contiguous.pass.cpp
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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <array>
// GCC 5 doesn't implement the required constexpr support
// UNSUPPORTED: gcc-5
// An array is a contiguous container
#include <array>
#include <cassert>
#include "test_macros.h"
template <class Container>
TEST_CONSTEXPR_CXX14 void assert_contiguous(Container const& c)
{
for (size_t i = 0; i < c.size(); ++i)
assert(*(c.begin() + i) == *(std::addressof(*c.begin()) + i));
}
TEST_CONSTEXPR_CXX17 bool tests()
{
assert_contiguous(std::array<double, 0>());
assert_contiguous(std::array<double, 1>());
assert_contiguous(std::array<double, 2>());
assert_contiguous(std::array<double, 3>());
assert_contiguous(std::array<char, 0>());
assert_contiguous(std::array<char, 1>());
assert_contiguous(std::array<char, 2>());
assert_contiguous(std::array<char, 3>());
return true;
}
int main(int, char**)
{
tests();
#if TEST_STD_VER >= 17 // begin() & friends are constexpr in >= C++17 only
static_assert(tests(), "");
#endif
return 0;
}