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Parsing noref-pragma

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This commit is contained in:
Wolfgang (Blub) Bumiller 2012-12-03 20:37:02 +01:00
parent ea08d16c06
commit 88a4721de7
2 changed files with 78 additions and 0 deletions
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2
lexer.c
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@ -492,6 +492,7 @@ unroll:
vec_pop(command);
}
vec_free(command);
lex_ungetch(lex, ' ');
}
if (command) {
vec_pop(command);
@ -500,6 +501,7 @@ unroll:
vec_pop(command);
}
vec_free(command);
lex_ungetch(lex, ' ');
}
if (pragma) {
vec_pop(pragma);

76
parser.c
View file

@ -93,6 +93,9 @@ typedef struct {
* we shall trigger -Wternary-precedence.
*/
enum { POT_PAREN, POT_TERNARY1, POT_TERNARY2 } *pot;
/* pragma flags */
bool noref;
} parser_t;
static void parser_enterblock(parser_t *parser);
@ -2398,6 +2401,75 @@ static bool parse_goto(parser_t *parser, ast_expression **out)
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
{
parseerror(parser, "unrecognized hash-keyword: `%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)
{
int cvq;
@ -4266,6 +4338,10 @@ static bool parser_global_statement(parser_t *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)) {