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52 lines
1.1 KiB
C++
52 lines
1.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// UNSUPPORTED: c++03
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// <system_error>
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// template <> struct is_error_code_enum<> : public false_type {};
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#include <system_error>
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#include <string>
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#include "test_macros.h"
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template <bool Expected, class T>
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void
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test()
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{
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static_assert((std::is_error_code_enum<T>::value == Expected), "");
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#if TEST_STD_VER > 14
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static_assert((std::is_error_code_enum_v<T> == Expected), "");
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#endif
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}
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class A {
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A();
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operator std::error_code () const { return std::error_code(); }
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};
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// Specialize the template for my class
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namespace std
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{
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template <>
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struct is_error_code_enum<A> : public std::true_type {};
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}
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int main()
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{
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test<false, void>();
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test<false, int>();
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test<false, std::nullptr_t>();
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test<false, std::string>();
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test<true, A>();
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}
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