56 lines
2.4 KiB
C++
56 lines
2.4 KiB
C++
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// RUN: %clang_cc1 -triple x86_64-win32 -fms-compatibility -fms-extensions -fsyntax-only -verify -std=c++11 %s
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// RUN: %clang_cc1 -triple x86_64-unknown-linux -fms-compatibility -fms-extensions -fsyntax-only -verify -std=c++11 %s
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// RUN: %clang_cc1 -triple x86_64-win32-macho -fms-compatibility -fms-extensions -fsyntax-only -verify -std=c++11 %s
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// MSVC produces similar diagnostics.
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__declspec(selectany) void foo() { } // expected-error{{'selectany' can only be applied to data items with external linkage}}
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__declspec(selectany) int x1 = 1;
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const __declspec(selectany) int x2 = 2; // expected-error{{'selectany' can only be applied to data items with external linkage}}
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extern const __declspec(selectany) int x3 = 3;
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extern const int x4;
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const __declspec(selectany) int x4 = 4;
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// MSDN says this is incorrect, but MSVC doesn't diagnose it.
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extern __declspec(selectany) int x5;
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static __declspec(selectany) int x6 = 2; // expected-error{{'selectany' can only be applied to data items with external linkage}}
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// FIXME: MSVC accepts this and makes x7 externally visible and comdat, but keep
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// it as internal and not weak/linkonce.
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static int x7; // expected-note{{previous definition}}
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extern __declspec(selectany) int x7; // expected-warning{{attribute declaration must precede definition}}
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int asdf() { return x7; }
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class X {
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public:
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X(int i) { i++; };
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int i;
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};
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__declspec(selectany) X x(1);
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namespace { class Internal {}; }
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__declspec(selectany) auto x8 = Internal(); // expected-error {{'selectany' can only be applied to data items with external linkage}}
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// The D3D11 headers do something like this. MSVC doesn't error on this at
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// all, even without the __declspec(selectany), in violation of the standard.
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// We fall back to a warning for selectany to accept headers.
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struct SomeStruct {
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int foo;
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};
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extern const __declspec(selectany) SomeStruct some_struct; // expected-warning {{default initialization of an object of const type 'const SomeStruct' without a user-provided default constructor is a Microsoft extension}}
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// It should be possible to redeclare variables that were defined
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// __declspec(selectany) previously.
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extern const SomeStruct some_struct;
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// Without selectany, this should stay an error.
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const SomeStruct some_struct2; // expected-error {{default initialization of an object of const type 'const SomeStruct' without a user-provided default constructor}}
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