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 int compare(const charT* s) const;
14
15 #include <string_view>
16 #include <cassert>
17
18 #include "test_macros.h"
19 #include "constexpr_char_traits.h"
20
sign(int x)21 int sign ( int x ) { return x > 0 ? 1 : ( x < 0 ? -1 : 0 ); }
22
23 template<typename CharT>
test1(std::basic_string_view<CharT> sv1,const CharT * s,int expected)24 void test1 ( std::basic_string_view<CharT> sv1, const CharT *s, int expected ) {
25 assert ( sign( sv1.compare(s)) == sign(expected));
26 }
27
28 template<typename CharT>
29 void
test(const CharT * s1,const CharT * s2,int expected)30 test( const CharT *s1, const CharT *s2, int expected)
31 {
32 typedef std::basic_string_view<CharT> string_view_t;
33 string_view_t sv1 ( s1 );
34 test1 ( sv1, s2, expected );
35 }
36
main(int,char **)37 int main(int, char**)
38 {
39 {
40 test("", "", 0);
41 test("", "abcde", -5);
42 test("", "abcdefghij", -10);
43 test("", "abcdefghijklmnopqrst", -20);
44 test("abcde", "", 5);
45 test("abcde", "abcde", 0);
46 test("abcde", "abcdefghij", -5);
47 test("abcde", "abcdefghijklmnopqrst", -15);
48 test("abcdefghij", "", 10);
49 test("abcdefghij", "abcde", 5);
50 test("abcdefghij", "abcdefghij", 0);
51 test("abcdefghij", "abcdefghijklmnopqrst", -10);
52 test("abcdefghijklmnopqrst", "", 20);
53 test("abcdefghijklmnopqrst", "abcde", 15);
54 test("abcdefghijklmnopqrst", "abcdefghij", 10);
55 test("abcdefghijklmnopqrst", "abcdefghijklmnopqrst", 0);
56 }
57
58 {
59 test(L"", L"", 0);
60 test(L"", L"abcde", -5);
61 test(L"", L"abcdefghij", -10);
62 test(L"", L"abcdefghijklmnopqrst", -20);
63 test(L"abcde", L"", 5);
64 test(L"abcde", L"abcde", 0);
65 test(L"abcde", L"abcdefghij", -5);
66 test(L"abcde", L"abcdefghijklmnopqrst", -15);
67 test(L"abcdefghij", L"", 10);
68 test(L"abcdefghij", L"abcde", 5);
69 test(L"abcdefghij", L"abcdefghij", 0);
70 test(L"abcdefghij", L"abcdefghijklmnopqrst", -10);
71 test(L"abcdefghijklmnopqrst", L"", 20);
72 test(L"abcdefghijklmnopqrst", L"abcde", 15);
73 test(L"abcdefghijklmnopqrst", L"abcdefghij", 10);
74 test(L"abcdefghijklmnopqrst", L"abcdefghijklmnopqrst", 0);
75 }
76
77 #if TEST_STD_VER >= 11
78 {
79 test(U"", U"", 0);
80 test(U"", U"abcde", -5);
81 test(U"", U"abcdefghij", -10);
82 test(U"", U"abcdefghijklmnopqrst", -20);
83 test(U"abcde", U"", 5);
84 test(U"abcde", U"abcde", 0);
85 test(U"abcde", U"abcdefghij", -5);
86 test(U"abcde", U"abcdefghijklmnopqrst", -15);
87 test(U"abcdefghij", U"", 10);
88 test(U"abcdefghij", U"abcde", 5);
89 test(U"abcdefghij", U"abcdefghij", 0);
90 test(U"abcdefghij", U"abcdefghijklmnopqrst", -10);
91 test(U"abcdefghijklmnopqrst", U"", 20);
92 test(U"abcdefghijklmnopqrst", U"abcde", 15);
93 test(U"abcdefghijklmnopqrst", U"abcdefghij", 10);
94 test(U"abcdefghijklmnopqrst", U"abcdefghijklmnopqrst", 0);
95 }
96
97 {
98 test(u"", u"", 0);
99 test(u"", u"abcde", -5);
100 test(u"", u"abcdefghij", -10);
101 test(u"", u"abcdefghijklmnopqrst", -20);
102 test(u"abcde", u"", 5);
103 test(u"abcde", u"abcde", 0);
104 test(u"abcde", u"abcdefghij", -5);
105 test(u"abcde", u"abcdefghijklmnopqrst", -15);
106 test(u"abcdefghij", u"", 10);
107 test(u"abcdefghij", u"abcde", 5);
108 test(u"abcdefghij", u"abcdefghij", 0);
109 test(u"abcdefghij", u"abcdefghijklmnopqrst", -10);
110 test(u"abcdefghijklmnopqrst", u"", 20);
111 test(u"abcdefghijklmnopqrst", u"abcde", 15);
112 test(u"abcdefghijklmnopqrst", u"abcdefghij", 10);
113 test(u"abcdefghijklmnopqrst", u"abcdefghijklmnopqrst", 0);
114 }
115 #endif
116
117 #if TEST_STD_VER > 11
118 {
119 typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
120 constexpr SV sv1;
121 constexpr SV sv2 { "abcde", 5 };
122 static_assert ( sv1.compare("") == 0, "" );
123 static_assert ( sv1.compare("abcde") < 0, "" );
124 static_assert ( sv2.compare("") > 0, "" );
125 static_assert ( sv2.compare("abcde") == 0, "" );
126 }
127 #endif
128
129 return 0;
130 }
131