libcxx/test/std/containers/sequences/vector.bool/move_assign_noexcept.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 // <vector>
  10
  11 // vector& operator=(vector&& c)
  12 //     noexcept(
  13 //          allocator_type::propagate_on_container_move_assignment::value &&
  14 //          is_nothrow_move_assignable<allocator_type>::value);
  15
  16 // This tests a conforming extension
  17
  18 // UNSUPPORTED: c++03
  19
  20 #include <vector>
  21 #include <cassert>
  22
  23 #include "test_macros.h"
  24 #include "test_allocator.h"
  25
  26 template <class T>
  27 struct some_alloc
  28 {
  29     typedef T value_type;
  30     some_alloc(const some_alloc&);
  31 };
  32
  33 template <class T>
  34 struct some_alloc2
  35 {
  36     typedef T value_type;
  37
  38     some_alloc2() {}
  39     some_alloc2(const some_alloc2&);
  40     void deallocate(void*, unsigned) {}
  41
  42     typedef std::false_type propagate_on_container_move_assignment;
  43     typedef std::true_type is_always_equal;
  44 };
  45
  46 template <class T>
  47 struct some_alloc3
  48 {
  49     typedef T value_type;
  50
  51     some_alloc3() {}
  52     some_alloc3(const some_alloc3&);
  53     void deallocate(void*, unsigned) {}
  54
  55     typedef std::false_type propagate_on_container_move_assignment;
  56     typedef std::false_type is_always_equal;
  57 };
  58
  59 int main(int, char**)
  60 {
  61 #if defined(_LIBCPP_VERSION)
  62     {
  63         typedef std::vector<bool> C;
  64         static_assert(std::is_nothrow_move_assignable<C>::value, "");
  65     }
  66 #endif // _LIBCPP_VERSION
  67     {
  68         typedef std::vector<bool, test_allocator<bool>> C;
  69         static_assert(!std::is_nothrow_move_assignable<C>::value, "");
  70     }
  71 #if defined(_LIBCPP_VERSION)
  72     {
  73         typedef std::vector<bool, other_allocator<bool>> C;
  74         static_assert(std::is_nothrow_move_assignable<C>::value, "");
  75     }
  76 #endif // _LIBCPP_VERSION
  77     {
  78 #if TEST_STD_VER > 14
  79 #if defined(_LIBCPP_VERSION)
  80         typedef std::vector<bool, some_alloc<bool>> C;
  81         static_assert( std::is_nothrow_move_assignable<C>::value, "");
  82 #endif // _LIBCPP_VERSION
  83 #else
  84         typedef std::vector<bool, some_alloc<bool>> C;
  85         static_assert(!std::is_nothrow_move_assignable<C>::value, "");
  86 #endif
  87     }
  88 #if TEST_STD_VER > 14
  89 #if defined(_LIBCPP_VERSION)
  90     {  // POCMA false, is_always_equal true
  91         typedef std::vector<bool, some_alloc2<bool>> C;
  92         static_assert( std::is_nothrow_move_assignable<C>::value, "");
  93     }
  94 #endif // _LIBCPP_VERSION
  95     {  // POCMA false, is_always_equal false
  96         typedef std::vector<bool, some_alloc3<bool>> C;
  97         static_assert(!std::is_nothrow_move_assignable<C>::value, "");
  98     }
  99 #endif
 100
 101   return 0;
 102 }