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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
//
//===----------------------------------------------------------------------===//
// <string_view>
// Test nested types and default template args:
// template<class charT, class traits = char_traits<charT>>
// {
// public:
// // types:
// using traits_type = traits;
// using value_type = charT;
// using pointer = value_type*;
// using const_pointer = const value_type*;
// using reference = value_type&;
// using const_reference = const value_type&;
// using const_iterator = implementation-defined ; // see 24.4.2.2
// using iterator = const_iterator;
// using const_reverse_iterator = reverse_iterator<const_iterator>;
// using iterator = const_reverse_iterator;
// using size_type = size_t;
// using difference_type = ptrdiff_t;
// static constexpr size_type npos = size_type(-1);
//
// };
#include <string_view>
#include <iterator>
#include <type_traits>
#include "test_macros.h"
template <class Traits>
void
test()
{
typedef std::basic_string_view<typename Traits::char_type, Traits> S;
static_assert((std::is_same<typename S::traits_type, Traits>::value), "");
static_assert((std::is_same<typename S::value_type, typename Traits::char_type>::value), "");
static_assert((std::is_same<typename S::size_type, std::size_t>::value), "");
static_assert((std::is_same<typename S::difference_type, ptrdiff_t>::value), "");
static_assert((std::is_same<typename S::reference, typename S::value_type&>::value), "");
static_assert((std::is_same<typename S::const_reference, const typename S::value_type&>::value), "");
static_assert((std::is_same<typename S::pointer, typename S::value_type*>::value), "");
static_assert((std::is_same<typename S::const_pointer, const typename S::value_type*>::value), "");
static_assert((std::is_same<
typename std::iterator_traits<typename S::iterator>::iterator_category,
std::random_access_iterator_tag>::value), "");
static_assert((std::is_same<
typename std::iterator_traits<typename S::const_iterator>::iterator_category,
std::random_access_iterator_tag>::value), "");
static_assert((std::is_same<
typename S::reverse_iterator,
std::reverse_iterator<typename S::iterator> >::value), "");
static_assert((std::is_same<
typename S::const_reverse_iterator,
std::reverse_iterator<typename S::const_iterator> >::value), "");
static_assert(S::npos == -1, "");
static_assert((std::is_same<typename S::iterator, typename S::const_iterator>::value), "");
static_assert((std::is_same<typename S::reverse_iterator, typename S::const_reverse_iterator>::value), "");
}
int main(int, char**)
{
test<std::char_traits<char> >();
test<std::char_traits<wchar_t> >();
#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
test<std::char_traits<char8_t> >();
#endif
static_assert((std::is_same<std::basic_string_view<char>::traits_type,
std::char_traits<char> >::value), "");
return 0;
}
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