *parser, ast_block *block, ast_expression **out)
{
    ast_loop *aloop;
    ast_expression *cond, *ontrue;

    bool ifnot = false;

    lex_ctx ctx = parser_ctx(parser);

    (void)block; /* not touching */

    if (!parse_statement_or_block(parser, &ontrue))
        return false;

    /* expect the "while" */
    if (parser->tok != TOKEN_KEYWORD ||
        strcmp(parser_tokval(parser), "while"))
    {
        parseerror(parser, "expected 'while' and condition");
        ast_delete(ontrue);
        return false;
    }

    /* skip the 'while' and check for opening paren */
    if (!parser_next(parser) || parser->tok != '(') {
        parseerror(parser, "expected 'while' condition in parenthesis");
        ast_delete(ontrue);
        return false;
    }
    /* parse into the expression */
    if (!parser_next(parser)) {
        parseerror(parser, "expected 'while' condition after opening paren");
        ast_delete(ontrue);
        return false;
    }
    /* parse the condition */
    cond = parse_expression_leave(parser, false, true, false);
    if (!cond)
        return false;
    /* closing paren */
    if (parser->tok != ')') {
        parseerror(parser, "expected closing paren after 'while' condition");
        ast_delete(ontrue);
        ast_unref(cond);
        return false;
    }
    /* parse on */
    if (!parser_next(parser) || parser->tok != ';') {
        parseerror(parser, "expected semicolon after condition");
        ast_delete(ontrue);
        ast_unref(cond);
        return false;
    }

    if (!parser_next(parser)) {
        parseerror(parser, "parse error");
        ast_delete(ontrue);
        ast_unref(cond);
        return false;
    }

    cond = process_condition(parser, cond, &ifnot);
    if (!cond) {
        ast_delete(ontrue);
        return false;
    }
    aloop = ast_loop_new(ctx, NULL, NULL, false, cond, ifnot, NULL, ontrue);
    *out = (ast_expression*)aloop;
    return true;
}

static bool parse_for_go(parser_t *parser, ast_block *block, ast_expression **out);
static bool parse_for(parser_t *parser, ast_block *block, ast_expression **out)
{
    bool rv;
    char *label = NULL;

    /* skip the 'for' and check for opening paren */
    if (!parser_next(parser)) {
        if (OPTS_FLAG(LOOP_LABELS))
            parseerror(parser, "expected loop label or 'for' expressions in parenthesis");
        else
            parseerror(parser, "expected 'for' expressions in parenthesis");
        return false;
    }

    if (parser->tok == ':') {
        if (!OPTS_FLAG(LOOP_LABELS))
            parseerror(parser, "labeled loops not activated, try using -floop-labels");
        if (!parser_next(parser) || parser->tok != TOKEN_IDENT) {
            parseerror(parser, "expected loop label");
            return false;
        }
        label = util_strdup(parser_tokval(parser));
        if (!parser_next(parser)) {
            mem_d(label);
            parseerror(parser, "expected 'for' expressions in parenthesis");
            return false;
        }
    }

    if (parser->tok != '(') {
        parseerror(parser, "expected 'for' expressions in parenthesis");
        return false;
    }

    vec_push(parser->breaks, label);
    vec_push(parser->continues, label);

    rv = parse_for_go(parser, block, out);
    if (label)
        mem_d(label);
    if (vec_last(parser->breaks) != label || vec_last(parser->continues) != label) {
        parseerror(parser, "internal error: label stack corrupted");
        rv = false;
        ast_delete(*out);
        *out = NULL;
    }
    else {
        vec_pop(parser->breaks);
        vec_pop(parser->continues);
    }
    return rv;
}
static bool parse_for_go(parser_t *parser, ast_block *block, ast_expression **out)
{
    ast_loop       *aloop;
    ast_expression *initexpr, *cond, *increment, *ontrue;
    ast_value      *typevar;

    bool ifnot  = false;

    lex_ctx ctx = parser_ctx(parser);

    parser_enterblock(parser);

    initexpr  = NULL;
    cond      = NULL;
    increment = NULL;
    ontrue    = NULL;

    /* parse into the expression */
    if (!parser_next(parser)) {
        parseerror(parser, "expected 'for' initializer after opening paren");
        goto onerr;
    }

    typevar = NULL;
    if (parser->tok == TOKEN_IDENT)
        typevar = parser_find_typedef(parser, parser_tokval(parser), 0);

    if (typevar || parser->tok == TOKEN_TYPENAME) {
#if 0
        if (OPTS_OPTION_U32(OPTION_STANDARD) != COMPILER_GMQCC) {
            if (parsewarning(parser, WARN_EXTENSIONS,
                             "current standard does not allow variable declarations in for-loop initializers"))
                goto onerr;
        }
#endif
        if (!parse_variable(parser, block, true, CV_VAR, typevar, false, false, 0, NULL))
            goto onerr;
    }
    else if (parser->tok != ';')
    {
        initexpr = parse_expression_leave(parser, false, false, false);
        if (!initexpr)
            goto onerr;
    }

    /* move on to condition */
    if (parser->tok != ';') {
        parseerror(parser, "expected semicolon after for-loop initializer");
        goto onerr;
    }
    if (!parser_next(parser)) {
        parseerror(parser, "expected for-loop condition");
        goto onerr;
    }

    /* parse the condition */
    if (parser->tok != ';') {
        cond = parse_expression_leave(parser, false, true, false);
        if (!cond)
            goto onerr;
    }

    /* move on to incrementor */
    if (parser->tok != ';') {
        parseerror(parser, "expected semicolon after for-loop initializer");
        goto onerr;
    }
    if (!parser_next(parser)) {
        parseerror(parser, "expected for-loop condition");
        goto onerr;
    }

    /* parse the incrementor */
    if (parser->tok != ')') {
        lex_ctx condctx = parser_ctx(parser);
        increment = parse_expression_leave(parser, false, false, false);
        if (!increment)
            goto onerr;
        if (!ast_side_effects(increment)) {
            if (compile_warning(condctx, WARN_EFFECTLESS_STATEMENT, "statement has no effect"))
                goto onerr;
        }
    }

    /* closing paren */
    if (parser->tok != ')') {
        parseerror(parser, "expected closing paren after 'for-loop' incrementor");
        goto onerr;
    }
    /* parse into the 'then' branch */
    if (!parser_next(parser)) {
        parseerror(parser, "expected for-loop body");
        goto onerr;
    }
    if (!parse_statement_or_block(parser, &ontrue))
        goto onerr;

    if (cond) {
        cond = process_condition(parser, cond, &ifnot);
        if (!cond)
            goto onerr;
    }
    aloop = ast_loop_new(ctx, initexpr, cond, ifnot, NULL, false, increment, ontrue);
    *out = (ast_expression*)aloop;

    if (!parser_leaveblock(parser)) {
        ast_delete(aloop);
        return false;
    }
    return true;
onerr:
    if (initexpr)  ast_unref(initexpr);
    if (cond)      ast_unref(cond);
    if (increment) ast_unref(increment);
    (void)!parser_leaveblock(parser);
    return false;
}

static bool parse_return(parser_t *parser, ast_block *block, ast_expression **out)
{
    ast_expression *exp      = NULL;
    ast_expression *var      = NULL;
    ast_return     *ret      = NULL;
    ast_value      *retval   = parser->function->return_value;
    ast_value      *expected = parser->function->vtype;

    lex_ctx ctx = parser_ctx(parser);

    (void)block; /* not touching */

    if (!parser_next(parser)) {
        parseerror(parser, "expected return expression");
        return false;
    }

    /* return assignments */
    if (parser->tok == '=') {
        if (!OPTS_FLAG(RETURN_ASSIGNMENTS)) {
            parseerror(parser, "return assignments not activated, try using -freturn-assigments");
            return false;
        }

        if (type_store_instr[expected->expression.next->vtype] == VINSTR_END) {
            char ty1[1024];
            ast_type_to_string(expected->expression.next, ty1, sizeof(ty1));
            parseerror(parser, "invalid return type: `%s'", ty1);
            return false;
        }

        if (!parser_next(parser)) {
            parseerror(parser, "expected return assignment expression");
            return false;
        }

        if (!(exp = parse_expression_leave(parser, false, false, false)))
            return false;

        /* prepare the return value */
        if (!retval) {
            retval = ast_value_new(ctx, "#LOCAL_RETURN", TYPE_VOID);
            ast_type_adopt(retval, expected->expression.next);
            parser->function->return_value = retval;
        }

        if (!ast_compare_type(exp, (ast_expression*)retval)) {
            char ty1[1024], ty2[1024];
            ast_type_to_string(exp, ty1, sizeof(ty1));
            ast_type_to_string(&retval->expression, ty2, sizeof(ty2));
            parseerror(parser, "invalid type for return value: `%s', expected `%s'", ty1, ty2);
        }

        /* store to 'return' local variable */
        var = (ast_expression*)ast_store_new(
            ctx,
            type_store_instr[expected->expression.next->vtype],
            (ast_expression*)retval, exp);

        if (!var) {
            ast_unref(exp);
            return false;
        }

        if (parser->tok != ';')
            parseerror(parser, "missing semicolon after return assignment");
        else if (!parser_next(parser))
            parseerror(parser, "parse error after return assignment");

        *out = var;
        return true;
    }

    if (parser->tok != ';') {
        exp = parse_expression(parser, false, false);
        if (!exp)
            return false;

        if (exp->vtype != TYPE_NIL &&
            exp->vtype != ((ast_expression*)expected)->next->vtype)
        {
            parseerror(parser, "return with invalid expression");
        }

        ret = ast_return_new(ctx, exp);
        if (!ret) {
            ast_unref(exp);
            return false;
        }
    } else {
        if (!parser_next(parser))
            parseerror(parser, "parse error");

        if (!retval && expected->expression.next->vtype != TYPE_VOID)
        {
            (void)!parsewarning(parser, WARN_MISSING_RETURN_VALUES, "return without value");
        }
        ret = ast_return_new(ctx, (ast_expression*)retval);
    }
    *out = (ast_expression*)ret;
    return true;
}

static bool parse_break_continue(parser_t *parser, ast_block *block, ast_expression **out, bool is_continue)
{
    size_t       i;
    unsigned int levels = 0;
    lex_ctx      ctx = parser_ctx(parser);
    const char **loops = (is_continue ? parser->continues : parser->breaks);

    (void)block; /* not touching */
    if (!parser_next(parser)) {
        parseerror(parser, "expected semicolon or loop label");
        return false;
    }

    if (!vec_size(loops)) {
        if (is_continue)
            parseerror(parser, "`continue` can only be used inside loops");
        else
            parseerror(parser, "`break` can only be used inside loops or switches");
    }

    if (parser->tok == TOKEN_IDENT) {
        if (!OPTS_FLAG(LOOP_LABELS))
            parseerror(parser, "labeled loops not activated, try using -floop-labels");
        i = vec_size(loops);
        while (i--) {
            if (loops[i] && !strcmp(loops[i], parser_tokval(parser)))
                break;
            if (!i) {
                parseerror(parser, "no such loop to %s: `%s`",
                           (is_continue ? "continue" : "break out of"),
                           parser_tokval(parser));
                return false;
            }
            ++levels;
        }
        if (!parser_next(parser)) {
            parseerror(parser, "expected semicolon");
            return false;
        }
    }

    if (parser->tok != ';') {
        parseerror(parser, "expected semicolon");
        return false;
    }

    if (!parser_next(parser))
        parseerror(parser, "parse error");

    *out = (ast_expression*)ast_breakcont_new(ctx, is_continue, levels);
    return true;
}

/* returns true when it was a variable qualifier, false otherwise!
 * on error, cvq is set to CV_WRONG
 */
static bool parse_qualifiers(parser_t *parser, bool with_local, int *cvq, bool *noref, bool *is_static, uint32_t *_flags, char **message)
{
    bool had_const    = false;
    bool had_var      = false;
    bool had_noref    = false;
    bool had_attrib   = false;
    bool had_static   = false;
    uint32_t flags    = 0;

    *cvq = CV_NONE;
    for (;;) {
        if (parser->tok == TOKEN_ATTRIBUTE_OPEN) {
            had_attrib = true;
            /* parse an attribute */
            if (!parser_next(parser)) {
                parseerror(parser, "expected attribute after `[[`");
                *cvq = CV_WRONG;
                return false;
            }
            if (!strcmp(parser_tokval(parser), "noreturn")) {
                flags |= AST_FLAG_NORETURN;
                if (!parser_next(parser) || parser->tok != TOKEN_ATTRIBUTE_CLOSE) {
                    parseerror(parser, "`noreturn` attribute has no parameters, expected `]]`");
                    *cvq = CV_WRONG;
                    return false;
                }
            }
            else if (!strcmp(parser_tokval(parser), "noref")) {
                had_noref = true;
                if (!parser_next(parser) || parser->tok != TOKEN_ATTRIBUTE_CLOSE) {
                    parseerror(parser, "`noref` attribute has no parameters, expected `]]`");
                    *cvq = CV_WRONG;
                    return false;
                }
            }
            else if (!strcmp(parser_tokval(parser), "inline")) {
                flags |= AST_FLAG_INLINE;
                if (!parser_next(parser) || parser->tok != TOKEN_ATTRIBUTE_CLOSE) {
                    parseerror(parser, "`noref` attribute has no parameters, expected `]]`");
                    *cvq = CV_WRONG;
                    return false;
                }
            }
            else if (!strcmp(parser_tokval(parser), "alias") && !(flags & AST_FLAG_ALIAS)) {
                flags   |= AST_FLAG_ALIAS;
                *message = NULL;

                if (!parser_next(parser)) {
                    parseerror(parser, "parse error in attribute");
                    goto argerr;
                }

                if (parser->tok == '(') {
                    if (!parser_next(parser) || parser->tok != TOKEN_STRINGCONST) {
                        parseerror(parser, "`alias` attribute missing parameter");
                        goto argerr;
                    }

                    *message = util_strdup(parser_tokval(parser));

                    if (!parser_next(parser)) {
                        parseerror(parser, "parse error in attribute");
                        goto argerr;
                    }

                    if (parser->tok != ')') {
                        parseerror(parser, "`alias` attribute expected `)` after parameter");
                        goto argerr;
                    }

                    if (!parser_next(parser)) {
                        parseerror(parser, "parse error in attribute");
                        goto argerr;
                    }
                }

                if (parser->tok != TOKEN_ATTRIBUTE_CLOSE) {
                    parseerror(parser, "`alias` attribute expected `]]`");
                    goto argerr;
                }
            }
            else if (!strcmp(parser_tokval(parser), "deprecated") && !(flags & AST_FLAG_DEPRECATED)) {
                flags   |= AST_FLAG_DEPRECATED;
                *message = NULL;

                if (!parser_next(parser)) {
                    parseerror(parser, "parse error in attribute");
                    goto argerr;
                }

                if (parser->tok == '(') {
                    if (!parser_next(parser) || parser->tok != TOKEN_STRINGCONST) {
                        parseerror(parser, "`deprecated` attribute missing parameter");
                        goto argerr;
                    }

                    *message = util_strdup(parser_tokval(parser));

                    if (!parser_next(parser)) {
                        parseerror(parser, "parse error in attribute");
                        goto argerr;
                    }

                    if(parser->tok != ')') {
                        parseerror(parser, "`deprecated` attribute expected `)` after parameter");
                        goto argerr;
                    }

                    if (!parser_next(parser)) {
                        parseerror(parser, "parse error in attribute");
                        goto argerr;
                    }
                }
                /* no message */
                if (parser->tok != TOKEN_ATTRIBUTE_CLOSE) {
                    parseerror(parser, "`deprecated` attribute expected `]]`");

                    argerr: /* ugly */
                    if (*message) mem_d(*message);
                    *message = NULL;
                    *cvq     = CV_WRONG;
                    return false;
                }
            }
            else
            {
                /* Skip tokens until we hit a ]] */
                (void)!parsewarning(parser, WARN_UNKNOWN_ATTRIBUTE, "unknown attribute starting with `%s`", parser_tokval(parser));
                while (parser->tok != TOKEN_ATTRIBUTE_CLOSE) {
                    if (!parser_next(parser)) {
                        parseerror(parser, "error inside attribute");
                        *cvq = CV_WRONG;
                        return false;
                    }
                }
            }
        }
        else if (with_local && !strcmp(parser_tokval(parser), "static"))
            had_static = true;
        else if (!strcmp(parser_tokval(parser), "const"))
            had_const = true;
        else if (!strcmp(parser_tokval(parser), "var"))
            had_var = true;
        else if (with_local && !strcmp(parser_tokval(parser), "local"))
            had_var = true;
        else if (!strcmp(parser_tokval(parser), "noref"))
            had_noref = true;
        else if (!had_const && !had_var && !had_noref && !had_attrib && !had_static && !flags) {
            return false;
        }
        else
            break;
        if (!parser_next(parser))
            goto onerr;
    }
    if (had_const)
        *cvq = CV_CONST;
    else if (had_var)
        *cvq = CV_VAR;
    else
        *cvq = CV_NONE;
    *noref     = had_noref;
    *is_static = had_static;
    *_flags    = flags;
    return true;
onerr:
    parseerror(parser, "parse error after variable qualifier");
    *cvq = CV_WRONG;
    return true;
}

static bool parse_switch_go(parser_t *parser, ast_block *block, ast_expression **out);
static bool parse_switch(parser_t *parser, ast_block *block, ast_expression **out)
{
    bool rv;
    char *label = NULL;

    /* skip the 'while' and get the body */
    if (!parser_next(parser)) {
        if (OPTS_FLAG(LOOP_LABELS))
            parseerror(parser, "expected loop label or 'switch' operand in parenthesis");
        else
            parseerror(parser, "expected 'switch' operand in parenthesis");
        return false;
    }

    if (parser->tok == ':') {
        if (!OPTS_FLAG(LOOP_LABELS))
            parseerror(parser, "labeled loops not activated, try using -floop-labels");
        if (!parser_next(parser) || parser->tok != TOKEN_IDENT) {
            parseerror(parser, "expected loop label");
            return false;
        }
        label = util_strdup(parser_tokval(parser));
        if (!parser_next(parser)) {
            mem_d(label);
            parseerror(parser, "expected 'switch' operand in parenthesis");
            return false;
        }
    }

    if (parser->tok != '(') {
        parseerror(parser, "expected 'switch' operand in parenthesis");
        return false;
    }

    vec_push(parser->breaks, label);

    rv = parse_switch_go(parser, block, out);
    if (label)
        mem_d(label);
    if (vec_last(parser->breaks) != label) {
        parseerror(parser, "internal error: label stack corrupted");
        rv = false;
        ast_delete(*out);
        *out = NULL;
    }
    else {
        vec_pop(parser->breaks);
    }
    return rv;
}

static bool parse_switch_go(parser_t *parser, ast_block *block, ast_expression **out)
{
    ast_expression *operand;
    ast_value      *opval;
    ast_value      *typevar;
    ast_switch     *switchnode;
    ast_switch_case swcase;

    int  cvq;
    bool noref, is_static;
    uint32_t qflags = 0;

    lex_ctx ctx = parser_ctx(parser);

    (void)block; /* not touching */
    (void)opval;

    /* parse into the expression */
    if (!parser_next(parser)) {
        parseerror(parser, "expected switch operand");
        return false;
    }
    /* parse the operand */
    operand = parse_expression_leave(parser, false, false, false);
    if (!operand)
        return false;

    switchnode = ast_switch_new(ctx, operand);

    /* closing paren */
    if (parser->tok != ')') {
        ast_delete(switchnode);
        parseerror(parser, "expected closing paren after 'switch' operand");
        return false;
    }

    /* parse over the opening paren */
    if (!parser_next(parser) || parser->tok != '{') {
        ast_delete(switchnode);
        parseerror(parser, "expected list of cases");
        return false;
    }

    if (!parser_next(parser)) {
        ast_delete(switchnode);
        parseerror(parser, "expected 'case' or 'default'");
        return false;
    }

    /* new block; allow some variables to be declared here */
    parser_enterblock(parser);
    while (true) {
        typevar = NULL;
        if (parser->tok == TOKEN_IDENT)
            typevar = parser_find_typedef(parser, parser_tokval(parser), 0);
        if (typevar || parser->tok == TOKEN_TYPENAME) {
            if (!parse_variable(parser, block, false, CV_NONE, typevar, false, false, 0, NULL)) {
                ast_delete(switchnode);
                return false;
            }
            continue;
        }
        if (parse_qualifiers(parser, true, &cvq, &noref, &is_static, &qflags, NULL))
        {
            if (cvq == CV_WRONG) {
                ast_delete(switchnode);
                return false;
            }
            if (!parse_variable(parser, block, false, cvq, NULL, noref, is_static, qflags, NULL)) {
                ast_delete(switchnode);
                return false;
            }
            continue;
        }
        break;
    }

    /* case list! */
    while (parser->tok != '}') {
        ast_block *caseblock;

        if (!strcmp(parser_tokval(parser), "case")) {
            if (!parser_next(parser)) {
                ast_delete(switchnode);
                parseerror(parser, "expected expression for case");
                return false;
            }
            swcase.value = parse_expression_leave(parser, false, false, false);
            if (!swcase.value) {
                ast_delete(switchnode);
                parseerror(parser, "expected expression for case");
                return false;
            }
            if (!OPTS_FLAG(RELAXED_SWITCH)) {
                if (!ast_istype(swcase.value, ast_value)) { /* || ((ast_value*)swcase.value)->cvq != CV_CONST) { */
                    parseerror(parser, "case on non-constant values need to be explicitly enabled via -frelaxed-switch");
                    ast_unref(operand);
                    return false;
                }
            }
        }
        else if (!strcmp(parser_tokval(parser), "default")) {
            swcase.value = NULL;
            if (!parser_next(parser)) {
                ast_delete(switchnode);
                parseerror(parser, "expected colon");
                return false;
            }
        }
        else {
            ast_delete(switchnode);
            parseerror(parser, "expected 'case' or 'default'");
            return false;
        }

        /* Now the colon and body */
        if (parser->tok != ':') {
            if (swcase.value) ast_unref(swcase.value);
            ast_delete(switchnode);
            parseerror(parser, "expected colon");
            return false;
        }

        if (!parser_next(parser)) {
            if (swcase.value) ast_unref(swcase.value);
            ast_delete(switchnode);
            parseerror(parser, "expected statements or case");
            return false;
        }
        caseblock = ast_block_new(parser_ctx(parser));
        if (!caseblock) {
            if (swcase.value) ast_unref(swcase.value);
            ast_delete(switchnode);
            return false;
        }
        swcase.code = (ast_expression*)caseblock;
        vec_push(switchnode->cases, swcase);
        while (true) {
            ast_expression *expr;
            if (parser->tok == '}')
                break;
            if (parser->tok == TOKEN_KEYWORD) {
                if (!strcmp(parser_tokval(parser), "case") ||
                    !strcmp(parser_tokval(parser), "default"))
                {
                    break;
                }
            }
            if (!parse_statement(parser, caseblock, &expr, true)) {
                ast_delete(switchnode);
                return false;
            }
            if (!expr)
                continue;
            if (!ast_block_add_expr(caseblock, expr)) {
                ast_delete(switchnode);
                return false;
            }
        }
    }

    parser_leaveblock(parser);

    /* closing paren */
    if (parser->tok != '}') {
        ast_delete(switchnode);
        parseerror(parser, "expected closing paren of case list");
        return false;
    }
    if (!parser_next(parser)) {
        ast_delete(switchnode);
        parseerror(parser, "parse error after switch");
        return false;
    }
    *out = (ast_expression*)switchnode;
    return true;
}

/* parse computed goto sides */
static ast_expression *parse_goto_computed(parser_t *parser, ast_expression **side) {
    ast_expression *on_true;
    ast_expression *on_false;
    ast_expression *cond;

    if (!*side)
        return NULL;

    if (ast_istype(*side, ast_ternary)) {
        ast_ternary *tern = (ast_ternary*)*side;
        on_true  = parse_goto_computed(parser, &tern->on_true);
        on_false = parse_goto_computed(parser, &tern->on_false);

        if (!on_true || !on_false) {
            parseerror(parser, "expected label or expression in ternary");
            if (on_true) ast_unref(on_true);
            if (on_false) ast_unref(on_false);
            return NULL;
        }

        cond = tern->cond;
        tern->cond = NULL;
        ast_delete(tern);
        *side = NULL;
        return (ast_expression*)ast_ifthen_new(parser_ctx(parser), cond, on_true, on_false);
    } else if (ast_istype(*side, ast_label)) {
        ast_goto *gt = ast_goto_new(parser_ctx(parser), ((ast_label*)*side)->name);
        ast_goto_set_label(gt, ((ast_label*)*side));
        *side = NULL;
        return (ast_expression*)gt;
    }
    return NULL;
}

static bool parse_goto(parser_t *parser, ast_expression **out)
{
    ast_goto       *gt = NULL;
    ast_expression *lbl;

    if (!parser_next(parser))
        return false;

    if (parser->tok != TOKEN_IDENT) {
        ast_expression *expression;

        /* could be an expression i.e computed goto :-) */
        if (parser->tok != '(') {
            parseerror(parser, "expected label name after `goto`");
            return false;
        }

        /* failed to parse expression for goto */
        if (!(expression = parse_expression(parser, false, true)) ||
            !(*out = parse_goto_computed(parser, &expression))) {
            parseerror(parser, "invalid goto expression");
            ast_unref(expression);
            return false;
        }

        return true;
    }

    /* not computed goto */
    gt = ast_goto_new(parser_ctx(parser), parser_tokval(parser));
    lbl = parser_find_label(parser, gt->name);
    if (lbl) {
        if (!ast_istype(lbl, ast_label)) {
            parseerror(parser, "internal error: label is not an ast_label");
            ast_delete(gt);
            return false;
        }
        ast_goto_set_label(gt, (ast_label*)lbl);
    }
    else
        vec_push(parser->gotos, gt);

    if (!parser_next(parser) || parser->tok != ';') {
        parseerror(parser, "semicolon expected after goto label");
        return false;
    }
    if (!parser_next(parser)) {
        parseerror(parser, "parse error after goto");
        return false;
    }

    *out = (ast_expression*)gt;
    return true;
}

static bool parse_skipwhite(parser_t *parser)
{
    do {
        if (!parser_next(parser))
            return false;
    } while (parser->tok == TOKEN_WHITE && parser->tok < TOKEN_ERROR);
    return parser->tok < TOKEN_ERROR;
}

static bool parse_eol(parser_t *parser)
{
    if (!parse_skipwhite(parser))
        return false;
    return parser->tok == TOKEN_EOL;
}

static bool parse_pragma_do(parser_t *parser)
{
    if (!parser_next(parser) ||
        parser->tok != TOKEN_IDENT ||
        strcmp(parser_tokval(parser), "pragma"))
    {
        parseerror(parser, "expected `pragma` keyword after `#`, got `%s`", parser_tokval(parser));
        return false;
    }
    if (!parse_skipwhite(parser) || parser->tok != TOKEN_IDENT) {
        parseerror(parser, "expected pragma, got `%s`", parser_tokval(parser));
        return false;
    }

    if (!strcmp(parser_tokval(parser), "noref")) {
        if (!parse_skipwhite(parser) || parser->tok != TOKEN_INTCONST) {
            parseerror(parser, "`noref` pragma requires an argument: 0 or 1");
            return false;
        }
        parser->noref = !!parser_token(parser)->constval.i;
        if (!parse_eol(parser)) {
            parseerror(parser, "parse error after `noref` pragma");
            return false;
        }
    }
    else
    {
        (void)!parsewarning(parser, WARN_UNKNOWN_PRAGMAS, "ignoring #pragma %s", parser_tokval(parser));
        return false;
    }

    return true;
}

static bool parse_pragma(parser_t *parser)
{
    bool rv;
    parser->lex->flags.preprocessing = true;
    parser->lex->flags.mergelines = true;
    rv = parse_pragma_do(parser);
    if (parser->tok != TOKEN_EOL) {
        parseerror(parser, "junk after pragma");
        rv = false;
    }
    parser->lex->flags.preprocessing = false;
    parser->lex->flags.mergelines = false;
    if (!parser_next(parser)) {
        parseerror(parser, "parse error after pragma");
        rv = false;
    }
    return rv;
}

static bool parse_statement(parser_t *parser, ast_block *block, ast_expression **out, bool allow_cases)
{
    bool       noref, is_static;
    int        cvq     = CV_NONE;
    uint32_t   qflags  = 0;
    ast_value *typevar = NULL;
    char      *vstring = NULL;

    *out = NULL;

    if (parser->tok == TOKEN_IDENT)
        typevar = parser_find_typedef(parser, parser_tokval(parser), 0);

    if (typevar || parser->tok == TOKEN_TYPENAME || parser->tok == '.')
    {
        /* local variable */
        if (!block) {
            parseerror(parser, "cannot declare a variable from here");
            return false;
        }
        if (OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC) {
            if (parsewarning(parser, WARN_EXTENSIONS, "missing 'local' keyword when declaring a local variable"))
                return false;
        }
        if (!parse_variable(parser, block, false, CV_NONE, typevar, false, false, 0, NULL))
            return false;
        return true;
    }
    else if (parse_qualifiers(parser, !!block, &cvq, &noref, &is_static, &qflags, &vstring))
    {
        if (cvq == CV_WRONG)
            return false;
        return parse_variable(parser, block, true, cvq, NULL, noref, is_static, qflags, vstring);
    }
    else if (parser->tok == TOKEN_KEYWORD)
    {
        if (!strcmp(parser_tokval(parser), "__builtin_debug_printtype"))
        {
            char ty[1024];
            ast_value *tdef;

            if (!parser_next(parser)) {
                parseerror(parser, "parse error after __builtin_debug_printtype");
                return false;
            }

            if (parser->tok == TOKEN_IDENT && (tdef = parser_find_typedef(parser, parser_tokval(parser), 0)))
            {
                ast_type_to_string((ast_expression*)tdef, ty, sizeof(ty));
                con_out("__builtin_debug_printtype: `%s`=`%s`\n", tdef->name, ty);
                if (!parser_next(parser)) {
                    parseerror(parser, "parse error after __builtin_debug_printtype typename argument");
                    return false;
                }
            }
            else
            {
                if (!parse_statement(parser, block, out, allow_cases))
                    return false;
                if (!*out)
                    con_out("__builtin_debug_printtype: got no output node\n");
                else
                {
                    ast_type_to_string(*out, ty, sizeof(ty));
                    con_out("__builtin_debug_printtype: `%s`\n", ty);
                }
            }
            return true;
        }
        else if (!strcmp(parser_tokval(parser), "return"))
        {
            return parse_return(parser, block, out);
        }
        else if (!strcmp(parser_tokval(parser), "if"))
        {
            return parse_if(parser, block, out);
        }
        else if (!strcmp(parser_tokval(parser), "while"))
        {
            return parse_while(parser, block, out);
        }
        else if (!strcmp(parser_tokval(parser), "do"))
        {
            return parse_dowhile(parser, block, out);
        }
        else if (!strcmp(parser_tokval(parser), "for"))
        {
            if (OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC) {
                if (parsewarning(parser, WARN_EXTENSIONS, "for loops are not recognized in the original Quake C standard, to enable try an alternate standard --std=?"))
                    return false;
            }
            return parse_for(parser, block, out);
        }
        else if (!strcmp(parser_tokval(parser), "break"))
        {
            return parse_break_continue(parser, block, out, false);
        }
        else if (!strcmp(parser_tokval(parser), "continue"))
        {
            return parse_break_continue(parser, block, out, true);
        }
        else if (!strcmp(parser_tokval(parser), "switch"))
        {
            return parse_switch(parser, block, out);
        }
        else if (!strcmp(parser_tokval(parser), "case") ||
                 !strcmp(parser_tokval(parser), "default"))
        {
            if (!allow_cases) {
                parseerror(parser, "unexpected 'case' label");
                return false;
            }
            return true;
        }
        else if (!strcmp(parser_tokval(parser), "goto"))
        {
            return parse_goto(parser, out);
        }
        else if (!strcmp(parser_tokval(parser), "typedef"))
        {
            if (!parser_next(parser)) {
                parseerror(parser, "expected type definition after 'typedef'");
                return false;
            }
            return parse_typedef(parser);
        }
        parseerror(parser, "Unexpected keyword: `%s'", parser_tokval(parser));
        return false;
    }
    else if (parser->tok == '{')
    {
        ast_block *inner;
        inner = parse_block(parser);
        if (!inner)
            return false;
        *out = (ast_expression*)inner;
        return true;
    }
    else if (parser->tok == ':')
    {
        size_t i;
        ast_label *label;
        if (!parser_next(parser)) {
            parseerror(parser, "expected label name");
            return false;
        }
        if (parser->tok != TOKEN_IDENT) {
            parseerror(parser, "label must be an identifier");
            return false;
        }
        label = (ast_label*)parser_find_label(parser, parser_tokval(parser));
        if (label) {
            if (!label->undefined) {
                parseerror(parser, "label `%s` already defined", label->name);
                return false;
            }
            label->undefined = false;
        }
        else {
            label = ast_label_new(parser_ctx(parser), parser_tokval(parser), false);
            vec_push(parser->labels, label);
        }
        *out = (ast_expression*)label;
        if (!parser_next(parser)) {
            parseerror(parser, "parse error after label");
            return false;
        }
        for (i = 0; i < vec_size(parser->gotos); ++i) {
            if (!strcmp(parser->gotos[i]->name, label->name)) {
                ast_goto_set_label(parser->gotos[i], label);
                vec_remove(parser->gotos, i, 1);
                --i;
            }
        }
        return true;
    }
    else if (parser->tok == ';')
    {
        if (!parser_next(parser)) {
            parseerror(parser, "parse error after empty statement");
            return false;
        }
        return true;
    }
    else
    {
        lex_ctx ctx = parser_ctx(parser);
        ast_expression *exp = parse_expression(parser, false, false);
        if (!exp)
            return false;
        *out = exp;
        if (!ast_side_effects(exp)) {
            if (compile_warning(ctx, WARN_EFFECTLESS_STATEMENT, "statement has no effect"))
                return false;
        }
        return true;
    }
}

static bool parse_enum(parser_t *parser)
{
    bool        flag = false;
    bool        reverse = false;
    qcfloat     num = 0;
    ast_value **values = NULL;
    ast_value  *var = NULL;
    ast_value  *asvalue;

    ast_expression *old;

    if (!parser_next(parser) || (parser->tok != '{' && parser->tok != ':')) {
        parseerror(parser, "expected `{` or `:` after `enum` keyword");
        return false;
    }

    /* enumeration attributes (can add more later) */
    if (parser->tok == ':') {
        if (!parser_next(parser) || parser->tok != TOKEN_IDENT){
            parseerror(parser, "expected `flag` or `reverse` for enumeration attribute");
            return false;
        }

        /* attributes? */
        if (!strcmp(parser_tokval(parser), "flag")) {
            num  = 1;
            flag = true;
        }
        else if (!strcmp(parser_tokval(parser), "reverse")) {
            reverse = true;
        }
        else {
            parseerror(parser, "invalid attribute `%s` for enumeration", parser_tokval(parser));
            return false;
        }

        if (!parser_next(parser) || parser->tok != '{') {
            parseerror(parser, "expected `{` after enum attribute ");
            return false;
        }
    }

    while (true) {
        if (!parser_next(parser) || parser->tok != TOKEN_IDENT) {
            if (parser->tok == '}') {
                /* allow an empty enum */
                break;
            }
            parseerror(parser, "expected identifier or `}`");
            goto onerror;
        }

        old = parser_find_field(parser, parser_tokval(parser));
        if (!old)
            old = parser_find_global(parser, parser_tokval(parser));
        if (old) {
            parseerror(parser, "value `%s` has already been declared here: %s:%i",
                       parser_tokval(parser), ast_ctx(old).file, ast_ctx(old).line);
            goto onerror;
        }

        var = ast_value_new(parser_ctx(parser), parser_tokval(parser), TYPE_FLOAT);
        vec_push(values, var);
        var->cvq             = CV_CONST;
        var->hasvalue        = true;

        /* for flagged enumerations increment in POTs of TWO */
        var->constval.vfloat = (flag) ? (num *= 2) : (num ++);
        parser_addglobal(parser, var->name, (ast_expression*)var);

        if (!parser_next(parser)) {
            parseerror(parser, "expected `=`, `}` or comma after identifier");
            goto onerror;
        }

        if (parser->tok == ',')
            continue;
        if (parser->tok == '}')
            break;
        if (parser->tok != '=') {
            parseerror(parser, "expected `=`, `}` or comma after identifier");
            goto onerror;
        }

        if (!parser_next(parser)) {
            parseerror(parser, "expected expression after `=`");
            goto onerror;
        }

        /* We got a value! */
        old = parse_expression_leave(parser, true, false, false);
        asvalue = (ast_value*)old;
        if (!ast_istype(old, ast_value) || asvalue->cvq != CV_CONST || !asvalue->hasvalue) {
            compile_error(ast_ctx(var), "constant value or expression expected");
            goto onerror;
        }
        num = (var->constval.vfloat = asvalue->constval.vfloat) + 1;

        if (parser->tok == '}')
            break;
        if (parser->tok != ',') {
            parseerror(parser, "expected `}` or comma after expression");
            goto onerror;
        }
    }

    /* patch them all (for reversed attribute) */
    if (reverse) {
        size_t i;
        for (i = 0; i < vec_size(values); i++)
            values[i]->constval.vfloat = vec_size(values) - i - 1;
    }

    if (parser->tok != '}') {
        parseerror(parser, "internal error: breaking without `}`");
        goto onerror;
    }

    if (!parser_next(parser) || parser->tok != ';') {
        parseerror(parser, "expected semicolon after enumeration");
        goto onerror;
    }

    if (!parser_next(parser)) {
        parseerror(parser, "parse error after enumeration");
        goto onerror;
    }

    vec_free(values);
    return true;

onerror:
    vec_free(values);
    return false;
}

static bool parse_block_into(parser_t *parser, ast_block *block)
{
    bool   retval = true;

    parser_enterblock(parser);

    if (!parser_next(parser)) { /* skip the '{' */
        parseerror(parser, "expected function body");
        goto cleanup;
    }

    while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
    {
        ast_expression *expr = NULL;
        if (parser->tok == '}')
            break;

        if (!parse_statement(parser, block, &expr, false)) {
            /* parseerror(parser, "parse error"); */
            block = NULL;
            goto cleanup;
        }
        if (!expr)
            continue;
        if (!ast_block_add_expr(block, expr)) {
            ast_delete(block);
            block = NULL;
            goto cleanup;
        }
    }

    if (parser->tok != '}') {
        block = NULL;
    } else {
        (void)parser_next(parser);
    }

cleanup:
    if (!parser_leaveblock(parser))
        retval = false;
    return retval && !!block;
}

static ast_block* parse_block(parser_t *parser)
{
    ast_block *block;
    block = ast_block_new(parser_ctx(parser));
    if (!block)
        return NULL;
    if (!parse_block_into(parser, block)) {
        ast_block_delete(block);
        return NULL;
    }
    return block;
}

static bool parse_statement_or_block(parser_t *parser, ast_expression **out)
{
    if (parser->tok == '{') {
        *out = (ast_expression*)parse_block(parser);
        return !!*out;
    }
    return parse_statement(parser, NULL, out, false);
}

static bool create_vector_members(ast_value *var, ast_member **me)
{
    size_t i;
    size_t len = strlen(var->name);

    for (i = 0; i < 3; ++i) {
        char *name = (char*)mem_a(len+3);
        memcpy(name, var->name, len);
        name[len+0] = '_';
        name[len+1] = 'x'+i;
        name[len+2] = 0;
        me[i] = ast_member_new(ast_ctx(var), (ast_expression*)var, i, name);
        mem_d(name);
        if (!me[i])
            break;
    }
    if (i == 3)
        return true;

    /* unroll */
    do { ast_member_delete(me[--i]); } while(i);
    return false;
}

static bool parse_function_body(parser_t *parser, ast_value *var)
{
    ast_block      *block = NULL;
    ast_function   *func;
    ast_function   *old;
    size_t          parami;

    ast_expression *framenum  = NULL;
    ast_expression *nextthink = NULL;
    /* None of the following have to be deleted */
    ast_expression *fld_think = NULL, *fld_nextthink = NULL, *fld_frame = NULL;
    ast_expression *gbl_time = NULL, *gbl_self = NULL;
    bool            has_frame_think;

    bool retval = true;

    has_frame_think = false;
    old = parser->function;

    if (var->expression.flags & AST_FLAG_ALIAS) {
        parseerror(parser, "function aliases cannot have bodies");
        return false;
    }

    if (vec_size(parser->gotos) || vec_size(parser->labels)) {
        parseerror(parser, "gotos/labels leaking");
        return false;
    }

    if (!OPTS_FLAG(VARIADIC_ARGS) && var->expression.flags & AST_FLAG_VARIADIC) {
        if (parsewarning(parser, WARN_VARIADIC_FUNCTION,
                         "variadic function with implementation will not be able to access additional parameters (try -fvariadic-args)"))
        {
            return false;
        }
    }

    if (parser->tok == '[') {
        /* got a frame definition: [ framenum, nextthink ]
         * this translates to:
         * self.frame = framenum;
         * self.nextthink = time + 0.1;
         * self.think = nextthink;
         */
        nextthink = NULL;

        fld_think     = parser_find_field(parser, "think");
        fld_nextthink = parser_find_field(parser, "nextthink");
        fld_frame     = parser_find_field(parser, "frame");
        if (!fld_think || !fld_nextthink || !fld_frame) {
            parseerror(parser, "cannot use [frame,think] notation without the required fields");
            parseerror(parser, "please declare the following entityfields: `frame`, `think`, `nextthink`");
            return false;
        }
        gbl_time      = parser_find_global(parser, "time");
        gbl_self      = parser_find_global(parser, "self");
        if (!gbl_time || !gbl_self) {
            parseerror(parser, "cannot use [frame,think] notation without the required globals");
            parseerror(parser, "please declare the following globals: `time`, `self`");
            return false;
        }

        if (!parser_next(parser))
            return false;

        framenum = parse_expression_leave(parser, true, false, false);
        if (!framenum) {
            parseerror(parser, "expected a framenumber constant in[frame,think] notation");
            return false;
        }
        if (!ast_istype(framenum, ast_value) || !( (ast_value*)framenum )->hasvalue) {
            ast_unref(framenum);
            parseerror(parser, "framenumber in [frame,think] notation must be a constant");
            return false;
        }

        if (parser->tok != ',') {
            ast_unref(framenum);
            parseerror(parser, "expected comma after frame number in [frame,think] notation");
            parseerror(parser, "Got a %i\n", parser->tok);
            return false;
        }

        if (!parser_next(parser)) {
            ast_unref(framenum);
            return false;
        }

        if (parser->tok == TOKEN_IDENT && !parser_find_var(parser, parser_tokval(parser)))
        {
            /* qc allows the use of not-yet-declared functions here
             * - this automatically creates a prototype */
            ast_value      *thinkfunc;
            ast_expression *functype = fld_think->next;

            thinkfunc = ast_value_new(parser_ctx(parser), parser_tokval(parser), functype->vtype);
            if (!thinkfunc) { /* || !ast_type_adopt(thinkfunc, functype)*/
                ast_unref(framenum);
                parseerror(parser, "failed to create implicit prototype for `%s`", parser_tokval(parser));
                return false;
            }
            ast_type_adopt(thinkfunc, functype);

            if (!parser_next(parser)) {
                ast_unref(framenum);
                ast_delete(thinkfunc);
                return false;
            }

            parser_addglobal(parser, thinkfunc->name, (ast_expression*)thinkfunc);

            nextthink = (ast_expression*)thinkfunc;

        } else {
            nextthink = parse_expression_leave(parser, true, false, false);
            if (!nextthink) {
                ast_unref(framenum);
                parseerror(parser, "expected a think-function in [frame,think] notation");
                return false;
            }
        }

        if (!ast_istype(nextthink, ast_value)) {
            parseerror(parser, "think-function in [frame,think] notation must be a constant");
            retval = false;
        }

        if (retval && parser->tok != ']') {
            parseerror(parser, "expected closing `]` for [frame,think] notation");
            retval = false;
        }

        if (retval && !parser_next(parser)) {
            retval = false;
        }

        if (retval && parser->tok != '{') {
            parseerror(parser, "a function body has to be declared after a [frame,think] declaration");
            retval = false;
        }

        if (!retval) {
            ast_unref(nextthink);
            ast_unref(framenum);
            return false;
        }

        has_frame_think = true;
    }

    block = ast_block_new(parser_ctx(parser));
    if (!block) {
        parseerror(parser, "failed to allocate block");
        if (has_frame_think) {
            ast_unref(nextthink);
            ast_unref(framenum);
        }
        return false;
    }

    if (has_frame_think) {
        lex_ctx ctx;
        ast_expression *self_frame;
        ast_expression *self_nextthink;
        ast_expression *self_think;
        ast_expression *time_plus_1;
        ast_store *store_frame;
        ast_store *store_nextthink;
        ast_store *store_think;

        ctx = parser_ctx(parser);
        self_frame     = (ast_expression*)ast_entfield_new(ctx, gbl_self, fld_frame);
        self_nextthink = (ast_expression*)ast_entfield_new(ctx, gbl_self, fld_nextthink);
        self_think     = (ast_expression*)ast_entfield_new(ctx, gbl_self, fld_think);

        time_plus_1    = (ast_expression*)ast_binary_new(ctx, INSTR_ADD_F,
                         gbl_time, (ast_expression*)parser_const_float(parser, 0.1));

        if (!self_frame || !self_nextthink || !self_think || !time_plus_1) {
            if (self_frame)     ast_delete(self_frame);
            if (self_nextthink) ast_delete(self_nextthink);
            if (self_think)     ast_delete(self_think);
            if (time_plus_1)    ast_delete(time_plus_1);
            retval = false;
        }

        if (retval)
        {
            store_frame     = ast_store_new(ctx, INSTR_STOREP_F,   self_frame,     framenum);
            store_nextthink = ast_store_new(ctx, INSTR_STOREP_F,   self_nextthink, time_plus_1);
            store_think     = ast_store_new(ctx, INSTR_STOREP_FNC, self_think,     nextthink);

            if (!store_frame) {
                ast_delete(self_frame);
                retval = false;
            }
            if (!store_nextthink) {
                ast_delete(self_nextthink);
                retval = false;
            }
            if (!store_think) {
                ast_delete(self_think);
                retval = false;
            }
            if (!retval) {
                if (store_frame)     ast_delete(store_frame);
                if (store_nextthink) ast_delete(store_nextthink);
                if (store_think)     ast_delete(store_think);
                retval = false;
            }
            if (!ast_block_add_expr(block, (ast_expression*)store_frame) ||
                !ast_block_add_expr(block, (ast_expression*)store_nextthink) ||
                !ast_block_add_expr(block, (ast_expression*)store_think))
            {
                retval = false;
            }
        }

        if (!retval) {
            parseerror(parser, "failed to generate code for [frame,think]");
            ast_unref(nextthink);
            ast_unref(framenum);
            ast_delete(block);
            return false;
        }
    }

    if (var->hasvalue) {
        parseerror(parser, "function `%s` declared with multiple bodies", var->name);
        ast_block_delete(block);
        goto enderr;
    }

    func = ast_function_new(ast_ctx(var), var->name, var);
    if (!func) {
        parseerror(parser, "failed to allocate function for `%s`", var->name);
        ast_block_delete(block);
        goto enderr;
    }
    vec_push(parser->functions, func);

    parser_enterblock(parser);

    for (parami = 0; parami < vec_size(var->expression.params); ++parami) {
        size_t     e;
        ast_value *param = var->expression.params[parami];
        ast_member *me[3];

        if (param->expression.vtype != TYPE_VECTOR &&
            (param->expression.vtype != TYPE_FIELD ||
             param->expression.next->vtype != TYPE_VECTOR))
        {
            continue;
        }

        if (!create_vector_members(param, me)) {
            ast_block_delete(block);
            goto enderrfn;
        }

        for (e = 0; e < 3; ++e) {
            parser_addlocal(parser, me[e]->name, (ast_expression*)me[e]);
            ast_block_collect(block, (ast_expression*)me[e]);
        }
    }

    if (var->argcounter) {
        ast_value *argc = ast_value_new(ast_ctx(var), var->argcounter, TYPE_FLOAT);
        parser_addlocal(parser, argc->name, (ast_expression*)argc);
        func->argc = argc;
    }

    if (OPTS_FLAG(VARIADIC_ARGS) && var->expression.flags & AST_FLAG_VARIADIC) {
        char name[1024];
        ast_value *varargs = ast_value_new(ast_ctx(var), "reserved:va_args", TYPE_ARRAY);
        varargs->expression.flags |= AST_FLAG_IS_VARARG;
        varargs->expression.next = (ast_expression*)ast_value_new(ast_ctx(var), NULL, TYPE_VECTOR);
        varargs->expression.count = 0;
        util_snprintf(name, sizeof(name), "%s##va##SET", var->name);
        if (!parser_create_array_setter_proto(parser, varargs, name)) {
            ast_delete(varargs);
            ast_block_delete(block);
            goto enderrfn;
        }
        util_snprintf(name, sizeof(name), "%s##va##GET", var->name);
        if (!parser_create_array_getter_proto(parser, varargs, varargs->expression.next, name)) {
            ast_delete(varargs);
            ast_block_delete(block);
            goto enderrfn;
        }
        func->varargs = varargs;

        func->fixedparams = parser_const_float(parser, vec_size(var->expression.params));
    }

    parser->function = func;
    if (!parse_block_into(parser, block)) {
        ast_block_delete(block);
        goto enderrfn;
    }

    vec_push(func->blocks, block);
    

    parser->function = old;
    if (!parser_leaveblock(parser))
        retval = false;
    if (vec_size(parser->variables) != PARSER_HT_LOCALS) {
        parseerror(parser, "internal error: local scopes left");
        retval = false;
    }

    if (parser->tok == ';')
        return parser_next(parser);
    else if (OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC)
        parseerror(parser, "missing semicolon after function body (mandatory with -std=qcc)");
    return retval;

enderrfn:
    (void)!parser_leaveblock(parser);
    vec_pop(parser->functions);
    ast_function_delete(func);
    var->constval.vfunc = NULL;

enderr:
    parser->function = old;
    return false;
}

static ast_expression *array_accessor_split(
    parser_t  *parser,
    ast_value *array,
    ast_value *index,
    size_t     middle,
    ast_expression *left,
    ast_expression *right
    )
{
    ast_ifthen *ifthen;
    ast_binary *cmp;

    lex_ctx ctx = ast_ctx(array);

    if (!left || !right) {
        if (left)  ast_delete(left);
        if (right) ast_delete(right);
        return NULL;
    }

    cmp = ast_binary_new(ctx, INSTR_LT,
                         (ast_expression*)index,
                         (ast_expression*)parser_const_float(parser, middle));
    if (!cmp) {
        ast_delete(left);
        ast_delete(right);
        parseerror(parser, "internal error: failed to create comparison for array setter");
        return NULL;
    }

    ifthen = ast_ifthen_new(ctx, (ast_expression*)cmp, left, right);
    if (!ifthen) {
        ast_delete(cmp); /* will delete left and right */
        parseerror(parser, "internal error: failed to create conditional jump for array setter");
        return NULL;
    }

    return (ast_expression*)ifthen;
}

static ast_expression *array_setter_node(parser_t *parser, ast_value *array, ast_value *index, ast_value *value, size_t from, size_t afterend)
{
    lex_ctx ctx = ast_ctx(array);

    if (from+1 == afterend) {
        /* set this value */
        ast_block       *block;
        ast_return      *ret;
        ast_array_index *subscript;
        ast_store       *st;
        int assignop = type_store_instr[value->expression.vtype];

        if (value->expression.vtype == TYPE_FIELD && value->expression.next->vtype == TYPE_VECTOR)
            assignop = INSTR_STORE_V;

        subscript = ast_array_index_new(ctx, (ast_expression*)array, (ast_expression*)parser_const_float(parser, from));
        if (!subscript)
            return NULL;

        st = ast_store_new(ctx, assignop, (ast_expression*)subscript, (ast_expression*)value);
        if (!st) {
            ast_delete(subscript);
            return NULL;
        }

        block = ast_block_new(ctx);
        if (!block) {
            ast_delete(st);
            return NULL;
        }

        if (!ast_block_add_expr(block, (ast_expression*)st)) {
            ast_delete(block);
            return NULL;
        }

        ret = ast_return_new(ctx, NULL);
        if (!ret) {
            ast_delete(block);
            return NULL;
        }

        if (!ast_block_add_expr(block, (ast_expression*)ret)) {
            ast_delete(block);
            return NULL;
        }

        return (ast_expression*)block;
    } else {
        ast_expression *left, *right;
        size_t diff = afterend - from;
        size_t middle = from + diff/2;
        left  = array_setter_node(parser, array, index, value, from, middle);
        right = array_setter_node(parser, array, index, value, middle, afterend);
        return array_accessor_split(parser, array, index, middle, left, right);
    }
}

static ast_expression *array_field_setter_node(
    parser_t  *parser,
    ast_value *array,
    ast_value *entity,
    ast_value *index,
    ast_value *value,
    size_t     from,
    size_t     afterend)
{
    lex_ctx ctx = ast_ctx(array);

    if (from+1 == afterend) {
        /* set this value */
        ast_block       *block;
        ast_return      *ret;
        ast_entfield    *entfield;
        ast_array_index *subscript;
        ast_store       *st;
        int assignop = type_storep_instr[value->expression.vtype];

        if (value->expression.vtype == TYPE_FIELD && value->expression.next->vtype == TYPE_VECTOR)
            assignop = INSTR_STOREP_V;

        subscript = ast_array_index_new(ctx, (ast_expression*)array, (ast_expression*)parser_const_float(parser, from));
        if (!subscript)
            return NULL;

        subscript->expression.next = ast_type_copy(ast_ctx(subscript), (ast_expression*)subscript);
        subscript->expression.vtype = TYPE_FIELD;

        entfield = ast_entfield_new_force(ctx,
                                          (ast_expression*)entity,
                                          (ast_expression*)subscript,
                                          (ast_expression*)subscript);
        if (!entfield) {
            ast_delete(subscript);
            return NULL;
        }

        st = ast_store_new(ctx, assignop, (ast_expression*)entfield, (ast_expression*)value);
        if (!st) {
            ast_delete(entfield);
            return NULL;
        }

        block = ast_block_new(ctx);
        if (!block) {
            ast_delete(st);
            return NULL;
        }

        if (!ast_block_add_expr(block, (ast_expression*)st)) {
            ast_delete(block);
            return NULL;
        }

        ret = ast_return_new(ctx, NULL);
        if (!ret) {
            ast_delete(block);
            return NULL;
        }

        if (!ast_block_add_expr(block, (ast_expression*)ret)) {
            ast_delete(block);
            return NULL;
        }

        return (ast_expression*)block;
    } else {
        ast_expression *left, *right;
        size_t diff = afterend - from;
        size_t middle = from + diff/2;
        left  = array_field_setter_node(parser, array, entity, index, value, from, middle);
        right = array_field_setter_node(parser, array, entity, index, value, middle, afterend);
        return array_accessor_split(parser, array, index, middle, left, right);
    }
}

static ast_expression *array_getter_node(parser_t *parser, ast_value *array, ast_value *index, size_t from, size_t afterend)
{
    lex_ctx ctx = ast_ctx(array);

    if (from+1 == afterend) {
        ast_return      *ret;
        ast_array_index *subscript;

        subscript = ast_array_index_new(ctx, (ast_expression*)array, (ast_expression*)parser_const_float(parser, from));
        if (!subscript)
            return NULL;

        ret = ast_return_new(ctx, (ast_expression*)subscript);
        if (!ret) {
            ast_delete(subscript);
            return NULL;
        }

        return (ast_expression*)ret;
    } else {
        ast_expression *left, *right;
        size_t diff = afterend - from;
        size_t middle = from + diff/2;
        left  = array_getter_node(parser, array, index, from, middle);
        right = array_getter_node(parser, array, index, middle, afterend);
        return array_accessor_split(parser, array, index, middle, left, right);
    }
}

static bool parser_create_array_accessor(parser_t *parser, ast_value *array, const char *funcname, ast_value **out)
{
    ast_function   *func = NULL;
    ast_value      *fval = NULL;
    ast_block      *body = NULL;

    fval = ast_value_new(ast_ctx(array), funcname, TYPE_FUNCTION);
    if (!fval) {
        parseerror(parser, "failed to create accessor function value");
        return false;
    }

    func = ast_function_new(ast_ctx(array), funcname, fval);
    if (!func) {
        ast_delete(fval);
        parseerror(parser, "failed to create accessor function node");
        return false;
    }

    body = ast_block_new(ast_ctx(array));
    if (!body) {
        parseerror(parser, "failed to create block for array accessor");
        ast_delete(fval);
        ast_delete(func);
        return false;
    }

    vec_push(func->blocks, body);
    *out = fval;

    vec_push(parser->accessors, fval);

    return true;
}

static ast_value* parser_create_array_setter_proto(parser_t *parser, ast_value *array, const char *funcname)
{
    ast_value      *index = NULL;
    ast_value      *value = NULL;
    ast_function   *func;
    ast_value      *fval;

    if (!ast_istype(array->expression.next, ast_value)) {
        parseerror(parser, "internal error: array accessor needs to build an ast_value with a copy of the element type");
        return NULL;
    }

    if (!parser_create_array_accessor(parser, array, funcname, &fval))
        return NULL;
    func = fval->constval.vfunc;
    fval->expression.next = (ast_expression*)ast_value_new(ast_ctx(array), "<void>", TYPE_VOID);

    index = ast_value_new(ast_ctx(array), "index", TYPE_FLOAT);
    value = ast_value_copy((ast_value*)array->expression.next);

    if (!index || !value) {
        parseerror(parser, "failed to create locals for array accessor");
        goto cleanup;
    }
    (void)!ast_value_set_name(value, "value"); /* not important */
    vec_push(fval->expression.params, index);
    vec_push(fval->expression.params, value);

    array->setter = fval;
    return fval;
cleanup:
    if (index) ast_delete(index);
    if (value) ast_delete(value);
    ast_delete(func);
    ast_delete(fval);
    return NULL;
}

static bool parser_create_array_setter_impl(parser_t *parser, ast_value *array)
{
    ast_expression *root = NULL;
    root = array_setter_node(parser, array,
                             array->setter->expression.params[0],
                             array->setter->expression.params[1],
                             0, array->expression.count);
    if (!root) {
        parseerror(parser, "failed to build accessor search tree");
        return false;
    }
    if (!ast_block_add_expr(array->setter->constval.vfunc->blocks[0], root)) {
        ast_delete(root);
        return false;
    }
    return true;
}

static bool parser_create_array_setter(parser_t *parser, ast_value *array, const char *funcname)
{
    if (!parser_create_array_setter_proto(parser, array, funcname))
        return false;
    return parser_create_array_setter_impl(parser, array);
}

static bool parser_create_array_field_setter(parser_t *parser, ast_value *array, const char *funcname)
{
    ast_expression *root = NULL;
    ast_value      *entity = NULL;
    ast_value      *index = NULL;
    ast_value      *value = NULL;
    ast_function   *func;
    ast_value      *fval;

    if (!ast_istype(array->expression.next, ast_value)) {
        parseerror(parser, "internal error: array accessor needs to build an ast_value with a copy of the element type");
        return false;
    }

    if (!parser_create_array_accessor(parser, array, funcname, &fval))
        return false;
    func = fval->constval.vfunc;
    fval->expression.next = (ast_expression*)ast_value_new(ast_ctx(array), "<void>", TYPE_VOID);

    entity = ast_value_new(ast_ctx(array), "entity", TYPE_ENTITY);
    index  = ast_value_new(ast_ctx(array), "index",  TYPE_FLOAT);
    value  = ast_value_copy((ast_value*)array->expression.next);
    if (!entity || !index || !value) {
        parseerror(parser, "failed to create locals for array accessor");
        goto cleanup;
    }
    (void)!ast_value_set_name(value, "value"); /* not important */
    vec_push(fval->expression.params, entity);
    vec_push(fval->expression.params, index);
    vec_push(fval->expression.params, value);

    root = array_field_setter_node(parser, array, entity, index, value, 0, array->expression.count);
    if (!root) {
        parseerror(parser, "failed to build accessor search tree");
        goto cleanup;
    }

    array->setter = fval;
    return ast_block_add_expr(func->blocks[0], root);
cleanup:
    if (entity) ast_delete(entity);
    if (index)  ast_delete(index);
    if (value)  ast_delete(value);
    if (root)   ast_delete(root);
    ast_delete(func);
    ast_delete(fval);
    return false;
}

static ast_value* parser_create_array_getter_proto(parser_t *parser, ast_value *array, const ast_expression *elemtype, const char *funcname)
{
    ast_value      *index = NULL;
    ast_value      *fval;
    ast_function   *func;

    /* NOTE: checking array->expression.next rather than elemtype since
     * for fields elemtype is a temporary fieldtype.
     */
    if (!ast_istype(array->expression.next, ast_value)) {
        parseerror(parser, "internal error: array accessor needs to build an ast_value with a copy of the element type");
        return NULL;
    }

    if (!parser_create_array_accessor(parser, array, funcname, &fval))
        return NULL;
    func = fval->constval.vfunc;
    fval->expression.next = ast_type_copy(ast_ctx(array), elemtype);

    index = ast_value_new(ast_ctx(array), "index", TYPE_FLOAT);

    if (!index) {
        parseerror(parser, "failed to create locals for array accessor");
        goto cleanup;
    }
    vec_push(fval->expression.params, index);

    array->getter = fval;
    return fval;
cleanup:
    if (index) ast_delete(index);
    ast_delete(func);
    ast_delete(fval);
    return NULL;
}

static bool parser_create_array_getter_impl(parser_t *parser, ast_value *array)
{
    ast_expression *root = NULL;

    root = array_getter_node(parser, array, array->getter->expression.params[0], 0, array->expression.count);
    if (!root) {
        parseerror(parser, "failed to build accessor search tree");
        return false;
    }
    if (!ast_block_add_expr(array->getter->constval.vfunc->blocks[0], root)) {
        ast_delete(root);
        return false;
    }
    return true;
}

static bool parser_create_array_getter(parser_t *parser, ast_value *array, const ast_expression *elemtype, const char *funcname)
{
    if (!parser_create_array_getter_proto(parser, array, elemtype, funcname))
        return false;
    return parser_create_array_getter_impl(parser, array);
}

static ast_value *parse_typename(parser_t *parser, ast_value **storebase, ast_value *cached_typedef);
static ast_value *parse_parameter_list(parser_t *parser, ast_value *var)
{
    lex_ctx     ctx;
    size_t      i;
    ast_value **params;
    ast_value  *param;
    ast_value  *fval;
    bool        first = true;
    bool        variadic = false;
    ast_value  *varparam = NULL;
    char       *argcounter = NULL;

    ctx = parser_ctx(parser);

    /* for the sake of less code we parse-in in this function */
    if (!parser_next(parser)) {
        ast_delete(var);
        parseerror(parser, "expected parameter list");
        return NULL;
    }

    params = NULL;

    /* parse variables until we hit a closing paren */
    while (parser->tok != ')') {
        if (!first) {
            /* there must be commas between them */
            if (parser->tok != ',') {
                parseerror(parser, "expected comma or end of parameter list");
                goto on_error;
            }
            if (!parser_next(parser)) {
                parseerror(parser, "expected parameter");
                goto on_error;
            }
        }
        first = false;

        if (parser->tok == TOKEN_DOTS) {
            /* '...' indicates a varargs function */
            variadic = true;
            if (!parser_next(parser) || (parser->tok != ')' && parser->tok != TOKEN_IDENT)) {
                parseerror(parser, "`...` must be the last parameter of a variadic function declaration");
                goto on_error;
            }
            if (parser->tok == TOKEN_IDENT) {
                argcounter = util_strdup(parser_tokval(parser));
                if (!parser_next(parser) || parser->tok != ')') {
                    parseerror(parser, "`...` must be the last parameter of a variadic function declaration");
                    goto on_error;
                }
            }
        }
        else
        {
            /* for anything else just parse a typename */
            param = parse_typename(parser, NULL, NULL);
            if (!param)
                goto on_error;
            vec_push(params, param);
            if (param->expression.vtype >= TYPE_VARIANT) {
                char tname[1024]; /* typename is reserved in C++ */
                ast_type_to_string((ast_expression*)param, tname, sizeof(tname));
                parseerror(parser, "type not supported as part of a parameter list: %s", tname);
                goto on_error;
            }
            /* type-restricted varargs */
            if (parser->tok == TOKEN_DOTS) {
                variadic = true;
                varparam = vec_last(params);
                vec_pop(params);
                if (!parser_next(parser) || (parser->tok != ')' && parser->tok != TOKEN_IDENT)) {
                    parseerror(parser, "`...` must be the last parameter of a variadic function declaration");
                    goto on_error;
                }
                if (parser->tok == TOKEN_IDENT) {
                    argcounter = util_strdup(parser_tokval(parser));
                    if (!parser_next(parser) || parser->tok != ')') {
                        parseerror(parser, "`...` must be the last parameter of a variadic function declaration");
                        goto on_error;
                    }
                }
            }
        }
    }

    if (vec_size(params) == 1 && params[0]->expression.vtype == TYPE_VOID)
        vec_free(params);

    /* sanity check */
    if (vec_size(params) > 8 && OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC)
        (void)!parsewarning(parser, WARN_EXTENSIONS, "more than 8 parameters are not supported by this standard");

    /* parse-out */
    if (!parser_next(parser)) {
        parseerror(parser, "parse error after typename");
        goto on_error;
    }

    /* now turn 'var' into a function type */
    fval = ast_value_new(ctx, "<type()>", TYPE_FUNCTION);
    fval->expression.next     = (ast_expression*)var;
    if (variadic)
        fval->expression.flags |= AST_FLAG_VARIADIC;
    var = fval;

    var->expression.params   = params;
    var->expression.varparam = (ast_expression*)varparam;
    var->argcounter          = argcounter;
    params = NULL;

    return var;

on_error:
    if (argcounter)
        mem_d(argcounter);
    if (varparam)
        ast_delete(varparam);
    ast_delete(var);
    for (i = 0; i < vec_size(params); ++i)
        ast_delete(params[i]);
    vec_free(params);
    return NULL;
}

static ast_value *parse_arraysize(parser_t *parser, ast_value *var)
{
    ast_expression *cexp;
    ast_value      *cval, *tmp;
    lex_ctx ctx;

    ctx = parser_ctx(parser);

    if (!parser_next(parser)) {
        ast_delete(var);
        parseerror(parser, "expected array-size");
        return NULL;
    }

    cexp = parse_expression_leave(parser, true, false, false);

    if (!cexp || !ast_istype(cexp, ast_value)) {
        if (cexp)
            ast_unref(cexp);
        ast_delete(var);
        parseerror(parser, "expected array-size as constant positive integer");
        return NULL;
    }
    cval = (ast_value*)cexp;

    tmp = ast_value_new(ctx, "<type[]>", TYPE_ARRAY);
    tmp->expression.next = (ast_expression*)var;
    var = tmp;

    if (cval->expression.vtype == TYPE_INTEGER)
        tmp->expression.count = cval->constval.vint;
    else if (cval->expression.vtype == TYPE_FLOAT)
        tmp->expression.count = cval->constval.vfloat;
    else {
        ast_unref(cexp);
        ast_delete(var);
        parseerror(parser, "array-size must be a positive integer constant");
        return NULL;
    }
    ast_unref(cexp);

    if (parser->tok != ']') {
        ast_delete(var);
        parseerror(parser, "expected ']' after array-size");
        return NULL;
    }
    if (!parser_next(parser)) {
        ast_delete(var);
        parseerror(parser, "error after parsing array size");
        return NULL;
    }
    return var;
}

/* Parse a complete typename.
 * for single-variables (ie. function parameters or typedefs) storebase should be NULL
 * but when parsing variables separated by comma
 * 'storebase' should point to where the base-type should be kept.
 * The base type makes up every bit of type information which comes *before* the
 * variable name.
 *
 * The following will be parsed in its entirety:
 *     void() foo()
 * The 'basetype' in this case is 'void()'
 * and if there's a comma after it, say:
 *     void() foo(), bar
 * then the type-information 'void()' can be stored in 'storebase'
 */
static ast_value *parse_typename(parser_t *parser, ast_value **storebase, ast_value *cached_typedef)
{
    ast_value *var, *tmp;
    lex_ctx    ctx;

    const char *name = NULL;
    bool        isfield  = false;
    bool        wasarray = false;
    size_t      morefields = 0;

    ctx = parser_ctx(parser);

    /* types may start with a dot */
    if (parser->tok == '.') {
        isfield = true;
        /* if we parsed a dot we need a typename now */
        if (!parser_next(parser)) {
            parseerror(parser, "expected typename for field definition");
            return NULL;
        }

        /* Further dots are handled seperately because they won't be part of the
         * basetype
         */
        while (parser->tok == '.') {
            ++morefields;
            if (!parser_next(parser)) {
                parseerror(parser, "expected typename for field definition");
                return NULL;
            }
        }
    }
    if (parser->tok == TOKEN_IDENT)
        cached_typedef = parser_find_typedef(parser, parser_tokval(parser), 0);
    if (!cached_typedef && parser->tok != TOKEN_TYPENAME) {
        parseerror(parser, "expected typename");
        return NULL;
    }

    /* generate the basic type value */
    if (cached_typedef) {
        var = ast_value_copy(cached_typedef);
        ast_value_set_name(var, "<type(from_def)>");
    } else
        var = ast_value_new(ctx, "<type>", parser_token(parser)->constval.t);

    for (; morefields; --morefields) {
        tmp = ast_value_new(ctx, "<.type>", TYPE_FIELD);
        tmp->expression.next = (ast_expression*)var;
        var = tmp;
    }

    /* do not yet turn into a field - remember:
     * .void() foo; is a field too
     * .void()() foo; is a function
     */

    /* parse on */
    if (!parser_next(parser)) {
        ast_delete(var);
        parseerror(parser, "parse error after typename");
        return NULL;
    }

    /* an opening paren now starts the parameter-list of a function
     * this is where original-QC has parameter lists.
     * We allow a single parameter list here.
     * Much like fteqcc we don't allow `float()() x`
     */
    if (parser->tok == '(') {
        var = parse_parameter_list(parser, var);
        if (!var)
            return NULL;
    }

    /* store the base if requested */
    if (storebase) {
        *storebase = ast_value_copy(var);
        if (isfield) {
            tmp = ast_value_new(ctx, "<type:f>", TYPE_FIELD);
            tmp->expression.next = (ast_expression*)*storebase;
            *storebase = tmp;
        }
    }

    /* there may be a name now */
    if (parser->tok == TOKEN_IDENT) {
        name = util_strdup(parser_tokval(parser));
        /* parse on */
        if (!parser_next(parser)) {
            ast_delete(var);
            mem_d(name);
            parseerror(parser, "error after variable or field declaration");
            return NULL;
        }
    }

    /* now this may be an array */
    if (parser->tok == '[') {
        wasarray = true;
        var = parse_arraysize(parser, var);
        if (!var) {
            if (name) mem_d(name);
            return NULL;
        }
    }

    /* This is the point where we can turn it into a field */
    if (isfield) {
        /* turn it into a field if desired */
        tmp = ast_value_new(ctx, "<type:f>", TYPE_FIELD);
        tmp->expression.next = (ast_expression*)var;
        var = tmp;
    }

    /* now there may be function parens again */
    if (parser->tok == '(' && OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC)
        parseerror(parser, "C-style function syntax is not allowed in -std=qcc");
    if (parser->tok == '(' && wasarray)
        parseerror(parser, "arrays as part of a return type is not supported");
    while (parser->tok == '(') {
        var = parse_parameter_list(parser, var);
        if (!var) {
            if (name) mem_d(name);
            return NULL;
        }
    }

    /* finally name it */
    if (name) {
        if (!ast_value_set_name(var, name)) {
            ast_delete(var);
            mem_d(name);
            parseerror(parser, "internal error: failed to set name");
            return NULL;
        }
        /* free the name, ast_value_set_name duplicates */
        mem_d(name);
    }

    return var;
}

static bool parse_typedef(parser_t *parser)
{
    ast_value      *typevar, *oldtype;
    ast_expression *old;

    typevar = parse_typename(parser, NULL, NULL);

    if (!typevar)
        return false;

    if ( (old = parser_find_var(parser, typevar->name)) ) {
        parseerror(parser, "cannot define a type with the same name as a variable: %s\n"
                   " -> `%s` has been declared here: %s:%i",
                   typevar->name, ast_ctx(old).file, ast_ctx(old).line);
        ast_delete(typevar);
        return false;
    }

    if ( (oldtype = parser_find_typedef(parser, typevar->name, vec_last(parser->_blocktypedefs))) ) {
        parseerror(parser, "type `%s` has already been declared here: %s:%i",
                   typevar->name, ast_ctx(oldtype).file, ast_ctx(oldtype).line);
        ast_delete(typevar);
        return false;
    }

    vec_push(parser->_typedefs, typevar);
    util_htset(vec_last(parser->typedefs), typevar->name, typevar);

    if (parser->tok != ';') {
        parseerror(parser, "expected semicolon after typedef");
        return false;
    }
    if (!parser_next(parser)) {
        parseerror(parser, "parse error after typedef");
        return false;
    }

    return true;
}

static const char *cvq_to_str(int cvq) {
    switch (cvq) {
        case CV_NONE:  return "none";
        case CV_VAR:   return "`var`";
        case CV_CONST: return "`const`";
        default:       return "<INVALID>";
    }
}

static bool parser_check_qualifiers(parser_t *parser, const ast_value *var, const ast_value *proto)
{
    bool av, ao;
    if (proto->cvq != var->cvq) {
        if (!(proto->cvq == CV_CONST && var->cvq == CV_NONE &&
              !OPTS_FLAG(INITIALIZED_NONCONSTANTS) &&
              parser->tok == '='))
        {
            return !parsewarning(parser, WARN_DIFFERENT_QUALIFIERS,
                                 "`%s` declared with different qualifiers: %s\n"
                                 " -> previous declaration here: %s:%i uses %s",
                                 var->name, cvq_to_str(var->cvq),
                                 ast_ctx(proto).file, ast_ctx(proto).line,
                                 cvq_to_str(proto->cvq));
        }
    }
    av = (var  ->expression.flags & AST_FLAG_NORETURN);
    ao = (proto->expression.flags & AST_FLAG_NORETURN);
    if (!av != !ao) {
        return !parsewarning(parser, WARN_DIFFERENT_ATTRIBUTES,
                             "`%s` declared with different attributes%s\n"
                             " -> previous declaration here: %s:%i",
                             var->name, (av ? ": noreturn" : ""),
                             ast_ctx(proto).file, ast_ctx(proto).line,
                             (ao ? ": noreturn" : ""));
    }
    return true;
}

static bool parse_variable(parser_t *parser, ast_block *localblock, bool nofields, int qualifier, ast_value *cached_typedef, bool noref, bool is_static, uint32_t qflags, char *vstring)
{
    ast_value *var;
    ast_value *proto;
    ast_expression *old;
    bool       was_end;
    size_t     i;

    ast_value *basetype = NULL;
    bool      retval    = true;
    bool      isparam   = false;
    bool      isvector  = false;
    bool      cleanvar  = true;
    bool      wasarray  = false;

    ast_member *me[3] = { NULL, NULL, NULL };

    if (!localblock && is_static)
        parseerror(parser, "`static` qualifier is not supported in global scope");

    /* get the first complete variable */
    var = parse_typename(parser, &basetype, cached_typedef);
    if (!var) {
        if (basetype)
            ast_delete(basetype);
        return false;
    }

    while (true) {
        proto = NULL;
        wasarray = false;

        /* Part 0: finish the type */
        if (parser->tok == '(') {
            if (OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC)
                parseerror(parser, "C-style function syntax is not allowed in -std=qcc");
            var = parse_parameter_list(parser, var);
            if (!var) {
                retval = false;
                goto cleanup;
            }
        }
        /* we only allow 1-dimensional arrays */
        if (parser->tok == '[') {
            wasarray = true;
            var = parse_arraysize(parser, var);
            if (!var) {
                retval = false;
                goto cleanup;
            }
        }
        if (parser->tok == '(' && wasarray) {
            parseerror(parser, "arrays as part of a return type is not supported");
            /* we'll still parse the type completely for now */
        }
        /* for functions returning functions */
        while (parser->tok == '(') {
            if (OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC)
                parseerror(parser, "C-style function syntax is not allowed in -std=qcc");
            var = parse_parameter_list(parser, var);
            if (!var) {
                retval = false;
                goto cleanup;
            }
        }

        var->cvq = qualifier;
        var->expression.flags |= qflags;

        /*
         * store the vstring back to var for alias and
         * deprecation messages.
         */
        if (var->expression.flags & AST_FLAG_DEPRECATED ||
            var->expression.flags & AST_FLAG_ALIAS)
            var->desc = vstring;

        /* Part 1:
         * check for validity: (end_sys_..., multiple-definitions, prototypes, ...)
         * Also: if there was a prototype, `var` will be deleted and set to `proto` which
         * is then filled with the previous definition and the parameter-names replaced.
         */
        if (!strcmp(var->name, "nil")) {
            if (OPTS_FLAG(UNTYPED_NIL)) {
                if (!localblock || !OPTS_FLAG(PERMISSIVE))
                    parseerror(parser, "name `nil` not allowed (try -fpermissive)");
            } else
                (void)!parsewarning(parser, WARN_RESERVED_NAMES, "variable name `nil` is reserved");
        }
        if (!localblock) {
            /* Deal with end_sys_ vars */
            was_end = false;
            if (!strcmp(var->name, "end_sys_globals")) {
                var->uses++;
                parser->crc_globals = vec_size(parser->globals);
                was_end = true;
            }
            else if (!strcmp(var->name, "end_sys_fields")) {
                var->uses++;
                parser->crc_fields = vec_size(parser->fields);
                was_end = true;
            }
            if (was_end && var->expression.vtype == TYPE_FIELD) {
                if (parsewarning(parser, WARN_END_SYS_FIELDS,
                                 "global '%s' hint should not be a field",
                                 parser_tokval(parser)))
                {
                    retval = false;
                    goto cleanup;
                }
            }

            if (!nofields && var->expression.vtype == TYPE_FIELD)
            {
                /* deal with field declarations */
                old = parser_find_field(parser, var->name);
                if (old) {
                    if (parsewarning(parser, WARN_FIELD_REDECLARED, "field `%s` already declared here: %s:%i",
                                     var->name, ast_ctx(old).file, (int)ast_ctx(old).line))
                    {
                        retval = false;
                        goto cleanup;
                    }
                    ast_delete(var);
                    var = NULL;
                    goto skipvar;
                    /*
                    parseerror(parser, "field `%s` already declared here: %s:%i",
                               var->name, ast_ctx(old).file, ast_ctx(old).line);
                    retval = false;
                    goto cleanup;
                    */
                }
                if ((OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC || OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_FTEQCC) &&
                    (old = parser_find_global(parser, var->name)))
                {
                    parseerror(parser, "cannot declare a field and a global of the same name with -std=qcc");
                    parseerror(parser, "field `%s` already declared here: %s:%i",
                               var->name, ast_ctx(old).file, ast_ctx(old).line);
                    retval = false;
                    goto cleanup;
                }
            }
            else
            {
                /* deal with other globals */
                old = parser_find_global(parser, var->name);
                if (old && var->expression.vtype == TYPE_FUNCTION && old->vtype == TYPE_FUNCTION)
                {
                    /* This is a function which had a prototype */
                    if (!ast_istype(old, ast_value)) {
                        parseerror(parser, "internal error: prototype is not an ast_value");
                        retval = false;
                        goto cleanup;
                    }
                    proto = (ast_value*)old;
                    proto->desc = var->desc;
                    if (!ast_compare_type((ast_expression*)proto, (ast_expression*)var)) {
                        parseerror(parser, "conflicting types for `%s`, previous declaration was here: %s:%i",
                                   proto->name,
                                   ast_ctx(proto).file, ast_ctx(proto).line);
                        retval = false;
                        goto cleanup;
                    }
                    /* we need the new parameter-names */
                    for (i = 0; i < vec_size(proto->expression.params); ++i)
                        ast_value_set_name(proto->expression.params[i], var->expression.params[i]->name);
                    if (!parser_check_qualifiers(parser, var, proto)) {
                        retval = false;
                        if (proto->desc)
                            mem_d(proto->desc);
                        proto = NULL;
                        goto cleanup;
                    }
                    proto->expression.flags |= var->expression.flags;
                    ast_delete(var);
                    var = proto;
                }
                else
                {
                    /* other globals */
                    if (old) {
                        if (parsewarning(parser, WARN_DOUBLE_DECLARATION,
                                         "global `%s` already declared here: %s:%i",
                                         var->name, ast_ctx(old).file, ast_ctx(old).line))
                        {
                            retval = false;
                            goto cleanup;
                        }
                        proto = (ast_value*)old;
                        if (!ast_istype(old, ast_value)) {
                            parseerror(parser, "internal error: not an ast_value");
                            retval = false;
                            proto = NULL;
                            goto cleanup;
                        }
                        if (!parser_check_qualifiers(parser, var, proto)) {
                            retval = false;
                            proto = NULL;
                            goto cleanup;
                        }
                        proto->expression.flags |= var->expression.flags;
                        ast_delete(var);
                        var = proto;
                    }
                    if (OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC &&
                        (old = parser_find_field(parser, var->name)))
                    {
                        parseerror(parser, "cannot declare a field and a global of the same name with -std=qcc");
                        parseerror(parser, "global `%s` already declared here: %s:%i",
                                   var->name, ast_ctx(old).file, ast_ctx(old).line);
                        retval = false;
                        goto cleanup;
                    }
                }
            }
        }
        else /* it's not a global */
        {
            old = parser_find_local(parser, var->name, vec_size(parser->variables)-1, &isparam);
            if (old && !isparam) {
                parseerror(parser, "local `%s` already declared here: %s:%i",
                           var->name, ast_ctx(old).file, (int)ast_ctx(old).line);
                retval = false;
                goto cleanup;
            }
            old = parser_find_local(parser, var->name, 0, &isparam);
            if (old && isparam) {
                if (parsewarning(parser, WARN_LOCAL_SHADOWS,
                                 "local `%s` is shadowing a parameter", var->name))
                {
                    parseerror(parser, "local `%s` already declared here: %s:%i",
                               var->name, ast_ctx(old).file, (int)ast_ctx(old).line);
                    retval = false;
                    goto cleanup;
                }
                if (OPTS_OPTION_U32(OPTION_STANDARD) != COMPILER_GMQCC) {
                    ast_delete(var);
                    var = NULL;
                    goto skipvar;
                }
            }
        }

        /* in a noref section we simply bump the usecount */
        if (noref || parser->noref)
            var->uses++;

        /* Part 2:
         * Create the global/local, and deal with vector types.
         */
        if (!proto) {
            if (var->expression.vtype == TYPE_VECTOR)
                isvector = true;
            else if (var->expression.vtype == TYPE_FIELD &&
                     var->expression.next->vtype == TYPE_VECTOR)
                isvector = true;

            if (isvector) {
                if (!create_vector_members(var, me)) {
                    retval = false;
                    goto cleanup;
                }
            }

            if (!localblock) {
                /* deal with global variables, fields, functions */
                if (!nofields && var->expression.vtype == TYPE_FIELD && parser->tok != '=') {
                    var->isfield = true;
                    vec_push(parser->fields, (ast_expression*)var);
                    util_htset(parser->htfields, var->name, var);
                    if (isvector) {
                        for (i = 0; i < 3; ++i) {
                            vec_push(parser->fields, (ast_expression*)me[i]);
                            util_htset(parser->htfields, me[i]->name, me[i]);
                        }
                    }
                }
                else {
                    if (!(var->expression.flags & AST_FLAG_ALIAS)) {
                        parser_addglobal(parser, var->name, (ast_expression*)var);
                        if (isvector) {
                            for (i = 0; i < 3; ++i) {
                                parser_addglobal(parser, me[i]->name, (ast_expression*)me[i]);
                            }
                        }
                    } else {
                        ast_expression *find  = parser_find_global(parser, var->desc);

                        if (!find) {
                            compile_error(parser_ctx(parser), "undeclared variable `%s` for alias `%s`", var->desc, var->name);
                            return false;
                        }

                        if (var->expression.vtype != find->vtype) {
                            char ty1[1024];
                            char ty2[1024];

                            ast_type_to_string(find,                  ty1, sizeof(ty1));
                            ast_type_to_string((ast_expression*)var,  ty2, sizeof(ty2));

                            compile_error(parser_ctx(parser), "incompatible types `%s` and `%s` for alias `%s`",
                                ty1, ty2, var->name
                            );
                            return false;
                        }

                        /*
                         * add alias to aliases table and to corrector
                         * so corrections can apply for aliases as well.
                         */
                        util_htset(parser->aliases, var->name, find);

                        /*
                         * add to corrector so corrections can work
                         * even for aliases too.
                         */
                        correct_add (
                             vec_last(parser->correct_variables),
                            &vec_last(parser->correct_variables_score),
                            var->name
                        );

                        /* generate aliases for vector components */
                        if (isvector) {
                            char *buffer[3];

                            util_asprintf(&buffer[0], "%s_x", var->desc);
                            util_asprintf(&buffer[1], "%s_y", var->desc);
                            util_asprintf(&buffer[2], "%s_z", var->desc);

                            util_htset(parser->aliases, me[0]->name, parser_find_global(parser, buffer[0]));
                            util_htset(parser->aliases, me[1]->name, parser_find_global(parser, buffer[1]));
                            util_htset(parser->aliases, me[2]->name, parser_find_global(parser, buffer[2]));

                            mem_d(buffer[0]);
                            mem_d(buffer[1]);
                            mem_d(buffer[2]);

                            /*
                             * add to corrector so corrections can work
                             * even for aliases too.
                             */
                            correct_add (
                                 vec_last(parser->correct_variables),
                                &vec_last(parser->correct_variables_score),
                                me[0]->name
                            );
                            correct_add (
                                 vec_last(parser->correct_variables),
                                &vec_last(parser->correct_variables_score),
                                me[1]->name
                            );
                            correct_add (
                                 vec_last(parser->correct_variables),
                                &vec_last(parser->correct_variables_score),
                                me[2]->name
                            );
                        }
                    }
                }
            } else {
                if (is_static) {
                    /* a static adds itself to be generated like any other global
                     * but is added to the local namespace instead
                     */
                    char   *defname = NULL;
                    size_t  prefix_len, ln;

                    ln = strlen(parser->function->name);
                    vec_append(defname, ln, parser->function->name);

                    vec_append(defname, 2, "::");
                    /* remember the length up to here */
                    prefix_len = vec_size(defname);

                    /* Add it to the local scope */
                    util_htset(vec_last(parser->variables), var->name, (void*)var);

                    /* corrector */
                    correct_add (
                         vec_last(parser->correct_variables),
                        &vec_last(parser->correct_variables_score),
                        var->name
                    );

                    /* now rename the global */
                    ln = strlen(var->name);
                    vec_append(defname, ln, var->name);
                    ast_value_set_name(var, defname);

                    /* push it to the to-be-generated globals */
                    vec_push(parser->globals, (ast_expression*)var);

                    /* same game for the vector members */
                    if (isvector) {
                        for (i = 0; i < 3; ++i) {
                            util_htset(vec_last(parser->variables), me[i]->name, (void*)(me[i]));

                            /* corrector */
                            correct_add(
                                 vec_last(parser->correct_variables),
                                &vec_last(parser->correct_variables_score),
                                me[i]->name
                            );

                            vec_shrinkto(defname, prefix_len);
                            ln = strlen(me[i]->name);
                            vec_append(defname, ln, me[i]->name);
                            ast_member_set_name(me[i], defname);

                            vec_push(parser->globals, (ast_expression*)me[i]);
                        }
                    }
                    vec_free(defname);
                } else {
                    vec_push(localblock->locals, var);
                    parser_addlocal(parser, var->name, (ast_expression*)var);
                    if (isvector) {
                        for (i = 0; i < 3; ++i) {
                            parser_addlocal(parser, me[i]->name, (ast_expression*)me[i]);
                            ast_block_collect(localblock, (ast_expression*)me[i]);
                        }
                    }
                }
            }
        }
        me[0] = me[1] = me[2] = NULL;
        cleanvar = false;
        /* Part 2.2
         * deal with arrays
         */
        if (var->expression.vtype == TYPE_ARRAY) {
            char name[1024];
            util_snprintf(name, sizeof(name), "%s##SET", var->name);
            if (!parser_create_array_setter(parser, var, name))
                goto cleanup;
            util_snprintf(name, sizeof(name), "%s##GET", var->name);
            if (!parser_create_array_getter(parser, var, var->expression.next, name))
                goto cleanup;
        }
        else if (!localblock && !nofields &&
                 var->expression.vtype == TYPE_FIELD &&
                 var->expression.next->vtype == TYPE_ARRAY)
        {
            char name[1024];
            ast_expression *telem;
            ast_value      *tfield;
            ast_value      *array = (ast_value*)var->expression.next;

            if (!ast_istype(var->expression.next, ast_value)) {
                parseerror(parser, "internal error: field element type must be an ast_value");
                goto cleanup;
            }

            util_snprintf(name, sizeof(name), "%s##SETF", var->name);
            if (!parser_create_array_field_setter(parser, array, name))
                goto cleanup;

            telem = ast_type_copy(ast_ctx(var), array->expression.next);
            tfield = ast_value_new(ast_ctx(var), "<.type>", TYPE_FIELD);
            tfield->expression.next = telem;
            util_snprintf(name, sizeof(name), "%s##GETFP", var->name);
            if (!parser_create_array_getter(parser, array, (ast_expression*)tfield, name)) {
                ast_delete(tfield);
                goto cleanup;
            }
            ast_delete(tfield);
        }

skipvar:
        if (parser->tok == ';') {
            ast_delete(basetype);
            if (!parser_next(parser)) {
                parseerror(parser, "error after variable declaration");
                return false;
            }
            return true;
        }

        if (parser->tok == ',')
            goto another;

        /*
        if (!var || (!localblock && !nofields && basetype->expression.vtype == TYPE_FIELD)) {
        */
        if (!var) {
            parseerror(parser, "missing comma or semicolon while parsing variables");
            break;
        }

        if (localblock && OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC) {
            if (parsewarning(parser, WARN_LOCAL_CONSTANTS,
                             "initializing expression turns variable `%s` into a constant in this standard",
                             var->name) )
            {
                break;
            }
        }

        if (parser->tok != '{' || var->expression.vtype != TYPE_FUNCTION) {
            if (parser->tok != '=') {
                parseerror(parser, "missing semicolon or initializer, got: `%s`", parser_tokval(parser));
                break;
            }

            if (!parser_next(parser)) {
                parseerror(parser, "error parsing initializer");
                break;
            }
        }
        else if (OPTS_OPTION_U32(OPTION_STANDARD) == COMPILER_QCC) {
            parseerror(parser, "expected '=' before function body in this standard");
        }

        if (parser->tok == '#') {
            ast_function *func   = NULL;
            ast_value    *number = NULL;
            float         fractional;
            float         integral;
            int           builtin_num;

            if (localblock) {
                parseerror(parser, "cannot declare builtins within functions");
                break;
            }
            if (var->expression.vtype != TYPE_FUNCTION) {
                parseerror(parser, "unexpected builtin number, '%s' is not a function", var->name);
                break;
            }
            if (!parser_next(parser)) {
                parseerror(parser, "expected builtin number");
                break;
            }

            if (OPTS_FLAG(EXPRESSIONS_FOR_BUILTINS)) {
                number = (ast_value*)parse_expression_leave(parser, true, false, false);
                if (!number) {
                    parseerror(parser, "builtin number expected");
                    break;
                }
                if (!ast_istype(number, ast_value) || !number->hasvalue || number->cvq != CV_CONST)
                {
                    ast_unref(number);
                    parseerror(parser, "builtin number must be a compile time constant");
                    break;
                }
                if (number->expression.vtype == TYPE_INTEGER)
                    builtin_num = number->constval.vint;
                else if (number->expression.vtype == TYPE_FLOAT)
                    builtin_num = number->constval.vfloat;
                else {
                    ast_unref(number);
                    parseerror(parser, "builtin number must be an integer constant");
                    break;
                }
                ast_unref(number);

                fractional = modff(builtin_num, &integral);
                if (builtin_num < 0 || fractional != 0) {
                    parseerror(parser, "builtin number must be an integer greater than zero");
                    break;
                }

                /* we only want the integral part anyways */
                builtin_num = integral;
            } else if (parser->tok == TOKEN_INTCONST) {
                builtin_num = parser_token(parser)->constval.i;
            } else {
                parseerror(parser, "builtin number must be a compile time constant");
                break;
            }

            if (var->hasvalue) {
                (void)!parsewarning(parser, WARN_DOUBLE_DECLARATION,
                                    "builtin `%s` has already been defined\n"
                                    " -> previous declaration here: %s:%i",
                                    var->name, ast_ctx(var).file, (int)ast_ctx(var).line);
            }
            else
            {
                func = ast_function_new(ast_ctx(var), var->name, var);
                if (!func) {
                    parseerror(parser, "failed to allocate function for `%s`", var->name);
                    break;
                }
                vec_push(parser->functions, func);

                func->builtin = -builtin_num-1;
            }

            if (OPTS_FLAG(EXPRESSIONS_FOR_BUILTINS)
                    ? (parser->tok != ',' && parser->tok != ';')
                    : (!parser_next(parser)))
            {
                parseerror(parser, "expected comma or semicolon");
                if (func)
                    ast_function_delete(func);
                var->constval.vfunc = NULL;
                break;
            }
        }
        else if (var->expression.vtype == TYPE_ARRAY && parser->tok == '{')
        {
            if (localblock) {
                /* Note that fteqcc and most others don't even *have*
                 * local arrays, so this is not a high priority.
                 */
                parseerror(parser, "TODO: initializers for local arrays");
                break;
            }
            /*
static ast_expression* parse_expression_leave(parser_t *parser, bool stopatcomma, bool truthvalue, bool with_labels);
*/
            parseerror(parser, "TODO: initializing global arrays is not supported yet!");
            break;
        }
        else if (var->expression.vtype == TYPE_FUNCTION && (parser->tok == '{' || parser->tok == '['))
        {
            if (localblock) {
                parseerror(parser, "cannot declare functions within functions");
                break;
            }

            if (proto)
                ast_ctx(proto) = parser_ctx(parser);

            if (!parse_function_body(parser, var))
                break;
            ast_delete(basetype);
            for (i = 0; i < vec_size(parser->gotos); ++i)
                parseerror(parser, "undefined label: `%s`", parser->gotos[i]->name);
            vec_free(parser->gotos);
            vec_free(parser->labels);
            return true;
        } else {
            ast_expression *cexp;
            ast_value      *cval;

            cexp = parse_expression_leave(parser, true, false, false);
            if (!cexp)
                break;

            if (!localblock) {
                cval = (ast_value*)cexp;
                if (cval != parser->nil &&
                    (!ast_istype(cval, ast_value) || ((!cval->hasvalue || cval->cvq != CV_CONST) && !cval->isfield))
                   )
                {
                    parseerror(parser, "cannot initialize a global constant variable with a non-constant expression");
                }
                else
                {
                    if (!OPTS_FLAG(INITIALIZED_NONCONSTANTS) &&
                        qualifier != CV_VAR)
                    {
                        var->cvq = CV_CONST;
                    }
                    if (cval == parser->nil)
                        var->expression.flags |= AST_FLAG_INITIALIZED;
                    else
                    {
                        var->hasvalue = true;
                        if (cval->expression.vtype == TYPE_STRING)
                            var->constval.vstring = parser_strdup(cval->constval.vstring);
                        else if (cval->expression.vtype == TYPE_FIELD)
                            var->constval.vfield = cval;
                        else
                            memcpy(&var->constval, &cval->constval, sizeof(var->constval));
                        ast_unref(cval);
                    }
                }
            } else {
                int cvq;
                shunt sy = { NULL, NULL, NULL, NULL };
                cvq = var->cvq;
                var->cvq = CV_NONE;
                vec_push(sy.out, syexp(ast_ctx(var), (ast_expression*)var));
                vec_push(sy.out, syexp(ast_ctx(cexp), (ast_expression*)cexp));
                vec_push(sy.ops, syop(ast_ctx(var), parser->assign_op));
                if (!parser_sy_apply_operator(parser, &sy))
                    ast_unref(cexp);
                else {
                    if (vec_size(sy.out) != 1 && vec_size(sy.ops) != 0)
                        parseerror(parser, "internal error: leaked operands");
                    if (!ast_block_add_expr(localblock, (ast_expression*)sy.out[0].out))
                        break;
                }
                vec_free(sy.out);
                vec_free(sy.ops);
                vec_free(sy.argc);
                var->cvq = cvq;
            }
        }

another:
        if (parser->tok == ',') {
            if (!parser_next(parser)) {
                parseerror(parser, "expected another variable");
                break;
            }

            if (parser->tok != TOKEN_IDENT) {
                parseerror(parser, "expected another variable");
                break;
            }
            var = ast_value_copy(basetype);
            cleanvar = true;
            ast_value_set_name(var, parser_tokval(parser));
            if (!parser_next(parser)) {
                parseerror(parser, "error parsing variable declaration");
                break;
            }
            continue;
        }

        if (parser->tok != ';') {
            parseerror(parser, "missing semicolon after variables");
            break;
        }

        if (!parser_next(parser)) {
            parseerror(parser, "parse error after variable declaration");
            break;
        }

        ast_delete(basetype);
        return true;
    }

    if (cleanvar && var)
        ast_delete(var);
    ast_delete(basetype);
    return false;

cleanup:
    ast_delete(basetype);
    if (cleanvar && var)
        ast_delete(var);
    if (me[0]) ast_member_delete(me[0]);
    if (me[1]) ast_member_delete(me[1]);
    if (me[2]) ast_member_delete(me[2]);
    return retval;
}

static bool parser_global_statement(parser_t *parser)
{
    int        cvq       = CV_WRONG;
    bool       noref     = false;
    bool       is_static = false;
    uint32_t   qflags    = 0;
    ast_value *istype    = NULL;
    char      *vstring   = NULL;

    if (parser->tok == TOKEN_IDENT)
        istype = parser_find_typedef(parser, parser_tokval(parser), 0);

    if (istype || parser->tok == TOKEN_TYPENAME || parser->tok == '.')
    {
        return parse_variable(parser, NULL, false, CV_NONE, istype, false, false, 0, NULL);
    }
    else if (parse_qualifiers(parser, false, &cvq, &noref, &is_static, &qflags, &vstring))
    {
        if (cvq == CV_WRONG)
            return false;
        return parse_variable(parser, NULL, true, cvq, NULL, noref, is_static, qflags, vstring);
    }
    else if (parser->tok == TOKEN_IDENT && !strcmp(parser_tokval(parser), "enum"))
    {
        return parse_enum(parser);
    }
    else if (parser->tok == TOKEN_KEYWORD)
    {
        if (!strcmp(parser_tokval(parser), "typedef")) {
            if (!parser_next(parser)) {
                parseerror(parser, "expected type definition after 'typedef'");
                return false;
            }
            return parse_typedef(parser);
        }
        parseerror(parser, "unrecognized keyword `%s`", parser_tokval(parser));
        return false;
    }
    else if (parser->tok == '#')
    {
        return parse_pragma(parser);
    }
    else if (parser->tok == '$')
    {
        if (!parser_next(parser)) {
            parseerror(parser, "parse error");
            return false;
        }
    }
    else
    {
        parseerror(parser, "unexpected token: `%s`", parser->lex->tok.value);
        return false;
    }
    return true;
}

static uint16_t progdefs_crc_sum(uint16_t old, const char *str)
{
    return util_crc16(old, str, strlen(str));
}

static void progdefs_crc_file(const char *str)
{
    /* write to progdefs.h here */
    (void)str;
}

static uint16_t progdefs_crc_both(uint16_t old, const char *str)
{
    old = progdefs_crc_sum(old, str);
    progdefs_crc_file(str);
    return old;
}

static void generate_checksum(parser_t *parser)
{
    uint16_t   crc = 0xFFFF;
    size_t     i;
    ast_value *value;

    crc = progdefs_crc_both(crc, "\n/* file generated by qcc, do not modify */\n\ntypedef struct\n{");
    crc = progdefs_crc_sum(crc, "\tint\tpad[28];\n");
    /*
    progdefs_crc_file("\tint\tpad;\n");
    progdefs_crc_file("\tint\tofs_return[3];\n");
    progdefs_crc_file("\tint\tofs_parm0[3];\n");
    progdefs_crc_file("\tint\tofs_parm1[3];\n");
    progdefs_crc_file("\tint\tofs_parm2[3];\n");
    progdefs_crc_file("\tint\tofs_parm3[3];\n");
    progdefs_crc_file("\tint\tofs_parm4[3];\n");
    progdefs_crc_file("\tint\tofs_parm5[3];\n");
    progdefs_crc_file("\tint\tofs_parm6[3];\n");
    progdefs_crc_file("\tint\tofs_parm7[3];\n");
    */
    for (i = 0; i < parser->crc_globals; ++i) {
        if (!ast_istype(parser->globals[i], ast_value))
            continue;
        value = (ast_value*)(parser->globals[i]);
        switch (value->expression.vtype) {
            case TYPE_FLOAT:    crc = progdefs_crc_both(crc, "\tfloat\t"); break;
            case TYPE_VECTOR:   crc = progdefs_crc_both(crc, "\tvec3_t\t"); break;
            case TYPE_STRING:   crc = progdefs_crc_both(crc, "\tstring_t\t"); break;
            case TYPE_FUNCTION: crc = progdefs_crc_both(crc, "\tfunc_t\t"); break;
            default:
                crc = progdefs_crc_both(crc, "\tint\t");
                break;
        }
        crc = progdefs_crc_both(crc, value->name);
        crc = progdefs_crc_both(crc, ";\n");
    }
    crc = progdefs_crc_both(crc, "} globalvars_t;\n\ntypedef struct\n{\n");
    for (i = 0; i < parser->crc_fields; ++i) {
        if (!ast_istype(parser->fields[i], ast_value))
            continue;
        value = (ast_value*)(parser->fields[i]);
        switch (value->expression.next->vtype) {
            case TYPE_FLOAT:    crc = progdefs_crc_both(crc, "\tfloat\t"); break;
            case TYPE_VECTOR:   crc = progdefs_crc_both(crc, "\tvec3_t\t"); break;
            case TYPE_STRING:   crc = progdefs_crc_both(crc, "\tstring_t\t"); break;
            case TYPE_FUNCTION: crc = progdefs_crc_both(crc, "\tfunc_t\t"); break;
            default:
                crc = progdefs_crc_both(crc, "\tint\t");
                break;
        }
        crc = progdefs_crc_both(crc, value->name);
        crc = progdefs_crc_both(crc, ";\n");
    }
    crc = progdefs_crc_both(crc, "} entvars_t;\n\n");

    parser->code->crc = crc;
}

parser_t *parser_create()
{
    parser_t *parser;
    lex_ctx empty_ctx;
    size_t i;

    parser = (parser_t*)mem_a(sizeof(parser_t));
    if (!parser)
        return NULL;

    memset(parser, 0, sizeof(*parser));

    if (!(parser->code = code_init())) {
        mem_d(parser);
        return NULL;
    }

    for (i = 0; i < operator_count; ++i) {
        if (operators[i].id == opid1('=')) {
            parser->assign_op = operators+i;
            break;
        }
    }
    if (!parser->assign_op) {
        printf("internal error: initializing parser: failed to find assign operator\n");
        mem_d(parser);
        return NULL;
    }

    vec_push(parser->variables, parser->htfields  = util_htnew(PARSER_HT_SIZE));
    vec_push(parser->variables, parser->htglobals = util_htnew(PARSER_HT_SIZE));
    vec_push(parser->typedefs, util_htnew(TYPEDEF_HT_SIZE));
    vec_push(parser->_blocktypedefs, 0);

    parser->aliases = util_htnew(PARSER_HT_SIZE);

    parser->ht_imm_string = util_htnew(512);

    /* corrector */
    vec_push(parser->correct_variables, correct_trie_new());
    vec_push(parser->correct_variables_score, NULL);

    empty_ctx.file = "<internal>";
    empty_ctx.line = 0;
    parser->nil = ast_value_new(empty_ctx, "nil", TYPE_NIL);
    parser->nil->cvq = CV_CONST;
    if (OPTS_FLAG(UNTYPED_NIL))
        util_htset(parser->htglobals, "nil", (void*)parser->nil);

    parser->max_param_count = 1;

    parser->const_vec[0] = ast_value_new(empty_ctx, "<vector.x>", TYPE_NOEXPR);
    parser->const_vec[1] = ast_value_new(empty_ctx, "<vector.y>", TYPE_NOEXPR);
    parser->const_vec[2] = ast_value_new(empty_ctx, "<vector.z>", TYPE_NOEXPR);

    if (OPTS_OPTION_BOOL(OPTION_ADD_INFO)) {
        parser->reserved_version = ast_value_new(empty_ctx, "reserved:version", TYPE_STRING);
        parser->reserved_version->cvq = CV_CONST;
        parser->reserved_version->hasvalue = true;
        parser->reserved_version->expression.flags |= AST_FLAG_INCLUDE_DEF;
        parser->reserved_version->constval.vstring = util_strdup(GMQCC_FULL_VERSION_STRING);
    } else {
        parser->reserved_version = NULL;
    }

    return parser;
}

static bool parser_compile(parser_t *parser)
{
    /* initial lexer/parser state */
    parser->lex->flags.noops = true;

    if (parser_next(parser))
    {
        while (parser->tok != TOKEN_EOF && parser->tok < TOKEN_ERROR)
        {
            if (!parser_global_statement(parser)) {
                if (parser->tok == TOKEN_EOF)
                    parseerror(parser, "unexpected eof");
                else if (compile_errors)
                    parseerror(parser, "there have been errors, bailing out");
                lex_close(parser->lex);
                parser->lex = NULL;
                return false;
            }
        }
    } else {
        parseerror(parser, "parse error");
        lex_close(parser->lex);
        parser->lex = NULL;
        return false;
    }

    lex_close(parser->lex);
    parser->lex = NULL;

    return !compile_errors;
}

bool parser_compile_file(parser_t *parser, const char *filename)
{
    parser->lex = lex_open(filename);
    if (!parser->lex) {
        con_err("failed to open file \"%s\"\n", filename);
        return false;
    }
    return parser_compile(parser);
}

bool parser_compile_string(parser_t *parser, const char *name, const char *str, size_t len)
{
    parser->lex = lex_open_string(str, len, name);
    if (!parser->lex) {
        con_err("failed to create lexer for string \"%s\"\n", name);
        return false;
    }
    return parser_compile(parser);
}

static void parser_remove_ast(parser_t *parser)
{
    size_t i;
    if (parser->ast_cleaned)
        return;
    parser->ast_cleaned = true;
    for (i = 0; i < vec_size(parser->accessors); ++i) {
        ast_delete(parser->accessors[i]->constval.vfunc);
        parser->accessors[i]->constval.vfunc = NULL;
        ast_delete(parser->accessors[i]);
    }
    for (i = 0; i < vec_size(parser->functions); ++i) {
        ast_delete(parser->functions[i]);
    }
    for (i = 0; i < vec_size(parser->imm_vector); ++i) {
        ast_delete(parser->imm_vector[i]);
    }
    for (i = 0; i < vec_size(parser->imm_string); ++i) {
        ast_delete(parser->imm_string[i]);
    }
    for (i = 0; i < vec_size(parser->imm_float); ++i) {
        ast_delete(parser->imm_float[i]);
    }
    for (i = 0; i < vec_size(parser->fields); ++i) {
        ast_delete(parser->fields[i]);
    }
    for (i = 0; i < vec_size(parser->globals); ++i) {
        ast_delete(parser->globals[i]);
    }
    vec_free(parser->accessors);
    vec_free(parser->functions);
    vec_free(parser->imm_vector);
    vec_free(parser->imm_string);
    util_htdel(parser->ht_imm_string);
    vec_free(parser->imm_float);
    vec_free(parser->globals);
    vec_free(parser->fields);

    for (i = 0; i < vec_size(parser->variables); ++i)
        util_htdel(parser->variables[i]);
    vec_free(parser->variables);
    vec_free(parser->_blocklocals);
    vec_free(parser->_locals);

    /* corrector */
    for (i = 0; i < vec_size(parser->correct_variables); ++i) {
        correct_del(parser->correct_variables[i], parser->correct_variables_score[i]);
    }
    vec_free(parser->correct_variables);
    vec_free(parser->correct_variables_score);


    for (i = 0; i < vec_size(parser->_typedefs); ++i)
        ast_delete(parser->_typedefs[i]);
    vec_free(parser->_typedefs);
    for (i = 0; i < vec_size(parser->typedefs); ++i)
        util_htdel(parser->typedefs[i]);
    vec_free(parser->typedefs);
    vec_free(parser->_blocktypedefs);

    vec_free(parser->_block_ctx);

    vec_free(parser->labels);
    vec_free(parser->gotos);
    vec_free(parser->breaks);
    vec_free(parser->continues);

    ast_value_delete(parser->nil);

    ast_value_delete(parser->const_vec[0]);
    ast_value_delete(parser->const_vec[1]);
    ast_value_delete(parser->const_vec[2]);

    util_htdel(parser->aliases);
    intrin_intrinsics_destroy(parser);
}

void parser_cleanup(parser_t *parser)
{
    parser_remove_ast(parser);
    code_cleanup(parser->code);

    mem_d(parser);
}

bool parser_finish(parser_t *parser, const char *output)
{
    size_t i;
    ir_builder *ir;
    bool retval = true;

    if (compile_errors) {
        con_out("*** there were compile errors\n");
        return false;
    }

    ir = ir_builder_new("gmqcc_out");
    if (!ir) {
        con_out("failed to allocate builder\n");
        return false;
    }

    for (i = 0; i < vec_size(parser->fields); ++i) {
        ast_value *field;
        bool hasvalue;
        if (!ast_istype(parser->fields[i], ast_value))
            continue;
        field = (ast_value*)parser->fields[i];
        hasvalue = field->hasvalue;
        field->hasvalue = false;
        if (!ast_global_codegen((ast_value*)field, ir, true)) {
            con_out("failed to generate field %s\n", field->name);
            ir_builder_delete(ir);
            return false;
        }
        if (hasvalue) {
            ir_value *ifld;
            ast_expression *subtype;
            field->hasvalue = true;
            subtype = field->expression.next;
            ifld = ir_builder_create_field(ir, field->name, subtype->vtype);
            if (subtype->vtype == TYPE_FIELD)
                ifld->fieldtype = subtype->next->vtype;
            else if (subtype->vtype == TYPE_FUNCTION)
                ifld->outtype = subtype->next->vtype;
            (void)!ir_value_set_field(field->ir_v, ifld);
        }
    }
    for (i = 0; i < vec_size(parser->globals); ++i) {
        ast_value *asvalue;
        if (!ast_istype(parser->globals[i], ast_value))
            continue;
        asvalue = (ast_value*)(parser->globals[i]);
        if (!asvalue->uses && !asvalue->hasvalue && asvalue->expression.vtype != TYPE_FUNCTION) {
            retval = retval && !compile_warning(ast_ctx(asvalue), WARN_UNUSED_VARIABLE,
                                                "unused global: `%s`", asvalue->name);
        }
        if (!ast_global_codegen(asvalue, ir, false)) {
            con_out("failed to generate global %s\n", asvalue->name);
            ir_builder_delete(ir);
            return false;
        }
    }
    /* Build function vararg accessor ast tree now before generating
     * immediates, because the accessors may add new immediates
     */
    for (i = 0; i < vec_size(parser->functions); ++i) {
        ast_function *f = parser->functions[i];
        if (f->varargs) {
            if (parser->max_param_count > vec_size(f->vtype->expression.params)) {
                f->varargs->expression.count = parser->max_param_count - vec_size(f->vtype->expression.params);
                if (!parser_create_array_setter_impl(parser, f->varargs)) {
                    con_out("failed to generate vararg setter for %s\n", f->name);
                    ir_builder_delete(ir);
                    return false;
                }
                if (!parser_create_array_getter_impl(parser, f->varargs)) {
                    con_out("failed to generate vararg getter for %s\n", f->name);
                    ir_builder_delete(ir);
                    return false;
                }
            } else {
                ast_delete(f->varargs);
                f->varargs = NULL;
            }
        }
    }
    /* Now we can generate immediates */
    for (i = 0; i < vec_size(parser->imm_float); ++i) {
        if (!ast_global_codegen(parser->imm_float[i], ir, false)) {
            con_out("failed to generate global %s\n", parser->imm_float[i]->name);
            ir_builder_delete(ir);
            return false;
        }
    }
    for (i = 0; i < vec_size(parser->imm_string); ++i) {
        if (!ast_global_codegen(parser->imm_string[i], ir, false)) {
            con_out("failed to generate global %s\n", parser->imm_string[i]->name);
            ir_builder_delete(ir);
            return false;
        }
    }
    for (i = 0; i < vec_size(parser->imm_vector); ++i) {
        if (!ast_global_codegen(parser->imm_vector[i], ir, false)) {
            con_out("failed to generate global %s\n", parser->imm_vector[i]->name);
            ir_builder_delete(ir);
            return false;
        }
    }
    for (i = 0; i < vec_size(parser->globals); ++i) {
        ast_value *asvalue;
        if (!ast_istype(parser->globals[i], ast_value))
            continue;
        asvalue = (ast_value*)(parser->globals[i]);
        if (!(asvalue->expression.flags & AST_FLAG_INITIALIZED))
        {
            if (asvalue->cvq == CV_CONST && !asvalue->hasvalue)
                (void)!compile_warning(ast_ctx(asvalue), WARN_UNINITIALIZED_CONSTANT,
                                       "uninitialized constant: `%s`",
                                       asvalue->name);
            else if ((asvalue->cvq == CV_NONE || asvalue->cvq == CV_CONST) && !asvalue->hasvalue)
                (void)!compile_warning(ast_ctx(asvalue), WARN_UNINITIALIZED_GLOBAL,
                                       "uninitialized global: `%s`",
                                       asvalue->name);
        }
        if (!ast_generate_accessors(asvalue, ir)) {
            ir_builder_delete(ir);
            return false;
        }
    }
    for (i = 0; i < vec_size(parser->fields); ++i) {
        ast_value *asvalue;
        asvalue = (ast_value*)(parser->fields[i]->next);

        if (!ast_istype((ast_expression*)asvalue, ast_value))
            continue;
        if (asvalue->expression.vtype != TYPE_ARRAY)
            continue;
        if (!ast_generate_accessors(asvalue, ir)) {
            ir_builder_delete(ir);
            return false;
        }
    }
    if (parser->reserved_version &&
        !ast_global_codegen(parser->reserved_version, ir, false))
    {
        con_out("failed to generate reserved::version");
        ir_builder_delete(ir);
        return false;
    }
    for (i = 0; i < vec_size(parser->functions); ++i) {
        ast_function *f = parser->functions[i];
        if (!ast_function_codegen(f, ir)) {
            con_out("failed to generate function %s\n", f->name);
            ir_builder_delete(ir);
            return false;
        }
    }

    generate_checksum(parser);
    if (OPTS_OPTION_BOOL(OPTION_DUMP))
        ir_builder_dump(ir, con_out);
    for (i = 0; i < vec_size(parser->functions); ++i) {
        if (!ir_function_finalize(parser->functions[i]->ir_func)) {
            con_out("failed to finalize function %s\n", parser->functions[i]->name);
            ir_builder_delete(ir);
            return false;
        }
    }
    parser_remove_ast(parser);

    if (compile_Werrors) {
        con_out("*** there were warnings treated as errors\n");
        compile_show_werrors();
        retval = false;
    }

    if (retval) {
        if (OPTS_OPTION_BOOL(OPTION_DUMPFIN))
            ir_builder_dump(ir, con_out);

        if (!ir_builder_generate(parser->code, ir, output)) {
            con_out("*** failed to generate output file\n");
            ir_builder_delete(ir);
            return false;
        }
    }
    ir_builder_delete(ir);
    return retval;
}