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 // <string_view>
10
11 // constexpr int compare(const charT* s) const;
12
13 #include <string_view>
14 #include <cassert>
15
16 #include "test_macros.h"
17 #include "constexpr_char_traits.h"
18
sign(int x)19 int sign ( int x ) { return x > 0 ? 1 : ( x < 0 ? -1 : 0 ); }
20
21 template<typename CharT>
test1(std::basic_string_view<CharT> sv1,const CharT * s,int expected)22 void test1 ( std::basic_string_view<CharT> sv1, const CharT *s, int expected ) {
23 assert ( sign( sv1.compare(s)) == sign(expected));
24 }
25
26 template<typename CharT>
27 void
test(const CharT * s1,const CharT * s2,int expected)28 test( const CharT *s1, const CharT *s2, int expected)
29 {
30 typedef std::basic_string_view<CharT> string_view_t;
31 string_view_t sv1 ( s1 );
32 test1 ( sv1, s2, expected );
33 }
34
main(int,char **)35 int main(int, char**)
36 {
37 {
38 test("", "", 0);
39 test("", "abcde", -5);
40 test("", "abcdefghij", -10);
41 test("", "abcdefghijklmnopqrst", -20);
42 test("abcde", "", 5);
43 test("abcde", "abcde", 0);
44 test("abcde", "abcdefghij", -5);
45 test("abcde", "abcdefghijklmnopqrst", -15);
46 test("abcdefghij", "", 10);
47 test("abcdefghij", "abcde", 5);
48 test("abcdefghij", "abcdefghij", 0);
49 test("abcdefghij", "abcdefghijklmnopqrst", -10);
50 test("abcdefghijklmnopqrst", "", 20);
51 test("abcdefghijklmnopqrst", "abcde", 15);
52 test("abcdefghijklmnopqrst", "abcdefghij", 10);
53 test("abcdefghijklmnopqrst", "abcdefghijklmnopqrst", 0);
54 }
55
56 {
57 test(L"", L"", 0);
58 test(L"", L"abcde", -5);
59 test(L"", L"abcdefghij", -10);
60 test(L"", L"abcdefghijklmnopqrst", -20);
61 test(L"abcde", L"", 5);
62 test(L"abcde", L"abcde", 0);
63 test(L"abcde", L"abcdefghij", -5);
64 test(L"abcde", L"abcdefghijklmnopqrst", -15);
65 test(L"abcdefghij", L"", 10);
66 test(L"abcdefghij", L"abcde", 5);
67 test(L"abcdefghij", L"abcdefghij", 0);
68 test(L"abcdefghij", L"abcdefghijklmnopqrst", -10);
69 test(L"abcdefghijklmnopqrst", L"", 20);
70 test(L"abcdefghijklmnopqrst", L"abcde", 15);
71 test(L"abcdefghijklmnopqrst", L"abcdefghij", 10);
72 test(L"abcdefghijklmnopqrst", L"abcdefghijklmnopqrst", 0);
73 }
74
75 #if TEST_STD_VER >= 11
76 {
77 test(U"", U"", 0);
78 test(U"", U"abcde", -5);
79 test(U"", U"abcdefghij", -10);
80 test(U"", U"abcdefghijklmnopqrst", -20);
81 test(U"abcde", U"", 5);
82 test(U"abcde", U"abcde", 0);
83 test(U"abcde", U"abcdefghij", -5);
84 test(U"abcde", U"abcdefghijklmnopqrst", -15);
85 test(U"abcdefghij", U"", 10);
86 test(U"abcdefghij", U"abcde", 5);
87 test(U"abcdefghij", U"abcdefghij", 0);
88 test(U"abcdefghij", U"abcdefghijklmnopqrst", -10);
89 test(U"abcdefghijklmnopqrst", U"", 20);
90 test(U"abcdefghijklmnopqrst", U"abcde", 15);
91 test(U"abcdefghijklmnopqrst", U"abcdefghij", 10);
92 test(U"abcdefghijklmnopqrst", U"abcdefghijklmnopqrst", 0);
93 }
94
95 {
96 test(u"", u"", 0);
97 test(u"", u"abcde", -5);
98 test(u"", u"abcdefghij", -10);
99 test(u"", u"abcdefghijklmnopqrst", -20);
100 test(u"abcde", u"", 5);
101 test(u"abcde", u"abcde", 0);
102 test(u"abcde", u"abcdefghij", -5);
103 test(u"abcde", u"abcdefghijklmnopqrst", -15);
104 test(u"abcdefghij", u"", 10);
105 test(u"abcdefghij", u"abcde", 5);
106 test(u"abcdefghij", u"abcdefghij", 0);
107 test(u"abcdefghij", u"abcdefghijklmnopqrst", -10);
108 test(u"abcdefghijklmnopqrst", u"", 20);
109 test(u"abcdefghijklmnopqrst", u"abcde", 15);
110 test(u"abcdefghijklmnopqrst", u"abcdefghij", 10);
111 test(u"abcdefghijklmnopqrst", u"abcdefghijklmnopqrst", 0);
112 }
113 #endif
114
115 #if TEST_STD_VER > 11
116 {
117 typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
118 constexpr SV sv1;
119 constexpr SV sv2 { "abcde", 5 };
120 static_assert ( sv1.compare("") == 0, "" );
121 static_assert ( sv1.compare("abcde") < 0, "" );
122 static_assert ( sv2.compare("") > 0, "" );
123 static_assert ( sv2.compare("abcde") == 0, "" );
124 }
125 #endif
126
127 return 0;
128 }
129