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(basic_string_view str) const noexcept;
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,std::basic_string_view<CharT> sv2,int expected)24 void test1(std::basic_string_view<CharT> sv1, std::basic_string_view<CharT> sv2, int expected) {
25 assert(sign(sv1.compare(sv2)) == 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
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 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 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
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 #endif
73
74 #if TEST_STD_VER >= 11
75 test(u"", u"", 0);
76 test(u"", u"abcde", -5);
77 test(u"", u"abcdefghij", -10);
78 test(u"", u"abcdefghijklmnopqrst", -20);
79 test(u"abcde", u"", 5);
80 test(u"abcde", u"abcde", 0);
81 test(u"abcde", u"abcdefghij", -5);
82 test(u"abcde", u"abcdefghijklmnopqrst", -15);
83 test(u"abcdefghij", u"", 10);
84 test(u"abcdefghij", u"abcde", 5);
85 test(u"abcdefghij", u"abcdefghij", 0);
86 test(u"abcdefghij", u"abcdefghijklmnopqrst", -10);
87 test(u"abcdefghijklmnopqrst", u"", 20);
88 test(u"abcdefghijklmnopqrst", u"abcde", 15);
89 test(u"abcdefghijklmnopqrst", u"abcdefghij", 10);
90 test(u"abcdefghijklmnopqrst", u"abcdefghijklmnopqrst", 0);
91
92 test(U"", U"", 0);
93 test(U"", U"abcde", -5);
94 test(U"", U"abcdefghij", -10);
95 test(U"", U"abcdefghijklmnopqrst", -20);
96 test(U"abcde", U"", 5);
97 test(U"abcde", U"abcde", 0);
98 test(U"abcde", U"abcdefghij", -5);
99 test(U"abcde", U"abcdefghijklmnopqrst", -15);
100 test(U"abcdefghij", U"", 10);
101 test(U"abcdefghij", U"abcde", 5);
102 test(U"abcdefghij", U"abcdefghij", 0);
103 test(U"abcdefghij", U"abcdefghijklmnopqrst", -10);
104 test(U"abcdefghijklmnopqrst", U"", 20);
105 test(U"abcdefghijklmnopqrst", U"abcde", 15);
106 test(U"abcdefghijklmnopqrst", U"abcdefghij", 10);
107 test(U"abcdefghijklmnopqrst", U"abcdefghijklmnopqrst", 0);
108 #endif
109
110 #if TEST_STD_VER > 11
111 {
112 typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
113 constexpr SV sv1{"abcde", 5};
114 constexpr SV sv2{"abcde", 5};
115 constexpr SV sv3{"edcba0", 6};
116 static_assert(sv1.compare(sv2) == 0, "");
117 static_assert(sv2.compare(sv1) == 0, "");
118 static_assert(sv3.compare(sv2) > 0, "");
119 static_assert(sv2.compare(sv3) < 0, "");
120 }
121 #endif
122
123 return 0;
124 }
125