diff options
Diffstat (limited to 'clang/test/Preprocessor/macro_paste_bad.c')
| -rw-r--r-- | clang/test/Preprocessor/macro_paste_bad.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/clang/test/Preprocessor/macro_paste_bad.c b/clang/test/Preprocessor/macro_paste_bad.c new file mode 100644 index 0000000..0a028a4 --- /dev/null +++ b/clang/test/Preprocessor/macro_paste_bad.c @@ -0,0 +1,34 @@ +// RUN: %clang_cc1 -Eonly -verify -pedantic %s +// pasting ""x"" and ""+"" does not give a valid preprocessing token +#define XYZ x ## + +XYZ // expected-error {{pasting formed 'x+', an invalid preprocessing token}} +#define XXYZ . ## test +XXYZ // expected-error {{pasting formed '.test', an invalid preprocessing token}} + +// GCC PR 20077 + +#define a a ## ## // expected-error {{'##' cannot appear at end of macro expansion}} +#define b() b ## ## // expected-error {{'##' cannot appear at end of macro expansion}} +#define c c ## // expected-error {{'##' cannot appear at end of macro expansion}} +#define d() d ## // expected-error {{'##' cannot appear at end of macro expansion}} + + +#define e ## ## e // expected-error {{'##' cannot appear at start of macro expansion}} +#define f() ## ## f // expected-error {{'##' cannot appear at start of macro expansion}} +#define g ## g // expected-error {{'##' cannot appear at start of macro expansion}} +#define h() ## h // expected-error {{'##' cannot appear at start of macro expansion}} +#define i ## // expected-error {{'##' cannot appear at start of macro expansion}} +#define j() ## // expected-error {{'##' cannot appear at start of macro expansion}} + +// Invalid token pasting. +// PR3918 + +// When pasting creates poisoned identifiers, we error. +#pragma GCC poison BLARG +BLARG // expected-error {{attempt to use a poisoned identifier}} +#define XX BL ## ARG +XX // expected-error {{attempt to use a poisoned identifier}} + +#define VA __VA_ ## ARGS__ +int VA; // expected-warning {{__VA_ARGS__ can only appear in the expansion of a C99 variadic macro}} + |