| 1 | // RUN: %clang_cc1 -verify -fsyntax-only -Wshadow -Wold-style-cast %s |
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| 2 | |
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| 3 | // Test that macro expansions from system headers don't trigger 'syntactic' |
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| 4 | // warnings that are not actionable. |
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| 5 | |
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| 6 | #ifdef IS_SYSHEADER |
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| 7 | #pragma clang system_header |
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| 8 | |
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| 9 | #define SANITY(a) (a / 0) |
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| 10 | |
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| 11 | #define SHADOW(a) __extension__({ int v = a; v; }) |
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| 12 | |
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| 13 | #define OLD_STYLE_CAST(a) ((int) (a)) |
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| 14 | |
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| 15 | #else |
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| 16 | |
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| 17 | #define IS_SYSHEADER |
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| 18 | #include __FILE__ |
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| 19 | |
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| 20 | void testSanity() { |
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| 21 | // Validate that the test is set up correctly |
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| 22 | int i = SANITY(0); // expected-warning {{division by zero is undefined}} |
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| 23 | } |
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| 24 | |
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| 25 | void PR16093() { |
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| 26 | // no -Wshadow in system macro expansion |
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| 27 | int i = SHADOW(SHADOW(1)); |
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| 28 | } |
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| 29 | |
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| 30 | void PR18147() { |
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| 31 | // no -Wold_style_cast in system macro expansion |
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| 32 | int i = OLD_STYLE_CAST(0); |
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| 33 | } |
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| 34 | |
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| 35 | #endif |
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| 36 | |
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