933afa9761
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@185597 91177308-0d34-0410-b5e6-96231b3b80d8
88 lines
2.1 KiB
C++
88 lines
2.1 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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// type_traits
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// is_default_constructible
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#include <type_traits>
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template <class T>
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void test_is_default_constructible()
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{
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static_assert( std::is_default_constructible<T>::value, "");
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static_assert( std::is_default_constructible<const T>::value, "");
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static_assert( std::is_default_constructible<volatile T>::value, "");
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static_assert( std::is_default_constructible<const volatile T>::value, "");
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}
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template <class T>
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void test_is_not_default_constructible()
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{
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static_assert(!std::is_default_constructible<T>::value, "");
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static_assert(!std::is_default_constructible<const T>::value, "");
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static_assert(!std::is_default_constructible<volatile T>::value, "");
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static_assert(!std::is_default_constructible<const volatile T>::value, "");
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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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public:
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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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public:
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virtual ~Abstract() = 0;
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};
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struct A
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{
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A();
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};
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class B
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{
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B();
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};
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int main()
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{
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test_is_default_constructible<A>();
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test_is_default_constructible<Union>();
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test_is_default_constructible<Empty>();
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test_is_default_constructible<int>();
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test_is_default_constructible<double>();
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test_is_default_constructible<int*>();
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test_is_default_constructible<const int*>();
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test_is_default_constructible<char[3]>();
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test_is_default_constructible<NotEmpty>();
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test_is_default_constructible<bit_zero>();
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test_is_not_default_constructible<void>();
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test_is_not_default_constructible<int&>();
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test_is_not_default_constructible<char[]>();
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test_is_not_default_constructible<Abstract>();
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#if __has_feature(cxx_access_control_sfinae)
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test_is_not_default_constructible<B>();
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#endif
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}
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