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
test(S s)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
main()52 int main()
53 {
54 typedef std::string_view string_view;
55 typedef std::u16string_view u16string_view;
56 typedef std::u32string_view u32string_view;
57 typedef std::wstring_view wstring_view;
58
59 test(string_view ());
60 test(u16string_view());
61 test(u32string_view());
62 test(wstring_view ());
63 test(string_view ( "123"));
64 test(wstring_view (L"123"));
65 #if TEST_STD_VER >= 11
66 test(u16string_view{u"123"});
67 test(u32string_view{U"123"});
68 #endif
69
70 #if TEST_STD_VER > 11
71 {
72 constexpr string_view sv { "123", 3 };
73 constexpr u16string_view u16sv {u"123", 3 };
74 constexpr u32string_view u32sv {U"123", 3 };
75 constexpr wstring_view wsv {L"123", 3 };
76
77 static_assert ( sv.begin() != sv.end(), "" );
78 static_assert ( u16sv.begin() != u16sv.end(), "" );
79 static_assert ( u32sv.begin() != u32sv.end(), "" );
80 static_assert ( wsv.begin() != wsv.end(), "" );
81
82 static_assert ( sv.begin() != sv.cend(), "" );
83 static_assert ( u16sv.begin() != u16sv.cend(), "" );
84 static_assert ( u32sv.begin() != u32sv.cend(), "" );
85 static_assert ( wsv.begin() != wsv.cend(), "" );
86 }
87 #endif
88 }
89