libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_copy_constructible.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // type_traits
  10
  11 // is_trivially_copy_constructible
  12
  13 #include <type_traits>
  14 #include "test_macros.h"
  15
  16 template <class T>
  17 void test_is_trivially_copy_constructible()
  18 {
  19     static_assert( std::is_trivially_copy_constructible<T>::value, "");
  20     static_assert( std::is_trivially_copy_constructible<const T>::value, "");
  21 #if TEST_STD_VER > 14
  22     static_assert( std::is_trivially_copy_constructible_v<T>, "");
  23     static_assert( std::is_trivially_copy_constructible_v<const T>, "");
  24 #endif
  25 }
  26
  27 template <class T>
  28 void test_has_not_trivial_copy_constructor()
  29 {
  30     static_assert(!std::is_trivially_copy_constructible<T>::value, "");
  31     static_assert(!std::is_trivially_copy_constructible<const T>::value, "");
  32 #if TEST_STD_VER > 14
  33     static_assert(!std::is_trivially_copy_constructible_v<T>, "");
  34     static_assert(!std::is_trivially_copy_constructible_v<const T>, "");
  35 #endif
  36 }
  37
  38 class Empty
  39 {
  40 };
  41
  42 class NotEmpty
  43 {
  44 public:
  45     virtual ~NotEmpty();
  46 };
  47
  48 union Union {};
  49
  50 struct bit_zero
  51 {
  52     int :  0;
  53 };
  54
  55 class Abstract
  56 {
  57 public:
  58     virtual ~Abstract() = 0;
  59 };
  60
  61 struct A
  62 {
  63     A(const A&);
  64 };
  65
  66 int main(int, char**)
  67 {
  68     test_has_not_trivial_copy_constructor<void>();
  69     test_has_not_trivial_copy_constructor<A>();
  70     test_has_not_trivial_copy_constructor<Abstract>();
  71     test_has_not_trivial_copy_constructor<NotEmpty>();
  72
  73     test_is_trivially_copy_constructible<int&>();
  74     test_is_trivially_copy_constructible<Union>();
  75     test_is_trivially_copy_constructible<Empty>();
  76     test_is_trivially_copy_constructible<int>();
  77     test_is_trivially_copy_constructible<double>();
  78     test_is_trivially_copy_constructible<int*>();
  79     test_is_trivially_copy_constructible<const int*>();
  80     test_is_trivially_copy_constructible<bit_zero>();
  81
  82   return 0;
  83 }