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> 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> 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 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 51 int main(int, char**) { 52 test(); 53 54 return 0; 55 } 56