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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>
// template<class T, size_t N>
// span(T (&)[N]) -> span<T, N>;
//
// template<class T, size_t N>
// span(array<T, N>&) -> span<T, N>;
//
// template<class T, size_t N>
// span(const array<T, N>&) -> span<const T, N>;
//
// template<class Container>
// span(Container&) -> span<typename Container::value_type>;
//
// template<class Container>
// span(const Container&) -> span<const typename Container::value_type>;
#include <span>
#include <algorithm>
#include <array>
#include <cassert>
#include <string>
#include <type_traits>
#include "test_macros.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(int, char**)
{
{
int arr[] = {1,2,3};
std::span s{arr};
using S = decltype(s);
ASSERT_SAME_TYPE(S, std::span<int, 3>);
assert((std::equal(std::begin(arr), std::end(arr), s.begin(), s.end())));
}
{
std::array<double, 4> arr = {1.0, 2.0, 3.0, 4.0};
std::span s{arr};
using S = decltype(s);
ASSERT_SAME_TYPE(S, std::span<double, 4>);
assert((std::equal(std::begin(arr), std::end(arr), s.begin(), s.end())));
}
{
const std::array<long, 5> arr = {4, 5, 6, 7, 8};
std::span s{arr};
using S = decltype(s);
ASSERT_SAME_TYPE(S, std::span<const long, 5>);
assert((std::equal(std::begin(arr), std::end(arr), s.begin(), s.end())));
}
{
std::string str{"ABCDE"};
std::span s{str};
using S = decltype(s);
ASSERT_SAME_TYPE(S, std::span<char>);
assert((size_t)s.size() == str.size());
assert((std::equal(s.begin(), s.end(), std::begin(s), std::end(s))));
}
{
const std::string str{"QWERTYUIOP"};
std::span s{str};
using S = decltype(s);
ASSERT_SAME_TYPE(S, std::span<const char>);
assert((size_t)s.size() == str.size());
assert((std::equal(s.begin(), s.end(), std::begin(s), std::end(s))));
}
return 0;
}
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