757a69b760
This commit marks the transparent_union attributes as C only because clang doesn't support them in C++ mode. Prior to this commit, clang still tried to verify these attributes in C++, leading to crashes when analyzing templated transparent_union unions that have dependent field types. This commit ensures that such crashes won't happen again. As a result of this commit clang now displays a warning every time it encounters a transparent_union attribute in C++ mode. Differential Revision: https://reviews.llvm.org/D25308 llvm-svn: 283995
46 lines
1.8 KiB
C++
46 lines
1.8 KiB
C++
// RUN: %clang_cc1 -std=gnu++11 -fsyntax-only -fms-compatibility -verify %s
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void f() {
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// GNU-style attributes are prohibited in this position.
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auto P = new int * __attribute__((vector_size(8))); // expected-error {{an attribute list cannot appear here}} \
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// expected-error {{invalid vector element type 'int *'}}
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// Ensure that MS type attribute keywords are still supported in this
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// position.
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auto P2 = new int * __sptr; // Ok
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}
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void g(int a[static [[]] 5]); // expected-error {{static array size is a C99 feature, not permitted in C++}}
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namespace {
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class B {
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public:
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virtual void test() {}
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virtual void test2() {}
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virtual void test3() {}
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};
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class D : public B {
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public:
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void test() __attribute__((deprecated)) final {} // expected-warning {{GCC does not allow an attribute in this position on a function declaration}}
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void test2() [[]] override {} // Ok
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void test3() __attribute__((cf_unknown_transfer)) override {} // Ok, not known to GCC.
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};
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}
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template<typename T>
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union Tu { T b; } __attribute__((transparent_union)); // expected-warning {{'transparent_union' attribute ignored}}
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template<typename T>
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union Tu2 { int x; T b; } __attribute__((transparent_union)); // expected-warning {{'transparent_union' attribute ignored}}
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union Tu3 { int x; } __attribute((transparent_union)); // expected-warning {{'transparent_union' attribute ignored}}
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void tuTest1(Tu<int> u); // expected-note {{candidate function not viable: no known conversion from 'int' to 'Tu<int>' for 1st argument}}
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void tuTest2(Tu3 u); // expected-note {{candidate function not viable: no known conversion from 'int' to 'Tu3' for 1st argument}}
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void tu() {
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int x = 2;
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tuTest1(x); // expected-error {{no matching function for call to 'tuTest1'}}
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tuTest2(x); // expected-error {{no matching function for call to 'tuTest2'}}
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}
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