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
21int sign(int x) { return x > 0 ? 1 : (x < 0 ? -1 : 0); }
22
23template <typename CharT>
24void test1(std::basic_string_view<CharT> sv1, const CharT* s, int expected) {
25 assert(sign(sv1.compare(s)) == sign(expected));
26}
27
28template <typename CharT>
29void 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
35int main(int, char**) {
36 {
37 test(s1: "", s2: "", expected: 0);
38 test(s1: "", s2: "abcde", expected: -5);
39 test(s1: "", s2: "abcdefghij", expected: -10);
40 test(s1: "", s2: "abcdefghijklmnopqrst", expected: -20);
41 test(s1: "abcde", s2: "", expected: 5);
42 test(s1: "abcde", s2: "abcde", expected: 0);
43 test(s1: "abcde", s2: "abcdefghij", expected: -5);
44 test(s1: "abcde", s2: "abcdefghijklmnopqrst", expected: -15);
45 test(s1: "abcdefghij", s2: "", expected: 10);
46 test(s1: "abcdefghij", s2: "abcde", expected: 5);
47 test(s1: "abcdefghij", s2: "abcdefghij", expected: 0);
48 test(s1: "abcdefghij", s2: "abcdefghijklmnopqrst", expected: -10);
49 test(s1: "abcdefghijklmnopqrst", s2: "", expected: 20);
50 test(s1: "abcdefghijklmnopqrst", s2: "abcde", expected: 15);
51 test(s1: "abcdefghijklmnopqrst", s2: "abcdefghij", expected: 10);
52 test(s1: "abcdefghijklmnopqrst", s2: "abcdefghijklmnopqrst", expected: 0);
53 }
54
55#ifndef TEST_HAS_NO_WIDE_CHARACTERS
56 {
57 test(s1: L"", s2: L"", expected: 0);
58 test(s1: L"", s2: L"abcde", expected: -5);
59 test(s1: L"", s2: L"abcdefghij", expected: -10);
60 test(s1: L"", s2: L"abcdefghijklmnopqrst", expected: -20);
61 test(s1: L"abcde", s2: L"", expected: 5);
62 test(s1: L"abcde", s2: L"abcde", expected: 0);
63 test(s1: L"abcde", s2: L"abcdefghij", expected: -5);
64 test(s1: L"abcde", s2: L"abcdefghijklmnopqrst", expected: -15);
65 test(s1: L"abcdefghij", s2: L"", expected: 10);
66 test(s1: L"abcdefghij", s2: L"abcde", expected: 5);
67 test(s1: L"abcdefghij", s2: L"abcdefghij", expected: 0);
68 test(s1: L"abcdefghij", s2: L"abcdefghijklmnopqrst", expected: -10);
69 test(s1: L"abcdefghijklmnopqrst", s2: L"", expected: 20);
70 test(s1: L"abcdefghijklmnopqrst", s2: L"abcde", expected: 15);
71 test(s1: L"abcdefghijklmnopqrst", s2: L"abcdefghij", expected: 10);
72 test(s1: L"abcdefghijklmnopqrst", s2: L"abcdefghijklmnopqrst", expected: 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

source code of libcxx/test/std/strings/string.view/string.view.ops/compare.pointer.pass.cpp