end.pass.cpp (3006B)
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 #include <cstddef> 17 18 #include "test_macros.h" 19 20 template <class S> 21 void 22 test(S s) 23 { 24 const S& cs = s; 25 typename S::iterator e = s.end(); 26 typename S::const_iterator ce1 = cs.end(); 27 typename S::const_iterator ce2 = s.cend(); 28 29 if (s.empty()) 30 { 31 assert( e == s.begin()); 32 assert(ce1 == cs.begin()); 33 assert(ce2 == s.begin()); 34 } 35 else 36 { 37 assert( e != s.begin()); 38 assert(ce1 != cs.begin()); 39 assert(ce2 != s.begin()); 40 } 41 42 assert(static_cast<std::size_t>( e - s.begin()) == s.size()); 43 assert(static_cast<std::size_t>(ce1 - cs.begin()) == cs.size()); 44 assert(static_cast<std::size_t>(ce2 - s.cbegin()) == s.size()); 45 46 assert( e == ce1); 47 assert( e == ce2); 48 assert(ce1 == ce2); 49 } 50 51 52 int main() 53 { 54 typedef std::string_view string_view; 55 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L 56 typedef std::u8string_view u8string_view; 57 #endif 58 typedef std::u16string_view u16string_view; 59 typedef std::u32string_view u32string_view; 60 typedef std::wstring_view wstring_view; 61 62 test(string_view ()); 63 test(u16string_view()); 64 test(u32string_view()); 65 test(wstring_view ()); 66 test(string_view ( "123")); 67 test(wstring_view (L"123")); 68 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L 69 test(u8string_view{u8"123"}); 70 #endif 71 #if TEST_STD_VER >= 11 72 test(u16string_view{u"123"}); 73 test(u32string_view{U"123"}); 74 #endif 75 76 #if TEST_STD_VER > 11 77 { 78 constexpr string_view sv { "123", 3 }; 79 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L 80 constexpr u8string_view u8sv {u8"123", 3 }; 81 #endif 82 constexpr u16string_view u16sv {u"123", 3 }; 83 constexpr u32string_view u32sv {U"123", 3 }; 84 constexpr wstring_view wsv {L"123", 3 }; 85 86 static_assert ( sv.begin() != sv.end(), "" ); 87 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L 88 static_assert ( u8sv.begin() != u8sv.end(), "" ); 89 #endif 90 static_assert ( u16sv.begin() != u16sv.end(), "" ); 91 static_assert ( u32sv.begin() != u32sv.end(), "" ); 92 static_assert ( wsv.begin() != wsv.end(), "" ); 93 94 static_assert ( sv.begin() != sv.cend(), "" ); 95 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L 96 static_assert ( u8sv.begin() != u8sv.cend(), "" ); 97 #endif 98 static_assert ( u16sv.begin() != u16sv.cend(), "" ); 99 static_assert ( u32sv.begin() != u32sv.cend(), "" ); 100 static_assert ( wsv.begin() != wsv.cend(), "" ); 101 } 102 #endif 103 }