1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 11 // <string_view> 12 13 // constexpr basic_string_view(const _CharT* _s) 14 // : __data (_s), __size(_Traits::length(_s)) {} 15 16 17 #include <string_view> 18 #include <string> 19 #include <cassert> 20 21 #include "test_macros.h" 22 #include "constexpr_char_traits.hpp" 23 24 template<typename CharT> 25 size_t StrLen ( const CharT *s ) { 26 size_t retVal = 0; 27 while ( *s != 0 ) { ++retVal; ++s; } 28 return retVal; 29 } 30 31 template<typename CharT> 32 void test ( const CharT *s ) { 33 typedef std::basic_string_view<CharT> SV; 34 // I'd love to do this, but it would require traits::length() to be noexcept 35 // LIBCPP_ASSERT_NOEXCEPT(SV(s)); 36 37 SV sv1 ( s ); 38 assert ( sv1.size() == StrLen( s )); 39 assert ( sv1.data() == s ); 40 } 41 42 43 int main () { 44 45 test ( "QBCDE" ); 46 test ( "A" ); 47 test ( "" ); 48 49 test ( L"QBCDE" ); 50 test ( L"A" ); 51 test ( L"" ); 52 53 #if TEST_STD_VER >= 11 54 test ( u"QBCDE" ); 55 test ( u"A" ); 56 test ( u"" ); 57 58 test ( U"QBCDE" ); 59 test ( U"A" ); 60 test ( U"" ); 61 #endif 62 63 #if TEST_STD_VER > 11 64 { 65 constexpr std::basic_string_view<char, constexpr_char_traits<char>> sv1 ( "ABCDE" ); 66 static_assert ( sv1.size() == 5, ""); 67 } 68 #endif 69 } 70
