libcxx/test/std/containers/sequences/array/compare.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 // <array>
  10
  11 // bool operator==(array<T, N> const&, array<T, N> const&);   // constexpr in C++20
  12 // bool operator!=(array<T, N> const&, array<T, N> const&);   // constexpr in C++20
  13 // bool operator<(array<T, N> const&, array<T, N> const&);    // constexpr in C++20
  14 // bool operator<=(array<T, N> const&, array<T, N> const&);   // constexpr in C++20
  15 // bool operator>(array<T, N> const&, array<T, N> const&);    // constexpr in C++20
  16 // bool operator>=(array<T, N> const&, array<T, N> const&);   // constexpr in C++20
  17
  18
  19 #include <array>
  20 #include <cassert>
  21
  22 #include "test_macros.h"
  23 #include "test_comparisons.h"
  24
  25 // std::array is explicitly allowed to be initialized with A a = { init-list };.
  26 // Disable the missing braces warning for this reason.
  27 #include "disable_missing_braces_warning.h"
  28
  29 TEST_CONSTEXPR_CXX20 bool tests()
  30 {
  31     {
  32         typedef std::array<int, 3> C;
  33         C c1 = {1, 2, 3};
  34         C c2 = {1, 2, 3};
  35         C c3 = {3, 2, 1};
  36         C c4 = {1, 2, 1};
  37         assert(testComparisons6(c1, c2, true, false));
  38         assert(testComparisons6(c1, c3, false, true));
  39         assert(testComparisons6(c1, c4, false, false));
  40     }
  41     {
  42         typedef std::array<int, 0> C;
  43         C c1 = {};
  44         C c2 = {};
  45         assert(testComparisons6(c1, c2, true, false));
  46     }
  47
  48     return true;
  49 }
  50
  51 int main(int, char**)
  52 {
  53     tests();
  54 #if TEST_STD_VER >= 20
  55     static_assert(tests(), "");
  56 #endif
  57     return 0;
  58 }