libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_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_copy_constructible
  12
  13 #include <type_traits>
  14 #include "test_macros.h"
  15
  16 template <class T>
  17 void test_is_copy_constructible()
  18 {
  19     static_assert( std::is_copy_constructible<T>::value, "");
  20 #if TEST_STD_VER > 14
  21     static_assert( std::is_copy_constructible_v<T>, "");
  22 #endif
  23 }
  24
  25 template <class T>
  26 void test_is_not_copy_constructible()
  27 {
  28     static_assert(!std::is_copy_constructible<T>::value, "");
  29 #if TEST_STD_VER > 14
  30     static_assert(!std::is_copy_constructible_v<T>, "");
  31 #endif
  32 }
  33
  34 class Empty
  35 {
  36 };
  37
  38 class NotEmpty
  39 {
  40 public:
  41     virtual ~NotEmpty();
  42 };
  43
  44 union Union {};
  45
  46 struct bit_zero
  47 {
  48     int :  0;
  49 };
  50
  51 class Abstract
  52 {
  53 public:
  54     virtual ~Abstract() = 0;
  55 };
  56
  57 struct A
  58 {
  59     A(const A&);
  60 };
  61
  62 class B
  63 {
  64     B(const B&);
  65 };
  66
  67 struct C
  68 {
  69     C(C&);  // not const
  70     void operator=(C&);  // not const
  71 };
  72
  73 int main(int, char**)
  74 {
  75     test_is_copy_constructible<A>();
  76     test_is_copy_constructible<int&>();
  77     test_is_copy_constructible<Union>();
  78     test_is_copy_constructible<Empty>();
  79     test_is_copy_constructible<int>();
  80     test_is_copy_constructible<double>();
  81     test_is_copy_constructible<int*>();
  82     test_is_copy_constructible<const int*>();
  83     test_is_copy_constructible<NotEmpty>();
  84     test_is_copy_constructible<bit_zero>();
  85
  86     test_is_not_copy_constructible<char[3]>();
  87     test_is_not_copy_constructible<char[]>();
  88     test_is_not_copy_constructible<void>();
  89     test_is_not_copy_constructible<Abstract>();
  90     test_is_not_copy_constructible<C>();
  91 #if TEST_STD_VER >= 11
  92     test_is_not_copy_constructible<B>();
  93 #endif
  94
  95   return 0;
  96 }