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 // <string_view> 11 12 // const_iterator rbegin() const; 13 14 #include <experimental/string_view> 15 #include <cassert> 16 17 template <class S> 18 void 19 test(S s) 20 { 21 const S& cs = s; 22 typename S::reverse_iterator b = s.rbegin(); 23 typename S::const_reverse_iterator cb1 = cs.rbegin(); 24 typename S::const_reverse_iterator cb2 = s.crbegin(); 25 if (!s.empty()) 26 { 27 const size_t last = s.size() - 1; 28 assert( *b == s[last]); 29 assert( &*b == &s[last]); 30 assert( *cb1 == s[last]); 31 assert(&*cb1 == &s[last]); 32 assert( *cb2 == s[last]); 33 assert(&*cb2 == &s[last]); 34 35 } 36 assert( b == cb1); 37 assert( b == cb2); 38 assert(cb1 == cb2); 39 } 40 41 42 int main() 43 { 44 typedef std::experimental::string_view string_view; 45 typedef std::experimental::u16string_view u16string_view; 46 typedef std::experimental::u32string_view u32string_view; 47 typedef std::experimental::wstring_view wstring_view; 48 49 test(string_view ()); 50 test(u16string_view()); 51 test(u32string_view()); 52 test(wstring_view ()); 53 test(string_view ( "123")); 54 test(wstring_view (L"123")); 55 #if __cplusplus >= 201103L 56 test(u16string_view{u"123"}); 57 test(u32string_view{U"123"}); 58 #endif 59 } 60
