Handling of multiple variables with comma

This commit is contained in:
Wolfgang Bumiller 2012-07-20 12:53:42 +02:00
parent 3decabaa8f
commit 2763578f8b

287
parser.c
View file

@ -91,20 +91,18 @@ typedef struct {
} paramlist_t;
MEM_VEC_FUNCTIONS(paramlist_t, ast_value*, p)
static ast_value *parser_parse_type(parser_t *parser, bool *isfunc)
static ast_value *parser_parse_type(parser_t *parser, int basetype, bool *isfunc)
{
paramlist_t params;
ast_value *var;
lex_ctx ctx = parser_ctx(parser);
int vtype = parser_token(parser)->constval.t;
int vtype = basetype;
int temptype;
MEM_VECTOR_INIT(&params, p);
*isfunc = false;
if (!parser_next(parser))
return NULL;
if (parser->tok == '(') {
*isfunc = true;
while (true) {
@ -119,7 +117,12 @@ static ast_value *parser_parse_type(parser_t *parser, bool *isfunc)
if (parser->tok == ')')
break;
param = parser_parse_type(parser, &dummy);
temptype = parser_token(parser)->constval.t;
if (!parser_next(parser)) {
MEM_VECTOR_CLEAR(&params, p);
return NULL;
}
param = parser_parse_type(parser, temptype, &dummy);
(void)dummy;
if (!param) {
@ -216,151 +219,177 @@ cleanup:
static bool parser_variable(parser_t *parser, bool global)
{
bool isfunc = false;
bool isfunc = false;
ast_function *func = NULL;
lex_ctx ctx = parser_ctx(parser);
ast_value *var = parser_parse_type(parser, &isfunc);
if (!var)
return false;
lex_ctx ctx;
ast_value *var;
if (parser->tok != TOKEN_IDENT) {
parseerror(parser, "expected variable name\n");
return false;
}
int basetype = parser_token(parser)->constval.t;
if (global && parser_find_global(parser, parser_tokval(parser))) {
ast_value_delete(var);
parseerror(parser, "global already exists: %s\n", parser_tokval(parser));
return false;
}
if (!global && parser_find_local(parser, parser_tokval(parser), parser->blocklocal)) {
ast_value_delete(var);
parseerror(parser, "local variable already exists: %s\n", parser_tokval(parser));
return false;
}
if (!ast_value_set_name(var, parser_tokval(parser))) {
parseerror(parser, "failed to set variable name\n");
ast_value_delete(var);
return false;
}
if (isfunc) {
/* a function was defined */
ast_value *fval;
/* turn var into a value of TYPE_FUNCTION, with the old var
* as return type
*/
fval = ast_value_new(ctx, var->name, TYPE_FUNCTION);
func = ast_function_new(ctx, var->name, fval);
if (!fval || !func) {
ast_value_delete(var);
if (fval) ast_value_delete(fval);
if (func) ast_function_delete(func);
return false;
}
fval->expression.next = (ast_expression*)var;
MEM_VECTOR_MOVE(var, params, fval, params);
if (!parser_t_functions_add(parser, func)) {
ast_value_delete(var);
if (fval) ast_value_delete(fval);
if (func) ast_function_delete(func);
return false;
}
var = fval;
}
if ( ( global && !parser_t_globals_add(parser, var)) ||
(!global && !parser_t_locals_add(parser, var)) )
while (true)
{
ast_value_delete(var);
return false;
}
if (!parser_next(parser)) {
ast_value_delete(var);
return false;
}
if (parser->tok == ';') {
if (!parser_next(parser))
return parser->tok == TOKEN_EOF;
return true;
}
if (parser->tok != '=') {
parseerror(parser, "expected '=' or ';'");
return false;
}
if (!parser_next(parser))
return false;
if (parser->tok == '#') {
if (!global) {
parseerror(parser, "cannot declare builtins within functions");
if (!parser_next(parser)) { /* skip basetype or comma */
parseerror(parser, "expected variable declaration");
return false;
}
if (!isfunc || !func) {
parseerror(parser, "unexpected builtin number, '%s' is not a function", var->name);
isfunc = false;
func = NULL;
ctx = parser_ctx(parser);
var = parser_parse_type(parser, basetype, &isfunc);
if (!var)
return false;
if (parser->tok != TOKEN_IDENT) {
parseerror(parser, "expected variable name\n");
return false;
}
if (global && parser_find_global(parser, parser_tokval(parser))) {
ast_value_delete(var);
parseerror(parser, "global already exists: %s\n", parser_tokval(parser));
return false;
}
if (!global && parser_find_local(parser, parser_tokval(parser), parser->blocklocal)) {
ast_value_delete(var);
parseerror(parser, "local variable already exists: %s\n", parser_tokval(parser));
return false;
}
if (!ast_value_set_name(var, parser_tokval(parser))) {
parseerror(parser, "failed to set variable name\n");
ast_value_delete(var);
return false;
}
if (isfunc) {
/* a function was defined */
ast_value *fval;
/* turn var into a value of TYPE_FUNCTION, with the old var
* as return type
*/
fval = ast_value_new(ctx, var->name, TYPE_FUNCTION);
func = ast_function_new(ctx, var->name, fval);
if (!fval || !func) {
ast_value_delete(var);
if (fval) ast_value_delete(fval);
if (func) ast_function_delete(func);
return false;
}
fval->expression.next = (ast_expression*)var;
MEM_VECTOR_MOVE(var, params, fval, params);
if (!parser_t_functions_add(parser, func)) {
ast_value_delete(var);
if (fval) ast_value_delete(fval);
if (func) ast_function_delete(func);
return false;
}
var = fval;
}
if ( ( global && !parser_t_globals_add(parser, var)) ||
(!global && !parser_t_locals_add(parser, var)) )
{
ast_value_delete(var);
return false;
}
if (!parser_next(parser)) {
parseerror(parser, "expected builtin number");
return false;
}
if (parser->tok != TOKEN_INTCONST) {
parseerror(parser, "builtin number must be an integer constant");
return false;
}
if (parser_token(parser)->constval.i <= 0) {
parseerror(parser, "builtin number must be positive integer greater than zero");
ast_value_delete(var);
return false;
}
func->builtin = -parser_token(parser)->constval.i;
} else if (parser->tok == '{') {
/* function body */
ast_block *block;
ast_function *old = parser->function;
if (parser->tok == ';') {
if (!parser_next(parser))
return parser->tok == TOKEN_EOF;
return true;
}
if (!global) {
parseerror(parser, "cannot declare functions within functions");
if (parser->tok == ',') {
/* another var */
continue;
}
if (parser->tok != '=') {
parseerror(parser, "expected '=' or ';'");
return false;
}
parser->function = func;
block = parser_parse_block(parser);
parser->function = old;
if (!block)
if (!parser_next(parser))
return false;
if (!ast_function_blocks_add(func, block)) {
ast_block_delete(block);
if (parser->tok == '#') {
if (!global) {
parseerror(parser, "cannot declare builtins within functions");
return false;
}
if (!isfunc || !func) {
parseerror(parser, "unexpected builtin number, '%s' is not a function", var->name);
return false;
}
if (!parser_next(parser)) {
parseerror(parser, "expected builtin number");
return false;
}
if (parser->tok != TOKEN_INTCONST) {
parseerror(parser, "builtin number must be an integer constant");
return false;
}
if (parser_token(parser)->constval.i <= 0) {
parseerror(parser, "builtin number must be positive integer greater than zero");
return false;
}
func->builtin = -parser_token(parser)->constval.i;
} else if (parser->tok == '{') {
/* function body */
ast_block *block;
ast_function *old = parser->function;
if (!global) {
parseerror(parser, "cannot declare functions within functions");
return false;
}
parser->function = func;
block = parser_parse_block(parser);
parser->function = old;
if (!block)
return false;
if (!ast_function_blocks_add(func, block)) {
ast_block_delete(block);
return false;
}
return true;
} else {
parseerror(parser, "TODO, const assignment");
}
if (!parser_next(parser))
return false;
if (parser->tok == ',') {
/* another */
continue;
}
if (parser->tok != ';') {
parseerror(parser, "expected semicolon");
return false;
}
(void)parser_next(parser);
return true;
} else {
parseerror(parser, "TODO, const assignment");
}
if (!parser_next(parser))
return false;
if (parser->tok != ';') {
parseerror(parser, "expected semicolon");
return false;
}
(void)parser_next(parser);
return true;
}
static bool parser_do(parser_t *parser)