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
10 // <string_view>
11 // constexpr int compare(basic_string_view str) const noexcept;
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,std::basic_string_view<CharT> sv2,int expected)22 void test1 ( std::basic_string_view<CharT> sv1,
23 std::basic_string_view<CharT> sv2, int expected ) {
24 assert ( sign( sv1.compare(sv2)) == sign(expected));
25 }
26
27
28 template<typename CharT>
test(const CharT * s1,const CharT * s2,int expected)29 void test ( const CharT *s1, const CharT *s2, int expected ) {
30 typedef std::basic_string_view<CharT> string_view_t;
31
32 string_view_t sv1 ( s1 );
33 string_view_t sv2 ( s2 );
34 test1(sv1, sv2, expected);
35 }
36
main(int,char **)37 int main(int, char**) {
38
39 test("", "", 0);
40 test("", "abcde", -5);
41 test("", "abcdefghij", -10);
42 test("", "abcdefghijklmnopqrst", -20);
43 test("abcde", "", 5);
44 test("abcde", "abcde", 0);
45 test("abcde", "abcdefghij", -5);
46 test("abcde", "abcdefghijklmnopqrst", -15);
47 test("abcdefghij", "", 10);
48 test("abcdefghij", "abcde", 5);
49 test("abcdefghij", "abcdefghij", 0);
50 test("abcdefghij", "abcdefghijklmnopqrst", -10);
51 test("abcdefghijklmnopqrst", "", 20);
52 test("abcdefghijklmnopqrst", "abcde", 15);
53 test("abcdefghijklmnopqrst", "abcdefghij", 10);
54 test("abcdefghijklmnopqrst", "abcdefghijklmnopqrst", 0);
55
56 test(L"", L"", 0);
57 test(L"", L"abcde", -5);
58 test(L"", L"abcdefghij", -10);
59 test(L"", L"abcdefghijklmnopqrst", -20);
60 test(L"abcde", L"", 5);
61 test(L"abcde", L"abcde", 0);
62 test(L"abcde", L"abcdefghij", -5);
63 test(L"abcde", L"abcdefghijklmnopqrst", -15);
64 test(L"abcdefghij", L"", 10);
65 test(L"abcdefghij", L"abcde", 5);
66 test(L"abcdefghij", L"abcdefghij", 0);
67 test(L"abcdefghij", L"abcdefghijklmnopqrst", -10);
68 test(L"abcdefghijklmnopqrst", L"", 20);
69 test(L"abcdefghijklmnopqrst", L"abcde", 15);
70 test(L"abcdefghijklmnopqrst", L"abcdefghij", 10);
71 test(L"abcdefghijklmnopqrst", L"abcdefghijklmnopqrst", 0);
72
73 #if TEST_STD_VER >= 11
74 test(u"", u"", 0);
75 test(u"", u"abcde", -5);
76 test(u"", u"abcdefghij", -10);
77 test(u"", u"abcdefghijklmnopqrst", -20);
78 test(u"abcde", u"", 5);
79 test(u"abcde", u"abcde", 0);
80 test(u"abcde", u"abcdefghij", -5);
81 test(u"abcde", u"abcdefghijklmnopqrst", -15);
82 test(u"abcdefghij", u"", 10);
83 test(u"abcdefghij", u"abcde", 5);
84 test(u"abcdefghij", u"abcdefghij", 0);
85 test(u"abcdefghij", u"abcdefghijklmnopqrst", -10);
86 test(u"abcdefghijklmnopqrst", u"", 20);
87 test(u"abcdefghijklmnopqrst", u"abcde", 15);
88 test(u"abcdefghijklmnopqrst", u"abcdefghij", 10);
89 test(u"abcdefghijklmnopqrst", u"abcdefghijklmnopqrst", 0);
90
91 test(U"", U"", 0);
92 test(U"", U"abcde", -5);
93 test(U"", U"abcdefghij", -10);
94 test(U"", U"abcdefghijklmnopqrst", -20);
95 test(U"abcde", U"", 5);
96 test(U"abcde", U"abcde", 0);
97 test(U"abcde", U"abcdefghij", -5);
98 test(U"abcde", U"abcdefghijklmnopqrst", -15);
99 test(U"abcdefghij", U"", 10);
100 test(U"abcdefghij", U"abcde", 5);
101 test(U"abcdefghij", U"abcdefghij", 0);
102 test(U"abcdefghij", U"abcdefghijklmnopqrst", -10);
103 test(U"abcdefghijklmnopqrst", U"", 20);
104 test(U"abcdefghijklmnopqrst", U"abcde", 15);
105 test(U"abcdefghijklmnopqrst", U"abcdefghij", 10);
106 test(U"abcdefghijklmnopqrst", U"abcdefghijklmnopqrst", 0);
107 #endif
108
109 #if TEST_STD_VER > 11
110 {
111 typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
112 constexpr SV sv1 { "abcde", 5 };
113 constexpr SV sv2 { "abcde", 5 };
114 constexpr SV sv3 { "edcba0", 6 };
115 static_assert ( sv1.compare(sv2) == 0, "" );
116 static_assert ( sv2.compare(sv1) == 0, "" );
117 static_assert ( sv3.compare(sv2) > 0, "" );
118 static_assert ( sv2.compare(sv3) < 0, "" );
119 }
120 #endif
121
122 return 0;
123 }
124