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>
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 string_view_t sv1(s1);
32 test1(sv1, s2, expected);
33 }
34
main(int,char **)35 int main(int, char**) {
36 {
37 test("", "", 0);
38 test("", "abcde", -5);
39 test("", "abcdefghij", -10);
40 test("", "abcdefghijklmnopqrst", -20);
41 test("abcde", "", 5);
42 test("abcde", "abcde", 0);
43 test("abcde", "abcdefghij", -5);
44 test("abcde", "abcdefghijklmnopqrst", -15);
45 test("abcdefghij", "", 10);
46 test("abcdefghij", "abcde", 5);
47 test("abcdefghij", "abcdefghij", 0);
48 test("abcdefghij", "abcdefghijklmnopqrst", -10);
49 test("abcdefghijklmnopqrst", "", 20);
50 test("abcdefghijklmnopqrst", "abcde", 15);
51 test("abcdefghijklmnopqrst", "abcdefghij", 10);
52 test("abcdefghijklmnopqrst", "abcdefghijklmnopqrst", 0);
53 }
54
55 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
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 #endif
75
76 #if TEST_STD_VER >= 11
77 {
78 test(U"", U"", 0);
79 test(U"", U"abcde", -5);
80 test(U"", U"abcdefghij", -10);
81 test(U"", U"abcdefghijklmnopqrst", -20);
82 test(U"abcde", U"", 5);
83 test(U"abcde", U"abcde", 0);
84 test(U"abcde", U"abcdefghij", -5);
85 test(U"abcde", U"abcdefghijklmnopqrst", -15);
86 test(U"abcdefghij", U"", 10);
87 test(U"abcdefghij", U"abcde", 5);
88 test(U"abcdefghij", U"abcdefghij", 0);
89 test(U"abcdefghij", U"abcdefghijklmnopqrst", -10);
90 test(U"abcdefghijklmnopqrst", U"", 20);
91 test(U"abcdefghijklmnopqrst", U"abcde", 15);
92 test(U"abcdefghijklmnopqrst", U"abcdefghij", 10);
93 test(U"abcdefghijklmnopqrst", U"abcdefghijklmnopqrst", 0);
94 }
95
96 {
97 test(u"", u"", 0);
98 test(u"", u"abcde", -5);
99 test(u"", u"abcdefghij", -10);
100 test(u"", u"abcdefghijklmnopqrst", -20);
101 test(u"abcde", u"", 5);
102 test(u"abcde", u"abcde", 0);
103 test(u"abcde", u"abcdefghij", -5);
104 test(u"abcde", u"abcdefghijklmnopqrst", -15);
105 test(u"abcdefghij", u"", 10);
106 test(u"abcdefghij", u"abcde", 5);
107 test(u"abcdefghij", u"abcdefghij", 0);
108 test(u"abcdefghij", u"abcdefghijklmnopqrst", -10);
109 test(u"abcdefghijklmnopqrst", u"", 20);
110 test(u"abcdefghijklmnopqrst", u"abcde", 15);
111 test(u"abcdefghijklmnopqrst", u"abcdefghij", 10);
112 test(u"abcdefghijklmnopqrst", u"abcdefghijklmnopqrst", 0);
113 }
114 #endif
115
116 #if TEST_STD_VER > 11
117 {
118 typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
119 constexpr SV sv1;
120 constexpr SV sv2{"abcde", 5};
121 static_assert(sv1.compare("") == 0, "");
122 static_assert(sv1.compare("abcde") < 0, "");
123 static_assert(sv2.compare("") > 0, "");
124 static_assert(sv2.compare("abcde") == 0, "");
125 }
126 #endif
127
128 return 0;
129 }
130