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-Weffectless-statement, on by default, creates 'statement has no effect' warning

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Wolfgang (Blub) Bumiller 2012-08-23 20:52:09 +02:00
parent dff6328c9e
commit 45388202c4
3 changed files with 9 additions and 0 deletions
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1
main.c
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@ -402,6 +402,7 @@ int main(int argc, char **argv) {
options_set(opts_warn, WARN_VARIADIC_FUNCTION, true);
options_set(opts_warn, WARN_FRAME_MACROS, true);
options_set(opts_warn, WARN_UNUSED_VARIABLE, true);
options_set(opts_warn, WARN_EFFECTLESS_STATEMENT, true);
if (!options_parse(argc, argv)) {
return usage();

7
parser.c
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@ -1768,6 +1768,13 @@ static bool parser_parse_statement(parser_t *parser, ast_block *block, ast_expre
if (!exp)
return false;
*out = exp;
if (!ast_istype(exp, ast_store) &&
!ast_istype(exp, ast_call) &&
!ast_istype(exp, ast_binstore))
{
if (parsewarning(parser, WARN_EFFECTLESS_STATEMENT, "statement has no effect"))
return false;
}
return true;
}
}

1
warns.def
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@ -16,3 +16,4 @@ GMQCC_DEFINE_FLAG(VOID_VARIABLES)
GMQCC_DEFINE_FLAG(IMPLICIT_FUNCTION_POINTER)
GMQCC_DEFINE_FLAG(VARIADIC_FUNCTION)
GMQCC_DEFINE_FLAG(FRAME_MACROS)
GMQCC_DEFINE_FLAG(EFFECTLESS_STATEMENT)