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%{
/*
qc-parse.y
parser for quakec
Copyright (C) 2001 Bill Currie <bill@taniwha.org>
Author: Bill Currie <bill@taniwha.org>
Date: 2001/06/12
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
static __attribute__ ((used)) const char rcsid[] =
"$Id$";
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#include <stdlib.h>
#include <QF/hash.h>
#include <QF/sys.h>
#include "class.h"
#include "debug.h"
#include "def.h"
#include "diagnostic.h"
#include "emit.h"
#include "expr.h"
#include "function.h"
#include "immediate.h"
#include "method.h"
#include "options.h"
#include "qfcc.h"
#include "reloc.h"
#include "strpool.h"
#include "struct.h"
#include "switch.h"
#include "symtab.h"
#include "type.h"
#define YYDEBUG 1
#define YYERROR_VERBOSE 1
#undef YYERROR_VERBOSE
extern char *yytext;
static void
yyerror (const char *s)
{
#ifdef YYERROR_VERBOSE
error (0, "%s %s\n", yytext, s);
#else
error (0, "%s before %s", s, yytext);
#endif
}
static void
parse_error (void)
{
error (0, "parse error before %s", yytext);
}
#define PARSE_ERROR do { parse_error (); YYERROR; } while (0)
int yylex (void);
%}
%union {
int op;
int size;
specifier_t spec;
void *pointer; // for ensuring pointer values are null
struct type_s *type;
struct expr_s *expr;
struct function_s *function;
struct switch_block_s *switch_block;
struct param_s *param;
struct method_s *method;
struct class_s *class;
struct category_s *category;
struct class_type_s *class_type;
struct protocol_s *protocol;
struct protocollist_s *protocol_list;
struct keywordarg_s *keywordarg;
struct methodlist_s *methodlist;
struct symbol_s *symbol;
struct symtab_s *symtab;
}
%nonassoc IFX
%nonassoc ELSE
%nonassoc BREAK_PRIMARY
%nonassoc ';'
%nonassoc CLASS_NOT_CATEGORY
%nonassoc STORAGEX
%left COMMA
%right <op> '=' ASX PAS /* pointer assign */
%right '?' ':'
%left OR
%left AND
%left '|'
%left '^'
%left '&'
%left EQ NE
%left LE GE LT GT
%left SHL SHR
%left '+' '-'
%left '*' '/' '%'
%right <op> UNARY INCOP
%left HYPERUNARY
%left '.' '(' '['
%token <symbol> CLASS_NAME NAME
%token <expr> CONST STRING
%token LOCAL RETURN WHILE DO IF ELSE FOR BREAK CONTINUE ELLIPSIS
%token NIL IFBE IFB IFAE IFA SWITCH CASE DEFAULT ENUM TYPEDEF
%token ARGS EXTERN STATIC SYSTEM SIZEOF OVERLOAD
%token <op> STRUCT
%token <type> TYPE
%token <symbol> TYPE_NAME
%token CLASS DEFS ENCODE END IMPLEMENTATION INTERFACE PRIVATE
%token PROTECTED PROTOCOL PUBLIC SELECTOR REFERENCE SELF THIS
%type <spec> optional_specifiers specifiers local_specifiers
%type <spec> storage_class
%type <spec> type_specifier type_specifier_or_storage_class
%type <spec> type
%type <param> function_params var_list param_declaration
%type <param> qc_func_params qc_var_list qc_param_decl
%type <symbol> var_decl function_decl
%type <symbol> abstract_decl abs_decl
%type <symbol> tag optional_tag
%type <spec> struct_specifier struct_def struct_decl
%type <spec> enum_specifier
%type <symbol> optional_enum_list enum_list enumerator_list enumerator
%type <symbol> enum_init
%type <size> array_decl
%type <spec> func_def_list comma
%type <expr> const string
%type <spec> ivar_decl decl decl_list
%type <spec> ivars
%type <param> param param_list
%type <symbol> methoddef
%type <expr> opt_initializer var_initializer local_def
%type <expr> opt_expr fexpr expr element_list element
%type <expr> optional_state_expr think opt_step texpr
%type <expr> statement statements compound_statement
%type <expr> label break_label continue_label
%type <expr> unary_expr primary cast_expr opt_arg_list arg_list
%type <switch_block> switch_block
%type <symbol> identifier
%type <symbol> overloaded_identifier
%type <expr> identifier_list
%type <symbol> selector reserved_word
%type <param> optional_param_list unaryselector keyworddecl
%type <param> keywordselector
%type <method> methodproto methoddecl
%type <expr> obj_expr obj_messageexpr obj_string receiver
%type <protocol_list> protocolrefs protocol_list
%type <keywordarg> messageargs keywordarg keywordarglist selectorarg
%type <keywordarg> keywordnamelist keywordname
%type <class> class_name new_class_name class_with_super
%type <class> classdef new_class_with_super
%type <category> category_name new_category_name
%type <protocol> protocol_name
%type <methodlist> methodprotolist methodprotolist2
%type <symtab> ivar_decl_list
%type <op> ci
%{
function_t *current_func;
class_type_t *current_class;
expr_t *local_expr;
vis_e current_visibility;
storage_class_t current_storage = st_global;
symtab_t *current_symtab;
static switch_block_t *switch_block;
static expr_t *break_label;
static expr_t *continue_label;
/* When defining a new symbol, already existing symbols must be in a
different scope. However, when they are in a different scope, we want a
truly new symbol.
*/
static symbol_t *
check_redefined (symbol_t *sym)
{
if (sym->table == current_symtab)
error (0, "%s redefined", sym->name);
if (sym->table) // truly new symbols are not in any symbol table
sym = new_symbol (sym->name);
return sym;
}
/* Check for undefined symbols. If the symbol is undefined, default its type
to float or int, depending on compiler mode.
*/
static symbol_t *
check_undefined (symbol_t *sym)
{
if (!sym->table) { // truly new symbols are not in any symbol table
error (0, "%s undefined", sym->name);
if (options.code.progsversion == PROG_ID_VERSION)
sym->type = &type_float;
else
sym->type = &type_integer;
}
return sym;
}
static specifier_t
make_spec (type_t *type, storage_class_t storage, int is_typedef,
int is_overload)
{
specifier_t spec;
memset (&spec, 0, sizeof (spec));
spec.type = type;
spec.storage = storage;
spec.is_typedef = is_typedef;
spec.is_overload = is_overload;
if (spec.storage && spec.is_typedef)
internal_error (0, "setting both storage and is_typedef");
return spec;
}
static specifier_t
spec_merge (specifier_t spec, specifier_t new)
{
if (new.type) {
if (spec.type && !spec.multi_type) {
error (0, "two or more data types in declaration specifiers");
spec.multi_type = 1;
}
spec.type = new.type;
}
if (new.is_typedef || new.storage) {
if ((spec.is_typedef || spec.storage) && !spec.multi_store) {
error (0, "multiple storage classes in declaration specifiers");
spec.multi_store = 1;
}
spec.storage = new.storage;
spec.is_typedef = new.is_typedef;
}
spec.is_overload |= new.is_overload;
return spec;
}
%}
%expect 0
%%
external_def_list
: /* empty */
{
current_symtab = pr.symtab;
current_storage = st_global;
}
| external_def_list external_def
| external_def_list obj_def
| error END { current_class = 0; yyerrok; current_symtab = pr.symtab; }
| error ';' { yyerrok; current_symtab = pr.symtab; }
| error '}' { yyerrok; current_symtab = pr.symtab; }
;
external_def
: optional_specifiers external_decl_list ';' { }
| optional_specifiers ';' { }
| optional_specifiers qc_func_params
{
type_t **type;
$<spec>$ = $1; // copy spec bits and storage
// .float () foo; is a field holding a function variable rather
// than a function that returns a float field.
for (type = &$<spec>$.type; *type && (*type)->type == ev_field;
type = &(*type)->t.fldptr.type)
;
*type = parse_params (*type, $2);
$<spec>$.type = find_type ($<spec>$.type);
if ($<spec>$.type->type != ev_field)
$<spec>$.params = $2;
}
function_def_list
| optional_specifiers function_decl function_body
| storage_class '{' { current_storage = $1.storage; }
external_def_list '}' ';' { current_storage = st_global; }
;
function_body
: optional_state_expr
{
symbol_t *sym = $<symbol>0;
sym->type = find_type (append_type (sym->type, $<spec>-1.type));
$<symbol>$ = function_symbol (sym, $<spec>-1.is_overload, 1);
}
{
$<symtab>$ = current_symtab;
current_func = begin_function ($<symbol>2, 0, current_symtab, 0);
current_symtab = current_func->symtab;
current_storage = st_local;
}
compound_statement
{
build_code_function ($<symbol>2, $1, $4);
current_symtab = $<symtab>3;
current_storage = st_global;
current_func = 0;
}
| '=' '#' expr ';'
{
symbol_t *sym = $<symbol>0;
sym->type = find_type (append_type (sym->type, $<spec>-1.type));
sym = function_symbol (sym, $<spec>-1.is_overload, 1);
build_builtin_function (sym, $3, 0);
}
;
external_decl_list
: external_decl
| external_decl_list ',' { $<spec>$ = $<spec>0; } external_decl
;
external_decl
: var_decl
{
specifier_t spec = $<spec>0;
type_t *type;
type = find_type (append_type ($1->type, spec.type));
if (spec.is_typedef) {
$1->type = type;
$1->sy_type = sy_type;
symtab_addsymbol (current_symtab, $1);
} else {
initialize_def ($1, type, 0, current_symtab->space,
spec.storage);
}
}
| var_decl var_initializer
{
specifier_t spec = $<spec>0;
type_t *type;
type = find_type (append_type ($1->type, spec.type));
if (spec.is_typedef) {
error (0, "typedef %s is initialized", $1->name);
$1->type = type;
$1->sy_type = sy_type;
symtab_addsymbol (current_symtab, $1);
} else {
initialize_def ($1, type, $2, current_symtab->space,
spec.storage);
}
}
| function_decl
{
specifier_t spec = $<spec>0;
$1->type = find_type (append_type ($1->type, spec.type));
if (spec.is_typedef) {
$1->sy_type = sy_type;
symtab_addsymbol (current_symtab, $1);
} else {
$1 = function_symbol ($1, spec.is_overload, 1);
make_function ($1, 0, $1->table->space, spec.storage);
}
}
;
storage_class
: EXTERN { $$ = make_spec (0, st_extern, 0, 0); }
| STATIC { $$ = make_spec (0, st_static, 0, 0); }
| SYSTEM { $$ = make_spec (0, st_system, 0, 0); }
| TYPEDEF { $$ = make_spec (0, st_global, 1, 0); }
| OVERLOAD { $$ = make_spec (0, current_storage, 0, 1); }
;
optional_specifiers
: specifiers
| /* empty */
{
$$ = make_spec (0, current_storage, 0, 0);
}
;
specifiers
: type_specifier_or_storage_class
| specifiers type_specifier_or_storage_class
{
$$ = spec_merge ($1, $2);
}
;
type
: type_specifier
| type type_specifier
;
type_specifier_or_storage_class
: type_specifier
| storage_class
;
type_specifier
: TYPE
{
$$ = make_spec ($1, current_storage, 0, 0);
}
| enum_specifier
| struct_specifier
| TYPE_NAME
{
$$ = make_spec ($1->type, current_storage, 0, 0);
}
| CLASS_NAME
{
$$ = make_spec ($1->type, current_storage, 0, 0);
}
// NOTE: fields don't parse the way they should. This is not a problem
// for basic types, but functions need special treatment
| '.' type_specifier
{
// avoid find_type()
$$ = make_spec (field_type (0), current_storage, 0, 0);
$$.type = append_type ($$.type, $2.type);
}
;
optional_tag
: tag
| /* empty */ { $$ = 0; }
;
tag : NAME ;
enum_specifier
: ENUM tag optional_enum_list
{
$$ = make_spec ($3->type, current_storage, 0, 0);
if (!$3->table)
symtab_addsymbol (current_symtab, $3);
}
| ENUM enum_list
{
$$ = make_spec ($2->type, current_storage, 0, 0);
if (!$2->table)
symtab_addsymbol (current_symtab, $2);
}
;
optional_enum_list
: enum_list
| /* empty */ { $$ = find_enum ($<symbol>0); }
;
enum_list
: '{' enum_init enumerator_list optional_comma '}' { $$ = $3; }
;
enum_init
: /* empty */
{
$$ = find_enum ($<symbol>-1);
start_enum ($$);
}
;
enumerator_list
: enumerator { $$ = $<symbol>0; }
| enumerator_list ',' { $<symbol>$ = $<symbol>0; }
enumerator { $$ = $<symbol>0; }
;
enumerator
: identifier { add_enum ($<symbol>0, $1, 0); }
| identifier '=' fexpr { add_enum ($<symbol>0, $1, $3); }
;
struct_specifier
: STRUCT optional_tag '{'
{
symbol_t *sym;
sym = find_struct ($1, $2, 0);
if (!sym->table)
symtab_addsymbol (current_symtab, sym);
current_symtab = new_symtab (current_symtab, stab_local);
}
struct_defs '}'
{
symbol_t *sym;
symtab_t *symtab = current_symtab;
current_symtab = symtab->parent;
sym = build_struct ($1, $2, symtab, 0);
$$ = make_spec (sym->type, current_storage, 0, 0);
if (!sym->table)
symtab_addsymbol (current_symtab, sym);
}
| STRUCT tag
{
symbol_t *sym;
sym = find_struct ($1, $2, 0);
$$ = make_spec (sym->type, current_storage, 0, 0);
if (!sym->table)
symtab_addsymbol (current_symtab, sym);
}
;
struct_defs
: /* empty */ //FIXME for new syntax
| struct_defs struct_def ';'
| DEFS '(' identifier ')'
{
$3 = check_undefined ($3);
if (!$3->type || !is_class ($3->type)) {
error (0, "`%s' is not a class", $3->name);
} else {
// replace the struct symbol table with one built from
// the class ivars and the current struct fields. ivars
// will replace any fields of the same name.
current_symtab = class_to_struct ($3->type->t.class,
current_symtab);
}
}
;
struct_def
: type struct_decl_list
| type
;
struct_decl_list
: struct_decl_list ',' { $<spec>$ = $<spec>0; } struct_decl
| struct_decl
;
struct_decl
: function_decl
{
$1->type = append_type ($1->type, $<spec>0.type);
$1->type = find_type ($1->type);
symtab_addsymbol (current_symtab, $1);
}
| var_decl
{
$1->type = append_type ($1->type, $<spec>0.type);
$1->type = find_type ($1->type);
symtab_addsymbol (current_symtab, $1);
}
| var_decl ':' expr %prec COMMA {}
| ':' expr %prec COMMA {}
;
//FIXME function overloading
var_decl
: NAME %prec COMMA
{
$$ = $1;
// due to the way declarations work, we need a new symbol at all
// times. redelcarations will be checked later
if ($$->table)
$$ = new_symbol ($1->name);
$$->type = 0;
}
| var_decl function_params
{
$$->type = append_type ($$->type, parse_params (0, $2));
}
| var_decl array_decl
{
$$->type = append_type ($$->type, array_type (0, $2));
}
| '*' var_decl %prec UNARY
{
$$ = $2;
$$->type = append_type ($$->type, pointer_type (0));
}
| '(' var_decl ')' { $$ = $2; }
;
//FIXME function overloading
function_decl
: '*' function_decl
{
$$ = $2;
$$->type = append_type ($$->type, pointer_type (0));
}
| function_decl array_decl
{
$$ = $1;
$$->type = append_type ($$->type, array_type (0, $2));
}
| '(' function_decl ')' { $$ = $2; }
| function_decl function_params
{
$$ = $1;
$$->params = $2;
$$->type = append_type ($$->type, parse_params (0, $2));
}
| NAME function_params
{
$$ = $1;
$$->params = $2;
$$->type = parse_params (0, $2);
}
;
function_params
: '(' ')' { $$ = 0; }
| '(' ps var_list ')' { $$ = check_params ($3); }
;
qc_func_params
: '(' ')' { $$ = 0; }
| '(' ps qc_var_list ')' { $$ = check_params ($3); }
| '(' ps TYPE ')'
{
if ($3 != &type_void)
PARSE_ERROR;
$$ = 0;
}
;
ps : ;
var_list
: param_declaration
| var_list ',' param_declaration
{
param_t *p;
for (p = $1; p->next; p = p->next)
;
p->next = $3;
$$ = $1;
}
;
qc_var_list
: qc_param_decl
| qc_var_list ',' qc_param_decl
{
param_t *p;
for (p = $1; p->next; p = p->next)
;
p->next = $3;
$$ = $1;
}
;
param_declaration
: type var_decl
{
$2->type = find_type (append_type ($2->type, $1.type));
$$ = new_param (0, $2->type, $2->name);
}
| abstract_decl { $$ = new_param (0, $1->type, 0); }
| ELLIPSIS { $$ = new_param (0, 0, 0); }
;
abstract_decl
: type abs_decl
{
$$ = $2;
$$->type = find_type (append_type ($$->type, $1.type));
}
;
qc_param_decl
: type NAME
{
$2->type = find_type ($1.type);
$$ = new_param (0, $2->type, $2->name);
}
| type qc_func_params NAME
{
type_t **type;
// .float () foo; is a field holding a function variable rather
// than a function that returns a float field.
for (type = &$1.type; *type && (*type)->type == ev_field;
type = &(*type)->t.fldptr.type)
;
*type = parse_params (*type, $2);
$3->type = find_type ($1.type);
if ($3->type->type != ev_field)
$3->params = $2;
$$ = new_param (0, $3->type, $3->name);
}
| ELLIPSIS { $$ = new_param (0, 0, 0); }
;
abs_decl
: /* empty */ { $$ = new_symbol (""); }
| '(' abs_decl ')' function_params
{
$$ = $2;
$$->type = append_type ($$->type, parse_params (0, $4));
}
| '*' abs_decl
{
$$ = $2;
$$->type = append_type ($$->type, pointer_type (0));
}
| abs_decl array_decl
{
$$ = $1;
$$->type = append_type ($$->type, array_type (0, $2));
}
| '(' abs_decl ')'
{
$$ = $2;
}
;
array_decl
: '[' fexpr ']'
{
$2 = fold_constants ($2);
if (!is_integer_val ($2) || expr_integer ($2) < 1) {
error (0, "invalid array size");
$$ = 0;
} else {
$$ = expr_integer ($2);
}
}
| '[' ']' { $$ = 0; }
;
local_specifiers
: LOCAL specifiers { $$ = $2; }
| specifiers { $$ = $1; }
;
param_list
: param { $$ = $1; }
| param_list ',' { $<param>$ = $<param>1; } param { $$ = $4; }
;
param
: type identifier
{
$2 = check_redefined ($2);
$$ = param_append_identifiers ($<param>0, $2, $1.type);
}
;
decl_list
: decl_list ',' { $<spec>$ = $<spec>0; } decl
| decl
;
decl
: function_decl {}
| var_decl opt_initializer
{
specifier_t spec = $<spec>0;
type_t *type;
type = find_type (append_type ($1->type, spec.type));
initialize_def ($1, type, $2, current_symtab->space,
$<spec>0.storage);
}
;
function_def_list
: func_def_list comma func_def_list_term
| func_def_list_term
;
func_def_list
: func_def_list comma func_def { $$ = $2; }
| func_def { $$ = $<spec>0; }
;
/* This rule is used only to get an action before both func_def and
func_def_list_term so that the function spec can be inherited.
*/
comma: ',' { $$ = $<spec>0; }
func_def_list_term
: non_code_funcion ';'
| code_function ';'
| code_function %prec IFX
;
func_def
: non_code_funcion
| code_function
;
code_function
: overloaded_identifier code_func
;
non_code_funcion
: overloaded_identifier non_code_func
;
overloaded_identifier
: identifier
{
$$ = $1;
$$->type = $<spec>0.type;
if ($$->type->type != ev_field) {
$$ = function_symbol ($$, $<spec>0.is_overload, 1);
$$->params = $<spec>0.params;
}
}
;
non_code_func
: '=' '#' fexpr
{
build_builtin_function ($<symbol>0, $3, 0);
}
| '=' fexpr
{
symbol_t *sym = $<symbol>0;
specifier_t spec = $<spec>-1;
initialize_def (sym, sym->type, $2, current_symtab->space,
spec.storage);
}
| /* emtpy */
{
symbol_t *sym = $<symbol>0;
specifier_t spec = $<spec>-1;
if (sym->type->type != ev_field) {
make_function (sym, 0, sym->table->space, spec.storage);
} else {
initialize_def (sym, sym->type, 0, current_symtab->space,
spec.storage);
}
}
;
code_func
: '=' optional_state_expr
{
$<symtab>$ = current_symtab;
current_func = begin_function ($<symbol>0, 0, current_symtab, 0);
current_symtab = current_func->symtab;
current_storage = st_local;
}
compound_statement
{
build_code_function ($<symbol>0, $2, $4);
current_symtab = $<symtab>3;
current_storage = st_global;
current_func = 0;
}
;
opt_initializer
: /*empty*/ { $$ = 0; }
| var_initializer { $$ = $1; }
;
var_initializer
: '=' fexpr { $$ = $2; }
| '=' '{' element_list optional_comma '}' { $$ = $3; }
;
optional_state_expr
: /* emtpy */ { $$ = 0; }
| '[' fexpr ',' think opt_step ']' { $$ = build_state_expr ($2, $4, $5); }
;
think
: identifier
{
internal_error (0, "FIXME");
}
| '(' fexpr ')'
{
$$ = $2;
}
;
opt_step
: ',' fexpr { $$ = $2; }
| /* empty */ { $$ = 0; }
;
element_list
: element
{
$$ = new_block_expr ();
append_expr ($$, $1);
}
| element_list ',' element
{
append_expr ($$, $3);
}
;
element
: '{' element_list optional_comma '}' { $$ = $2; }
| fexpr { $$ = $1; }
;
optional_comma
: /* empty */
| ','
;
compound_statement
: '{'
{
if (!options.traditional) {
current_symtab = new_symtab (current_symtab, stab_local);
current_symtab->space = current_symtab->parent->space;
}
}
statements '}'
{
if (!options.traditional)
current_symtab = current_symtab->parent;
$$ = $3;
}
;
statements
: /*empty*/
{
$$ = new_block_expr ();
}
| statements statement
{
$$ = append_expr ($1, $2);
}
;
local_def
: local_specifiers
{
$<spec>$ = $1;
local_expr = new_block_expr ();
}
decl_list ';'
{
$$ = local_expr;
local_expr = 0;
}
statement
: ';' { $$ = 0; }
| error ';' { $$ = 0; yyerrok; }
| compound_statement { $$ = $1; }
| local_def { $$ = $1; }
| RETURN opt_expr ';'
{
$$ = return_expr (current_func, $2);
}
| BREAK ';'
{
$$ = 0;
if (break_label)
$$ = goto_expr (break_label);
else
error (0, "break outside of loop or switch");
}
| CONTINUE ';'
{
$$ = 0;
if (continue_label)
$$ = goto_expr (continue_label);
else
error (0, "continue outside of loop");
}
| CASE fexpr ':'
{
$$ = case_label_expr (switch_block, $2);
}
| DEFAULT ':'
{
$$ = case_label_expr (switch_block, 0);
}
| SWITCH break_label switch_block '(' fexpr ')' compound_statement
{
switch_block->test = $5;
$$ = switch_expr (switch_block, break_label, $7);
switch_block = $3;
break_label = $2;
}
| IF '(' texpr ')' statement %prec IFX
{
$$ = build_if_statement ($3, $5, 0);
}
| IF '(' texpr ')' statement ELSE statement
{
$$ = build_if_statement ($3, $5, $7);
}
| FOR break_label continue_label
'(' opt_expr ';' opt_expr ';' opt_expr ')' statement
{
$$ = build_for_statement ($5, $7, $9, $11,
break_label, continue_label);
break_label = $2;
continue_label = $3;
}
| WHILE break_label continue_label '(' texpr ')' statement
{
$$ = build_while_statement ($5, $7, break_label, continue_label);
break_label = $2;
continue_label = $3;
}
| DO break_label continue_label statement WHILE '(' texpr ')' ';'
{
$$ = build_do_while_statement ($4, $7,
break_label, continue_label);
break_label = $2;
continue_label = $3;
}
| fexpr ';'
{
$$ = $1;
}
;
label
: /* empty */
{
$$ = new_label_expr ();
}
;
break_label
: /* empty */
{
$$ = break_label;
break_label = new_label_expr ();
}
;
continue_label
: /* empty */
{
$$ = continue_label;
continue_label = new_label_expr ();
}
;
switch_block
: /* empty */
{
$$ = switch_block;
switch_block = new_switch_block ();
}
;
opt_expr
: fexpr
| /* empty */
{
$$ = 0;
}
;
unary_expr
: primary
| '+' cast_expr %prec UNARY { $$ = $2; }
| '-' cast_expr %prec UNARY { $$ = unary_expr ('-', $2); }
| '!' cast_expr %prec UNARY { $$ = unary_expr ('!', $2); }
| '~' cast_expr %prec UNARY { $$ = unary_expr ('~', $2); }
| '&' cast_expr %prec UNARY { $$ = address_expr ($2, 0, 0); }
| '*' cast_expr %prec UNARY { $$ = pointer_expr ($2); }
| SIZEOF unary_expr %prec UNARY { $$ = sizeof_expr ($2, 0); }
| SIZEOF '(' abstract_decl ')' %prec HYPERUNARY
{
$$ = sizeof_expr (0, $3->type);
}
;
primary
: NAME { $$ = new_symbol_expr ($1); }
| BREAK %prec BREAK_PRIMARY { $$ = new_name_expr (save_string ("break")); }
| ARGS { $$ = new_name_expr (".args"); }
| SELF { $$ = new_self_expr (); }
| THIS { $$ = new_this_expr (); }
| const { $$ = $1; }
| '(' expr ')' { $$ = $2; $$->paren = 1; }
| primary '(' opt_arg_list ')' { $$ = function_expr ($1, $3); }
| primary '[' expr ']' { $$ = array_expr ($1, $3); }
| primary '.' primary { $$ = binary_expr ('.', $1, $3); }
| INCOP primary { $$ = incop_expr ($1, $2, 0); }
| primary INCOP { $$ = incop_expr ($2, $1, 1); }
| obj_expr { $$ = $1; }
;
cast_expr
: unary_expr
| '(' abstract_decl ')' cast_expr %prec UNARY
{
$$ = cast_expr ($2->type, $4);
}
;
expr
: cast_expr
| expr '=' expr { $$ = assign_expr ($1, $3); }
| expr ASX expr { $$ = asx_expr ($2, $1, $3); }
| expr '?' expr ':' expr { $$ = conditional_expr ($1, $3, $5); }
| expr AND label expr { $$ = bool_expr (AND, $3, $1, $4); }
| expr OR label expr { $$ = bool_expr (OR, $3, $1, $4); }
| expr EQ expr { $$ = binary_expr (EQ, $1, $3); }
| expr NE expr { $$ = binary_expr (NE, $1, $3); }
| expr LE expr { $$ = binary_expr (LE, $1, $3); }
| expr GE expr { $$ = binary_expr (GE, $1, $3); }
| expr LT expr { $$ = binary_expr (LT, $1, $3); }
| expr GT expr { $$ = binary_expr (GT, $1, $3); }
| expr SHL expr { $$ = binary_expr (SHL, $1, $3); }
| expr SHR expr { $$ = binary_expr (SHR, $1, $3); }
| expr '+' expr { $$ = binary_expr ('+', $1, $3); }
| expr '-' expr { $$ = binary_expr ('-', $1, $3); }
| expr '*' expr { $$ = binary_expr ('*', $1, $3); }
| expr '/' expr { $$ = binary_expr ('/', $1, $3); }
| expr '&' expr { $$ = binary_expr ('&', $1, $3); }
| expr '|' expr { $$ = binary_expr ('|', $1, $3); }
| expr '^' expr { $$ = binary_expr ('^', $1, $3); }
| expr '%' expr { $$ = binary_expr ('%', $1, $3); }
;
fexpr
: expr { $$ = fold_constants ($1); }
;
texpr
: fexpr { $$ = convert_bool ($1, 1); }
;
opt_arg_list
: /* emtpy */ { $$ = 0; }
| arg_list { $$ = $1; }
;
arg_list
: fexpr
| arg_list ',' fexpr
{
$3->next = $1;
$$ = $3;
}
;
const
: CONST
| NIL { $$ = new_nil_expr (); }
| string
;
string
: STRING
| string STRING { $$ = binary_expr ('+', $1, $2); }
;
identifier
: NAME
| BREAK
{
if (!($$ = symtab_lookup (current_symtab, "break")))
$$ = new_symbol ("break");
}
| CLASS_NAME
| TYPE_NAME
;
// Objective-QC stuff
obj_def
: classdef { }
| classdecl
| protocoldef
| { if (!current_class) PARSE_ERROR; } methoddef
| END
{
if (!current_class)
PARSE_ERROR;
else
class_finish (current_class);
current_class = 0;
}
;
identifier_list
: identifier
{
$$ = append_expr (new_block_expr (), new_symbol_expr ($1));
}
| identifier_list ',' identifier
{
$$ = append_expr ($1, new_symbol_expr ($3));
}
;
classdecl
: CLASS identifier_list ';'
{
expr_t *e;
for (e = $2->e.block.head; e; e = e->next) {
get_class (e->e.symbol, 1);
if (!e->e.symbol->table)
symtab_addsymbol (current_symtab, e->e.symbol);
}
}
;
class_name
: identifier %prec CLASS_NOT_CATEGORY
{
$1 = check_undefined ($1);
if (!$1->type || !is_class ($1->type)) {
error (0, "`%s' is not a class %p", $1->name, $1->type);
$$ = get_class (0, 1);
} else {
$$ = $1->type->t.class;
}
}
;
new_class_name
: identifier
{
$$ = get_class ($1, 0);
if (!$$) {
$1 = check_redefined ($1);
$$ = get_class ($1, 1);
}
current_class = &$$->class_type;
if (!$1->table)
symtab_addsymbol (current_symtab, $1);
}
;
class_with_super
: class_name ':' class_name
{
if ($1->super_class != $3)
error (0, "%s is not a super class of %s", $3->name, $1->name);
$$ = $1;
}
;
new_class_with_super
: new_class_name ':' class_name
{
$1->super_class = $3;
$$ = $1;
}
;
category_name
: identifier '(' identifier ')'
{
$$ = get_category ($1, $3->name, 0);
if (!$$) {
error (0, "undefined category `%s (%s)'", $1->name, $3->name);
$$ = get_category (0, 0, 1);
}
}
;
new_category_name
: identifier '(' identifier ')'
{
$$ = get_category ($1, $3->name, 1);
if ($$->defined) {
error (0, "redefinition of category `%s (%s)'",
$1->name, $3->name);
$$ = get_category (0, 0, 1);
}
current_class = &$$->class_type;
}
;
class_reference
: identifier
{
emit_class_ref ($1->name);
}
;
category_reference
: identifier '(' identifier ')'
{
emit_category_ref ($1->name, $3->name);
}
;
protocol_name
: identifier
{
$$ = get_protocol ($1->name, 0);
if ($$) {
error (0, "redefinition of %s", $1->name);
$$ = get_protocol (0, 1);
} else {
$$ = get_protocol ($1->name, 1);
}
current_class = &$$->class_type;
}
;
classdef
: INTERFACE new_class_name
protocolrefs { class_add_protocols ($2, $3); }
'{' { $<class>$ = $2; }
ivar_decl_list '}'
{
class_add_ivars ($2, $7);
$<class>$ = $2;
}
methodprotolist { class_add_methods ($2, $10); }
END
{
current_class = 0;
(void) ($<class>6);
(void) ($<class>9);
}
| INTERFACE new_class_name
protocolrefs { class_add_protocols ($2, $3); }
{
class_add_ivars ($2, class_new_ivars ($2));
$<class>$ = $2;
}
methodprotolist { class_add_methods ($2, $6); }
END
{
current_class = 0;
(void) ($<class>5);
}
| INTERFACE new_class_with_super
protocolrefs { class_add_protocols ($2, $3);}
'{' { $<class>$ = $2; }
ivar_decl_list '}'
{
class_add_ivars ($2, $7);
$<class>$ = $2;
}
methodprotolist { class_add_methods ($2, $10); }
END
{
current_class = 0;
(void) ($<class>6);
(void) ($<class>9);
}
| INTERFACE new_class_with_super
protocolrefs { class_add_protocols ($2, $3); }
{
class_add_ivars ($2, class_new_ivars ($2));
$<class>$ = $2;
}
methodprotolist { class_add_methods ($2, $6); }
END
{
current_class = 0;
(void) ($<class>5);
}
| INTERFACE new_category_name
protocolrefs
{
category_add_protocols ($2, $3);
$<class>$ = $2->class;
}
methodprotolist { category_add_methods ($2, $5); }
END
{
current_class = 0;
(void) ($<class>4);
}
| IMPLEMENTATION class_name { class_begin (&$2->class_type); }
'{' { $<class>$ = $2; }
ivar_decl_list '}'
{
class_check_ivars ($2, $6);
(void) ($<class>5);
}
| IMPLEMENTATION class_name { class_begin (&$2->class_type); }
| IMPLEMENTATION class_with_super { class_begin (&$2->class_type); }
'{' { $<class>$ = $2; }
ivar_decl_list '}'
{
class_check_ivars ($2, $6);
(void) ($<class>5);
}
| IMPLEMENTATION class_with_super { class_begin (&$2->class_type); }
| IMPLEMENTATION category_name { class_begin (&$2->class_type); }
| REFERENCE class_reference ';' { }
| REFERENCE category_reference ';' { }
;
protocoldef
: PROTOCOL protocol_name
protocolrefs { protocol_add_protocols ($2, $3); $<class>$ = 0; }
methodprotolist { protocol_add_methods ($2, $5); }
END { current_class = 0; (void) ($<class>4); }
;
protocolrefs
: /* emtpy */ { $$ = 0; }
| LT { $<protocol_list>$ = new_protocol_list (); }
protocol_list GT { $$ = $3; (void) ($<protocol_list>2); }
;
protocol_list
: identifier
{
$$ = add_protocol ($<protocol_list>0, $1->name);
}
| protocol_list ',' identifier
{
$$ = add_protocol ($1, $3->name);
}
;
ivar_decl_list
: /* empty */
{
symtab_t *tab, *ivars;
ivars = class_new_ivars ($<class>0);
for (tab = ivars; tab->parent; tab = tab->parent)
;
if (tab == current_symtab)
internal_error (0, "ivars already linked to parent scope");
$<symtab>$ = tab;
tab->parent = current_symtab;
current_symtab = ivars;
current_visibility = vis_protected;
}
ivar_decl_list_2
{
symtab_t *tab = $<symtab>1;
$$ = current_symtab;
current_symtab = tab->parent;
tab->parent = 0;
tab = $$->parent; // preserve the ivars inheritance chain
build_struct ('s', 0, $$, 0);
$$->parent = tab;
}
;
ivar_decl_list_2
: ivar_decl_list_2 visibility_spec ivar_decls
| ivar_decls
;
visibility_spec
: PRIVATE { current_visibility = vis_private; }
| PROTECTED { current_visibility = vis_protected; }
| PUBLIC { current_visibility = vis_public; }
;
ivar_decls
: /* empty */
| ivar_decls ivar_decl ';'
;
ivar_decl
: type ivars
;
ivars
: struct_decl
| ivars ',' { $<spec>$ = $<spec>0; } struct_decl
;
methoddef
: ci methoddecl optional_state_expr
{
method_t *method = $2;
method->instance = $1;
$2 = method = class_find_method (current_class, method);
$<symbol>$ = method_symbol (current_class, method);
}
{
method_t *method = $2;
const char *nicename = method_name (method);
symbol_t *sym = $<symbol>4;
symtab_t *ivar_scope;
$<symtab>$ = current_symtab;
ivar_scope = class_ivar_scope (current_class, current_symtab);
current_func = begin_function (sym, nicename, ivar_scope, 1);
class_finish_ivar_scope (current_class, ivar_scope,
current_func->symtab);
method->func = sym->s.func;
method->def = sym->s.func->def;
current_symtab = current_func->symtab;
current_storage = st_local;
}
compound_statement
{
build_code_function ($<symbol>4, $3, $6);
current_symtab = $<symtab>5;
current_storage = st_global;
current_func = 0;
}
| ci methoddecl '=' '#' const ';'
{
symbol_t *sym;
method_t *method = $2;
method->instance = $1;
method = class_find_method (current_class, method);
sym = method_symbol (current_class, method);
build_builtin_function (sym, $5, 1);
method->def = sym->s.func->def;
}
;
ci
: '+' { $$ = 0; }
| '-' { $$ = 1; }
;
methodprotolist
: /* emtpy */ { $$ = 0; }
| methodprotolist2
;
methodprotolist2
: { } methodproto
{
$$ = new_methodlist ();
add_method ($$, $2);
}
| methodprotolist2 methodproto
{
add_method ($1, $2);
$$ = $1;
}
;
methodproto
: '+' methoddecl ';'
{
$2->instance = 0;
$$ = $2;
}
| '-' methoddecl ';'
{
$2->instance = 1;
$$ = $2;
}
;
methoddecl
: '(' abstract_decl ')' unaryselector
{ $$ = new_method ($2->type, $4, 0); }
| unaryselector
{ $$ = new_method (&type_id, $1, 0); }
| '(' abstract_decl ')' keywordselector optional_param_list
{ $$ = new_method ($2->type, $4, $5); }
| keywordselector optional_param_list
{ $$ = new_method (&type_id, $1, $2); }
;
optional_param_list
: /* empty */ { $$ = 0; }
| ',' ELLIPSIS { $$ = new_param (0, 0, 0); }
| ',' param_list { $$ = $2; }
| ',' param_list ',' ELLIPSIS
{
$$ = new_param (0, 0, 0);
$$->next = $2;
}
;
unaryselector
: selector { $$ = new_param ($1->name, 0, 0); }
;
keywordselector
: keyworddecl
| keywordselector keyworddecl { $2->next = $1; $$ = $2; }
;
selector
: NAME { $$ = $1; }
| CLASS_NAME { $$ = $1; }
| TYPE { $$ = new_symbol (yytext); }
| TYPE_NAME { $$ = $1; }
| reserved_word
;
reserved_word
: LOCAL { $$ = new_symbol (yytext); }
| RETURN { $$ = new_symbol (yytext); }
| WHILE { $$ = new_symbol (yytext); }
| DO { $$ = new_symbol (yytext); }
| IF { $$ = new_symbol (yytext); }
| ELSE { $$ = new_symbol (yytext); }
| FOR { $$ = new_symbol (yytext); }
| BREAK { $$ = new_symbol (yytext); }
| CONTINUE { $$ = new_symbol (yytext); }
| SWITCH { $$ = new_symbol (yytext); }
| CASE { $$ = new_symbol (yytext); }
| DEFAULT { $$ = new_symbol (yytext); }
| NIL { $$ = new_symbol (yytext); }
| STRUCT { $$ = new_symbol (yytext); }
| ENUM { $$ = new_symbol (yytext); }
| TYPEDEF { $$ = new_symbol (yytext); }
;
keyworddecl
: selector ':' '(' abstract_decl ')' identifier
{ $$ = new_param ($1->name, $4->type, $6->name); }
| selector ':' identifier
{ $$ = new_param ($1->name, &type_id, $3->name); }
| ':' '(' abstract_decl ')' identifier
{ $$ = new_param ("", $3->type, $5->name); }
| ':' identifier
{ $$ = new_param ("", &type_id, $2->name); }
;
obj_expr
: obj_messageexpr
| SELECTOR '(' selectorarg ')' { $$ = selector_expr ($3); }
| PROTOCOL '(' identifier ')' { $$ = protocol_expr ($3->name); }
| ENCODE '(' abstract_decl ')' { $$ = encode_expr ($3->type); }
| obj_string /* FIXME string object? */
;
obj_messageexpr
: '[' receiver messageargs ']' { $$ = message_expr ($2, $3); }
;
receiver
: fexpr
| CLASS_NAME
{
$$ = new_symbol_expr ($1);
}
;
messageargs
: selector { $$ = new_keywordarg ($1->name, 0); }
| keywordarglist
;
keywordarglist
: keywordarg
| keywordarglist keywordarg
{
$2->next = $1;
$$ = $2;
}
;
keywordarg
: selector ':' arg_list { $$ = new_keywordarg ($1->name, $3); }
| ':' arg_list { $$ = new_keywordarg ("", $2); }
;
selectorarg
: selector { $$ = new_keywordarg ($1->name, 0); }
| keywordnamelist
;
keywordnamelist
: keywordname
| keywordnamelist keywordname
{
$2->next = $1;
$$ = $2;
}
;
keywordname
: selector ':' { $$ = new_keywordarg ($1->name, new_nil_expr ()); }
| ':' { $$ = new_keywordarg ("", new_nil_expr ()); }
;
obj_string
: '@' STRING
{
//FIXME string object
$$ = $2;
}
;
%%
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