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 10 // <string_view> 11 12 // constexpr basic_string_view(const _CharT* _s) 13 // : __data (_s), __size(_Traits::length(_s)) {} 14 15 16 #include <string_view> 17 #include <string> 18 #include <cassert> 19 20 #include "test_macros.h" 21 #include "constexpr_char_traits.h" 22 23 template<typename CharT> StrLen(const CharT * s)24size_t StrLen ( const CharT *s ) { 25 size_t retVal = 0; 26 while ( *s != 0 ) { ++retVal; ++s; } 27 return retVal; 28 } 29 30 template<typename CharT> test(const CharT * s)31void test ( const CharT *s ) { 32 typedef std::basic_string_view<CharT> SV; 33 // I'd love to do this, but it would require traits::length() to be noexcept 34 // LIBCPP_ASSERT_NOEXCEPT(SV(s)); 35 36 SV sv1 ( s ); 37 assert ( sv1.size() == StrLen( s )); 38 assert ( sv1.data() == s ); 39 } 40 41 main(int,char **)42int main(int, char**) { 43 44 test ( "QBCDE" ); 45 test ( "A" ); 46 test ( "" ); 47 48 test ( L"QBCDE" ); 49 test ( L"A" ); 50 test ( L"" ); 51 52 #if TEST_STD_VER >= 11 53 test ( u"QBCDE" ); 54 test ( u"A" ); 55 test ( u"" ); 56 57 test ( U"QBCDE" ); 58 test ( U"A" ); 59 test ( U"" ); 60 #endif 61 62 #if TEST_STD_VER > 11 63 { 64 constexpr std::basic_string_view<char, constexpr_char_traits<char>> sv1 ( "ABCDE" ); 65 static_assert ( sv1.size() == 5, ""); 66 } 67 #endif 68 69 return 0; 70 } 71