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49 lines
1.5 KiB
49 lines
1.5 KiB
4 months ago
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// RUN: %clang_cc1 -fsyntax-only -verify %s
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// This is a test for an egregious hack in Clang that works around
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// issues with GCC's evolution. libstdc++ 4.2.x uses __is_pod as an
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// identifier (to declare a struct template like the one below), while
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// GCC 4.3 and newer make __is_pod a keyword. Clang treats __is_pod as
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// a keyword *unless* it is introduced following the struct keyword.
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template<typename T>
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struct __is_pod { // expected-warning {{keyword '__is_pod' will be made available as an identifier}}
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__is_pod() {}
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};
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__is_pod<int> ipi;
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// Ditto for __is_same.
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template<typename T>
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struct __is_same { // expected-warning {{keyword '__is_same' will be made available as an identifier}}
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};
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__is_same<int> isi;
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// Another, similar egregious hack for __is_signed, which is a type
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// trait in Embarcadero's compiler but is used as an identifier in
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// libstdc++.
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struct test_is_signed {
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static const bool __is_signed = true; // expected-warning {{keyword '__is_signed' will be made available as an identifier}}
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};
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bool check_signed = test_is_signed::__is_signed;
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template<bool B> struct must_be_true {};
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template<> struct must_be_true<false>;
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void foo() {
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bool b = __is_pod(int);
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must_be_true<__is_pod(int)> mbt;
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}
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// expected-warning@+1 {{declaration does not declare anything}}
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struct // expected-error {{declaration of anonymous struct must be a definition}}
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#pragma pack(pop)
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S {
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};
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#if !__has_feature(is_pod)
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# error __is_pod should still be available.
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#endif
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