third_party_mesa3d/glcpp/tests/037-finalize-unexpanded-macro.c

#define expand(x) expand(x once)
#define foo(x) x
foo(expand(just))
Avoid re-expanding a macro name that has once been rejected from expansion. The specification of the preprocessor in C99 says that when we see a macro name that we are already expanding that we refuse to expand it now, (which we've done for a while), but also that we refuse to ever expand it later if seen in other contexts at which it would be legitimate to expand. We add a test case for that here, and fix it to work. The fix takes advantage of a new token_t value for tokens and argument words along with the recently added IDENTIFIER_FINALIZED token type which instructs the parser to not even look for another expansion. 2010-05-20 08:01:44 -07:00			`#define expand(x) expand(x once)`
			`#define foo(x) x`
			`foo(expand(just))`