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// -*- C++ -*-
//===------------------------------ span ---------------------------------===//
//
// 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
//
//===---------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17
// <span>
// constexpr span(const span& other) noexcept = default;
#include <span>
#include <cassert>
#include <string>
#include "test_macros.h"
template <typename T>
constexpr bool doCopy(const T &rhs)
{
ASSERT_NOEXCEPT(T{rhs});
T lhs{rhs};
return lhs.data() == rhs.data()
&& lhs.size() == rhs.size();
}
struct A{};
template <typename T>
void testCV ()
{
int arr[] = {1,2,3};
assert((doCopy(std::span<T> () )));
assert((doCopy(std::span<T,0>() )));
assert((doCopy(std::span<T> (&arr[0], 1))));
assert((doCopy(std::span<T,1>(&arr[0], 1))));
assert((doCopy(std::span<T> (&arr[0], 2))));
assert((doCopy(std::span<T,2>(&arr[0], 2))));
}
int main(int, char**)
{
constexpr int carr[] = {1,2,3};
static_assert(doCopy(std::span< int> ()), "");
static_assert(doCopy(std::span< int,0>()), "");
static_assert(doCopy(std::span<const int> (&carr[0], 1)), "");
static_assert(doCopy(std::span<const int,1>(&carr[0], 1)), "");
static_assert(doCopy(std::span<const int> (&carr[0], 2)), "");
static_assert(doCopy(std::span<const int,2>(&carr[0], 2)), "");
static_assert(doCopy(std::span<long>()), "");
static_assert(doCopy(std::span<double>()), "");
static_assert(doCopy(std::span<A>()), "");
std::string s;
assert(doCopy(std::span<std::string> () ));
assert(doCopy(std::span<std::string, 0>() ));
assert(doCopy(std::span<std::string> (&s, 1)));
assert(doCopy(std::span<std::string, 1>(&s, 1)));
testCV< int>();
testCV<const int>();
testCV< volatile int>();
testCV<const volatile int>();
return 0;
}
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