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 const _CharT& back(); 14 15 #include <experimental/string_view> 16 #include <cassert> 17 18 template <typename CharT> 19 bool test ( const CharT *s, size_t len ) { 20 std::experimental::basic_string_view<CharT> sv ( s, len ); 21 assert ( sv.length() == len ); 22 assert ( sv.front() == s[0] ); 23 return &sv.front() == s; 24 } 25 26 int main () { 27 assert ( test ( "ABCDE", 5 )); 28 assert ( test ( "a", 1 )); 29 30 assert ( test ( L"ABCDE", 5 )); 31 assert ( test ( L"a", 1 )); 32 33 #if __cplusplus >= 201103L 34 assert ( test ( u"ABCDE", 5 )); 35 assert ( test ( u"a", 1 )); 36 37 assert ( test ( U"ABCDE", 5 )); 38 assert ( test ( U"a", 1 )); 39 #endif 40 41 #if __cplusplus >= 201103L 42 { 43 constexpr std::experimental::basic_string_view<char> sv ( "ABC", 2 ); 44 static_assert ( sv.length() == 2, "" ); 45 static_assert ( sv.front() == 'A', "" ); 46 } 47 #endif 48 } 49
