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
11 // <string_view>
12
13 // [string.view.capacity], capacity
14 // constexpr size_type size() const noexcept;
15 // constexpr size_type length() const noexcept;
16 // constexpr size_type max_size() const noexcept;
17 // constexpr bool empty() const noexcept;
18
19 #include <string_view>
20 #include <cassert>
21
22 #include "test_macros.h"
23
24 template<typename SV>
test1()25 void test1 () {
26 #if TEST_STD_VER > 11
27 {
28 constexpr SV sv1;
29 static_assert ( sv1.size() == 0, "" );
30 static_assert ( sv1.empty(), "");
31 static_assert ( sv1.size() == sv1.length(), "" );
32 static_assert ( sv1.max_size() > sv1.size(), "");
33 }
34 #endif
35
36 {
37 SV sv1;
38 ASSERT_NOEXCEPT(sv1.size());
39 ASSERT_NOEXCEPT(sv1.empty());
40 ASSERT_NOEXCEPT(sv1.max_size());
41 ASSERT_NOEXCEPT(sv1.length());
42 assert ( sv1.size() == 0 );
43 assert ( sv1.empty());
44 assert ( sv1.size() == sv1.length());
45 assert ( sv1.max_size() > sv1.size());
46 }
47 }
48
49 template<typename CharT>
test2(const CharT * s,size_t len)50 void test2 ( const CharT *s, size_t len ) {
51 {
52 std::basic_string_view<CharT> sv1 ( s );
53 assert ( sv1.size() == len );
54 assert ( sv1.data() == s );
55 assert ( sv1.empty() == (len == 0));
56 assert ( sv1.size() == sv1.length());
57 assert ( sv1.max_size() > sv1.size());
58 #if TEST_STD_VER > 14
59 // make sure we pick up std::size, too!
60 assert ( sv1.size() == std::size(sv1));
61 assert ( sv1.empty() == std::empty(sv1));
62 #endif
63 }
64 }
65
main()66 int main () {
67 test1<std::string_view> ();
68 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
69 test1<std::u8string_view> ();
70 #endif
71 test1<std::u16string_view> ();
72 test1<std::u32string_view> ();
73 test1<std::wstring_view> ();
74
75 test2 ( "ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE", 105 );
76 test2 ( "ABCDE", 5 );
77 test2 ( "a", 1 );
78 test2 ( "", 0 );
79
80 test2 ( L"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE", 105 );
81 test2 ( L"ABCDE", 5 );
82 test2 ( L"a", 1 );
83 test2 ( L"", 0 );
84
85 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
86 test2 ( u8"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE", 105 );
87 test2 ( u8"ABCDE", 5 );
88 test2 ( u8"a", 1 );
89 test2 ( u8"", 0 );
90 #endif
91
92 #if TEST_STD_VER >= 11
93 test2 ( u"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE", 105 );
94 test2 ( u"ABCDE", 5 );
95 test2 ( u"a", 1 );
96 test2 ( u"", 0 );
97
98 test2 ( U"ABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDEABCDE", 105 );
99 test2 ( U"ABCDE", 5 );
100 test2 ( U"a", 1 );
101 test2 ( U"", 0 );
102 #endif
103 }
104