33 lines
998 B
C++
33 lines
998 B
C++
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// RUN: %clang_cc1 -fsyntax-only %s -std=c++11 -verify
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// This is a test for a hack in Clang that works around an issue with libc++'s
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// <valarray> implementation. The <valarray> header contains explicit
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// instantiations of functions that it declared with the internal_linkage
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// attribute, which are ill-formed by [temp.explicit]p13 (and meaningless).
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#ifdef BE_THE_HEADER
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#pragma GCC system_header
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namespace std {
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using size_t = __SIZE_TYPE__;
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template<typename T> struct valarray {
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__attribute__((internal_linkage)) valarray(size_t) {}
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__attribute__((internal_linkage)) ~valarray() {}
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};
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extern template valarray<size_t>::valarray(size_t);
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extern template valarray<size_t>::~valarray();
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}
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#else
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#define BE_THE_HEADER
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#include "libcxx_valarray_hack.cpp"
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template<typename T> struct foo {
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__attribute__((internal_linkage)) void x() {};
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};
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extern template void foo<int>::x(); // expected-error {{explicit instantiation declaration of 'x' with internal linkage}}
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#endif
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