1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
10
11// <string_view>
12
13// Test nested types and default template args:
14
15// template<class charT, class traits = char_traits<charT>>
16// {
17// public:
18// // types:
19// using traits_type = traits;
20// using value_type = charT;
21// using pointer = value_type*;
22// using const_pointer = const value_type*;
23// using reference = value_type&;
24// using const_reference = const value_type&;
25// using const_iterator = implementation-defined ; // see 24.4.2.2
26// using iterator = const_iterator;
27// using const_reverse_iterator = reverse_iterator<const_iterator>;
28// using iterator = const_reverse_iterator;
29// using size_type = size_t;
30// using difference_type = ptrdiff_t;
31// static constexpr size_type npos = size_type(-1);
32//
33// };
34
35#include <string_view>
36#include <iterator>
37#include <type_traits>
38
39#include "test_macros.h"
40
41template <class Traits>
42void test() {
43 typedef std::basic_string_view<typename Traits::char_type, Traits> S;
44
45 static_assert((std::is_same<typename S::traits_type, Traits>::value), "");
46 static_assert((std::is_same<typename S::value_type, typename Traits::char_type>::value), "");
47 static_assert((std::is_same<typename S::size_type, std::size_t>::value), "");
48 static_assert((std::is_same<typename S::difference_type, std::ptrdiff_t>::value), "");
49 static_assert((std::is_same<typename S::reference, typename S::value_type&>::value), "");
50 static_assert((std::is_same<typename S::const_reference, const typename S::value_type&>::value), "");
51 static_assert((std::is_same<typename S::pointer, typename S::value_type*>::value), "");
52 static_assert((std::is_same<typename S::const_pointer, const typename S::value_type*>::value), "");
53 static_assert((std::is_same< typename std::iterator_traits<typename S::iterator>::iterator_category,
54 std::random_access_iterator_tag>::value),
55 "");
56 static_assert((std::is_same< typename std::iterator_traits<typename S::const_iterator>::iterator_category,
57 std::random_access_iterator_tag>::value),
58 "");
59 static_assert((std::is_same< typename S::reverse_iterator, std::reverse_iterator<typename S::iterator> >::value), "");
60 static_assert(
61 (std::is_same< typename S::const_reverse_iterator, std::reverse_iterator<typename S::const_iterator> >::value),
62 "");
63 static_assert(S::npos == -1, "");
64 static_assert((std::is_same<typename S::iterator, typename S::const_iterator>::value), "");
65 static_assert((std::is_same<typename S::reverse_iterator, typename S::const_reverse_iterator>::value), "");
66}
67
68int main(int, char**) {
69 test<std::char_traits<char> >();
70#ifndef TEST_HAS_NO_WIDE_CHARACTERS
71 test<std::char_traits<wchar_t> >();
72#endif
73#ifndef TEST_HAS_NO_CHAR8_T
74 test<std::char_traits<char8_t> >();
75#endif
76 static_assert((std::is_same<std::basic_string_view<char>::traits_type, std::char_traits<char> >::value), "");
77
78 return 0;
79}
80

source code of libcxx/test/std/strings/string.view/types.pass.cpp