1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
10
11 // <string_view>
12
13 // constexpr const_iterator end() const;
14
15 #include <string_view>
16 #include <cassert>
17 #include <cstddef>
18
19 #include "test_macros.h"
20
21 template <class S>
22 void
test(S s)23 test(S s)
24 {
25 const S& cs = s;
26 typename S::iterator e = s.end();
27 typename S::const_iterator ce1 = cs.end();
28 typename S::const_iterator ce2 = s.cend();
29
30 if (s.empty())
31 {
32 assert( e == s.begin());
33 assert(ce1 == cs.begin());
34 assert(ce2 == s.begin());
35 }
36 else
37 {
38 assert( e != s.begin());
39 assert(ce1 != cs.begin());
40 assert(ce2 != s.begin());
41 }
42
43 assert(static_cast<std::size_t>( e - s.begin()) == s.size());
44 assert(static_cast<std::size_t>(ce1 - cs.begin()) == cs.size());
45 assert(static_cast<std::size_t>(ce2 - s.cbegin()) == s.size());
46
47 assert( e == ce1);
48 assert( e == ce2);
49 assert(ce1 == ce2);
50 }
51
52
main(int,char **)53 int main(int, char**)
54 {
55 typedef std::string_view string_view;
56 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
57 typedef std::u8string_view u8string_view;
58 #endif
59 typedef std::u16string_view u16string_view;
60 typedef std::u32string_view u32string_view;
61
62 test(string_view ());
63 test(u16string_view());
64 test(u32string_view());
65 test(string_view ( "123"));
66 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
67 test(u8string_view{u8"123"});
68 #endif
69 #if TEST_STD_VER >= 11
70 test(u16string_view{u"123"});
71 test(u32string_view{U"123"});
72 #endif
73
74 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
75 typedef std::wstring_view wstring_view;
76 test(wstring_view ());
77 test(wstring_view (L"123"));
78 #endif
79
80 #if TEST_STD_VER > 11
81 {
82 constexpr string_view sv { "123", 3 };
83 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
84 constexpr u8string_view u8sv {u8"123", 3 };
85 #endif
86 constexpr u16string_view u16sv {u"123", 3 };
87 constexpr u32string_view u32sv {U"123", 3 };
88
89 static_assert ( sv.begin() != sv.end(), "" );
90 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
91 static_assert ( u8sv.begin() != u8sv.end(), "" );
92 #endif
93 static_assert ( u16sv.begin() != u16sv.end(), "" );
94 static_assert ( u32sv.begin() != u32sv.end(), "" );
95
96 static_assert ( sv.begin() != sv.cend(), "" );
97 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
98 static_assert ( u8sv.begin() != u8sv.cend(), "" );
99 #endif
100 static_assert ( u16sv.begin() != u16sv.cend(), "" );
101 static_assert ( u32sv.begin() != u32sv.cend(), "" );
102
103 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
104 {
105 constexpr wstring_view wsv {L"123", 3 };
106 static_assert ( wsv.begin() != wsv.end(), "" );
107 static_assert ( wsv.begin() != wsv.cend(), "" );
108 }
109 #endif
110 }
111 #endif // TEST_STD_VER > 11
112
113 return 0;
114 }
115