libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivially_move_assignable.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_move_assignable
  12
  13 #include <type_traits>
  14 #include "test_macros.h"
  15
  16 template <class T>
  17 void test_has_trivial_assign()
  18 {
  19     static_assert( std::is_trivially_move_assignable<T>::value, "");
  20 #if TEST_STD_VER > 14
  21     static_assert( std::is_trivially_move_assignable_v<T>, "");
  22 #endif
  23 }
  24
  25 template <class T>
  26 void test_has_not_trivial_assign()
  27 {
  28     static_assert(!std::is_trivially_move_assignable<T>::value, "");
  29 #if TEST_STD_VER > 14
  30     static_assert(!std::is_trivially_move_assignable_v<T>, "");
  31 #endif
  32 }
  33
  34 class Empty
  35 {
  36 };
  37
  38 class NotEmpty
  39 {
  40     virtual ~NotEmpty();
  41 };
  42
  43 union Union {};
  44
  45 struct bit_zero
  46 {
  47     int :  0;
  48 };
  49
  50 class Abstract
  51 {
  52     virtual ~Abstract() = 0;
  53 };
  54
  55 struct A
  56 {
  57     A& operator=(const A&);
  58 };
  59
  60 int main(int, char**)
  61 {
  62     test_has_trivial_assign<int&>();
  63     test_has_trivial_assign<Union>();
  64     test_has_trivial_assign<Empty>();
  65     test_has_trivial_assign<int>();
  66     test_has_trivial_assign<double>();
  67     test_has_trivial_assign<int*>();
  68     test_has_trivial_assign<const int*>();
  69     test_has_trivial_assign<bit_zero>();
  70
  71     test_has_not_trivial_assign<void>();
  72     test_has_not_trivial_assign<A>();
  73     test_has_not_trivial_assign<NotEmpty>();
  74     test_has_not_trivial_assign<Abstract>();
  75     test_has_not_trivial_assign<const Empty>();
  76
  77
  78   return 0;
  79 }