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 // constexpr const_iterator end() const; 13 14 #include <string_view> 15 #include <cassert> 16 17 #include "test_macros.h" 18 19 template <class S> 20 void 21 test(S s) 22 { 23 const S& cs = s; 24 typename S::iterator e = s.end(); 25 typename S::const_iterator ce1 = cs.end(); 26 typename S::const_iterator ce2 = s.cend(); 27 28 if (s.empty()) 29 { 30 assert( e == s.begin()); 31 assert(ce1 == cs.begin()); 32 assert(ce2 == s.begin()); 33 } 34 else 35 { 36 assert( e != s.begin()); 37 assert(ce1 != cs.begin()); 38 assert(ce2 != s.begin()); 39 } 40 41 assert( e - s.begin() == s.size()); 42 assert(ce1 - cs.begin() == cs.size()); 43 assert(ce2 - s.cbegin() == s.size()); 44 45 assert( e == ce1); 46 assert( e == ce2); 47 assert(ce1 == ce2); 48 } 49 50 51 int main() 52 { 53 typedef std::string_view string_view; 54 typedef std::u16string_view u16string_view; 55 typedef std::u32string_view u32string_view; 56 typedef std::wstring_view wstring_view; 57 58 test(string_view ()); 59 test(u16string_view()); 60 test(u32string_view()); 61 test(wstring_view ()); 62 test(string_view ( "123")); 63 test(wstring_view (L"123")); 64 #if TEST_STD_VER >= 11 65 test(u16string_view{u"123"}); 66 test(u32string_view{U"123"}); 67 #endif 68 69 #if TEST_STD_VER > 11 70 { 71 constexpr string_view sv { "123", 3 }; 72 constexpr u16string_view u16sv {u"123", 3 }; 73 constexpr u32string_view u32sv {U"123", 3 }; 74 constexpr wstring_view wsv {L"123", 3 }; 75 76 static_assert ( sv.begin() != sv.end(), "" ); 77 static_assert ( u16sv.begin() != u16sv.end(), "" ); 78 static_assert ( u32sv.begin() != u32sv.end(), "" ); 79 static_assert ( wsv.begin() != wsv.end(), "" ); 80 81 static_assert ( sv.begin() != sv.cend(), "" ); 82 static_assert ( u16sv.begin() != u16sv.cend(), "" ); 83 static_assert ( u32sv.begin() != u32sv.cend(), "" ); 84 static_assert ( wsv.begin() != wsv.cend(), "" ); 85 } 86 #endif 87 } 88