test/std/containers/sequences/array/compare.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <array>

//  These are all constexpr in C++20
// bool operator==(array<T, N> const&, array<T, N> const&);
// bool operator!=(array<T, N> const&, array<T, N> const&);
// bool operator<(array<T, N> const&, array<T, N> const&);
// bool operator<=(array<T, N> const&, array<T, N> const&);
// bool operator>(array<T, N> const&, array<T, N> const&);
// bool operator>=(array<T, N> const&, array<T, N> const&);


#include <array>
#include <vector>
#include <cassert>

#include "test_macros.h"
#include "test_comparisons.h"

// std::array is explicitly allowed to be initialized with A a = { init-list };.
// Disable the missing braces warning for this reason.
#include "disable_missing_braces_warning.h"

int main()
{
  {
    typedef int T;
    typedef std::array<T, 3> C;
    C c1 = {1, 2, 3};
    C c2 = {1, 2, 3};
    C c3 = {3, 2, 1};
    C c4 = {1, 2, 1};
    assert(testComparisons6(c1, c2, true, false));
    assert(testComparisons6(c1, c3, false, true));
    assert(testComparisons6(c1, c4, false, false));
  }
  {
    typedef int T;
    typedef std::array<T, 0> C;
    C c1 = {};
    C c2 = {};
    assert(testComparisons6(c1, c2, true, false));
  }

#if TEST_STD_VER > 17
  {
  constexpr std::array<int, 3> a1 = {1, 2, 3};
  constexpr std::array<int, 3> a2 = {2, 3, 4};
  static_assert(testComparisons6(a1, a1, true, false), "");
  static_assert(testComparisons6(a1, a2, false, true), "");
  static_assert(testComparisons6(a2, a1, false, false), "");
  }
#endif
}