libcxx/test/std/containers/views/mdspan/default_accessor/ctor.default.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 // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
  10
  11 // <mdspan>
  12
  13 // Test default construction:
  14 //
  15 // constexpr default_accessor() noexcept = default;
  16
  17 #include <mdspan>
  18 #include <cassert>
  19 #include <cstdint>
  20 #include <type_traits>
  21
  22 #include "test_macros.h"
  23
  24 #include "../MinimalElementType.h"
  25
  26 template <class T>
  27 constexpr void test_construction() {
  28   ASSERT_NOEXCEPT(std::default_accessor<T>{});
  29   [[maybe_unused]] std::default_accessor<T> acc;
  30   static_assert(std::is_trivially_default_constructible_v<std::default_accessor<T>>);
  31 }
  32
  33 constexpr bool test() {
  34   test_construction<int>();
  35   test_construction<const int>();
  36   test_construction<MinimalElementType>();
  37   test_construction<const MinimalElementType>();
  38   return true;
  39 }
  40
  41 int main(int, char**) {
  42   test();
  43   static_assert(test());
  44   return 0;
  45 }