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 // UNSUPPORTED: c++03, c++11, c++14, c++17
9
10 // <string_view>
11
12 // template <contiguous_iterator _It, sized_sentinel_for<_It> _End>
13 // basic_string_view(_It, _End) -> basic_string_view<iter_value_t<_It>>;
14
15 #include <string_view>
16 #include <cassert>
17
18 #include "make_string.h"
19 #include "test_macros.h"
20 #include "test_iterators.h"
21
22 template <class It, class Sentinel, class CharT>
test_ctad(std::basic_string_view<CharT> val)23 constexpr void test_ctad(std::basic_string_view<CharT> val) {
24 auto sv = std::basic_string_view(It(val.data()), Sentinel(It(val.data() + val.size())));
25 ASSERT_SAME_TYPE(decltype(sv), std::basic_string_view<CharT>);
26 assert(sv.data() == val.data());
27 assert(sv.size() == val.size());
28 }
29
30 template <class CharT>
test_with_char()31 constexpr void test_with_char() {
32 const auto val = MAKE_STRING_VIEW(CharT, "test");
33 test_ctad<CharT*, CharT*>(val);
34 test_ctad<CharT*, const CharT*>(val);
35 test_ctad<const CharT*, CharT*>(val);
36 test_ctad<const CharT*, sized_sentinel<const CharT*>>(val);
37 test_ctad<contiguous_iterator<const CharT*>, contiguous_iterator<const CharT*>>(val);
38 test_ctad<contiguous_iterator<const CharT*>, sized_sentinel<contiguous_iterator<const CharT*>>>(val);
39 }
40
test()41 constexpr void test() {
42 test_with_char<char>();
43 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
44 test_with_char<wchar_t>();
45 #endif
46 test_with_char<char8_t>();
47 test_with_char<char16_t>();
48 test_with_char<char32_t>();
49 }
50
main(int,char **)51 int main(int, char**) {
52 test();
53
54 return 0;
55 }
56