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15ab37321c
Thanks to Jonathan Sauer for providing initial test cases. Fixes PR16093 and PR18147. llvm-svn: 197150
36 lines
744 B
C++
36 lines
744 B
C++
// RUN: %clang_cc1 -verify -fsyntax-only -Wshadow -Wold-style-cast %s
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// Test that macro expansions from system headers don't trigger 'syntactic'
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// warnings that are not actionable.
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#ifdef IS_SYSHEADER
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#pragma clang system_header
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#define SANITY(a) (a / 0)
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#define SHADOW(a) __extension__({ int v = a; v; })
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#define OLD_STYLE_CAST(a) ((int) (a))
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#else
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#define IS_SYSHEADER
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#include __FILE__
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void testSanity() {
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// Validate that the test is set up correctly
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int i = SANITY(0); // expected-warning {{division by zero is undefined}}
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}
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void PR16093() {
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// no -Wshadow in system macro expansion
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int i = SHADOW(SHADOW(1));
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}
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void PR18147() {
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// no -Wold_style_cast in system macro expansion
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int i = OLD_STYLE_CAST(0);
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}
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#endif
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