| 1 | // RUN: %clang_cc1 -Eonly -verify -pedantic %s |
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| 2 | // pasting ""x"" and ""+"" does not give a valid preprocessing token |
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| 3 | #define XYZ x ## + |
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| 4 | XYZ // expected-error {{pasting formed 'x+', an invalid preprocessing token}} |
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| 5 | #define XXYZ . ## test |
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| 6 | XXYZ // expected-error {{pasting formed '.test', an invalid preprocessing token}} |
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| 7 | |
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| 8 | // GCC PR 20077 |
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| 9 | |
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| 10 | #define a a ## ## // expected-error {{'##' cannot appear at end of macro expansion}} |
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| 11 | #define b() b ## ## // expected-error {{'##' cannot appear at end of macro expansion}} |
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| 12 | #define c c ## // expected-error {{'##' cannot appear at end of macro expansion}} |
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| 13 | #define d() d ## // expected-error {{'##' cannot appear at end of macro expansion}} |
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| 14 | |
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| 15 | |
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| 16 | #define e ## ## e // expected-error {{'##' cannot appear at start of macro expansion}} |
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| 17 | #define f() ## ## f // expected-error {{'##' cannot appear at start of macro expansion}} |
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| 18 | #define g ## g // expected-error {{'##' cannot appear at start of macro expansion}} |
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| 19 | #define h() ## h // expected-error {{'##' cannot appear at start of macro expansion}} |
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| 20 | #define i ## // expected-error {{'##' cannot appear at start of macro expansion}} |
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| 21 | #define j() ## // expected-error {{'##' cannot appear at start of macro expansion}} |
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| 22 | |
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| 23 | // Invalid token pasting. |
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| 24 | // PR3918 |
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| 25 | |
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| 26 | // When pasting creates poisoned identifiers, we error. |
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| 27 | #pragma GCC poison BLARG |
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| 28 | BLARG // expected-error {{attempt to use a poisoned identifier}} |
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| 29 | #define XX BL ## ARG |
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| 30 | XX // expected-error {{attempt to use a poisoned identifier}} |
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| 31 | |
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| 32 | #define VA __VA_ ## ARGS__ |
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| 33 | int VA; // expected-warning {{__VA_ARGS__ can only appear in the expansion of a C99 variadic macro}} |
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| 34 | |
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| 35 | #define LOG_ON_ERROR(x) x ## #y; // expected-error {{'#' is not followed by a macro parameter}} |
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| 36 | LOG_ON_ERROR(0); |
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| 37 | |
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| 38 | #define PR21379A(x) printf ##x // expected-note {{macro 'PR21379A' defined here}} |
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| 39 | PR21379A(0 {, }) // expected-error {{too many arguments provided to function-like macro invocation}} |
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| 40 | // expected-note@-1 {{parentheses are required around macro argument containing braced initializer list}} |
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| 41 | |
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| 42 | #define PR21379B(x) printf #x // expected-note {{macro 'PR21379B' defined here}} |
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| 43 | PR21379B(0 {, }) // expected-error {{too many arguments provided to function-like macro invocation}} |
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| 44 | // expected-note@-1 {{parentheses are required around macro argument containing braced initializer list}} |
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| 45 | |
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