94611a888b
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@251766 91177308-0d34-0410-b5e6-96231b3b80d8
98 lines
2.5 KiB
C++
98 lines
2.5 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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// type_traits
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// is_function
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#include <type_traits>
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#include "test_macros.h"
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template <class T>
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void test_is_function()
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{
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static_assert( std::is_function<T>::value, "");
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static_assert( std::is_function<const T>::value, "");
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static_assert( std::is_function<volatile T>::value, "");
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static_assert( std::is_function<const volatile T>::value, "");
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#if TEST_STD_VER > 14
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static_assert( std::is_function_v<T>, "");
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static_assert( std::is_function_v<const T>, "");
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static_assert( std::is_function_v<volatile T>, "");
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static_assert( std::is_function_v<const volatile T>, "");
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#endif
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}
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template <class T>
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void test_is_not_function()
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{
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static_assert(!std::is_function<T>::value, "");
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static_assert(!std::is_function<const T>::value, "");
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static_assert(!std::is_function<volatile T>::value, "");
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static_assert(!std::is_function<const volatile T>::value, "");
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#if TEST_STD_VER > 14
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static_assert(!std::is_function_v<T>, "");
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static_assert(!std::is_function_v<const T>, "");
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static_assert(!std::is_function_v<volatile T>, "");
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static_assert(!std::is_function_v<const volatile T>, "");
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#endif
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}
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class Empty
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{
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};
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class NotEmpty
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{
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virtual ~NotEmpty();
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};
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union Union {};
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struct bit_zero
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{
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int : 0;
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};
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class Abstract
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{
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virtual ~Abstract() = 0;
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};
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enum Enum {zero, one};
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typedef void (*FunctionPtr)();
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int main()
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{
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test_is_function<void(void)>();
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test_is_function<int(int)>();
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test_is_function<int(int, double)>();
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test_is_function<int(Abstract *)>();
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test_is_function<void(...)>();
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test_is_not_function<std::nullptr_t>();
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test_is_not_function<void>();
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test_is_not_function<int>();
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test_is_not_function<int&>();
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test_is_not_function<int&&>();
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test_is_not_function<int*>();
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test_is_not_function<double>();
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test_is_not_function<char[3]>();
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test_is_not_function<char[]>();
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test_is_not_function<Union>();
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test_is_not_function<Enum>();
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test_is_not_function<FunctionPtr>(); // function pointer is not a function
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test_is_not_function<Empty>();
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test_is_not_function<bit_zero>();
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test_is_not_function<NotEmpty>();
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test_is_not_function<Abstract>();
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test_is_not_function<Abstract*>();
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}
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