1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10
11 // <string_view>
12 // constexpr int compare(basic_string_view str) const noexcept;
13
14 #include <string_view>
15 #include <cassert>
16
17 #include "test_macros.h"
18 #include "constexpr_char_traits.hpp"
19
sign(int x)20 int sign ( int x ) { return x > 0 ? 1 : ( x < 0 ? -1 : 0 ); }
21
22 template<typename CharT>
test1(std::basic_string_view<CharT> sv1,std::basic_string_view<CharT> sv2,int expected)23 void test1 ( std::basic_string_view<CharT> sv1,
24 std::basic_string_view<CharT> sv2, int expected ) {
25 assert ( sign( sv1.compare(sv2)) == sign(expected));
26 }
27
28
29 template<typename CharT>
test(const CharT * s1,const CharT * s2,int expected)30 void test ( const CharT *s1, const CharT *s2, int expected ) {
31 typedef std::basic_string_view<CharT> string_view_t;
32
33 string_view_t sv1 ( s1 );
34 string_view_t sv2 ( s2 );
35 test1(sv1, sv2, expected);
36 }
37
main()38 int main () {
39
40 test("", "", 0);
41 test("", "abcde", -5);
42 test("", "abcdefghij", -10);
43 test("", "abcdefghijklmnopqrst", -20);
44 test("abcde", "", 5);
45 test("abcde", "abcde", 0);
46 test("abcde", "abcdefghij", -5);
47 test("abcde", "abcdefghijklmnopqrst", -15);
48 test("abcdefghij", "", 10);
49 test("abcdefghij", "abcde", 5);
50 test("abcdefghij", "abcdefghij", 0);
51 test("abcdefghij", "abcdefghijklmnopqrst", -10);
52 test("abcdefghijklmnopqrst", "", 20);
53 test("abcdefghijklmnopqrst", "abcde", 15);
54 test("abcdefghijklmnopqrst", "abcdefghij", 10);
55 test("abcdefghijklmnopqrst", "abcdefghijklmnopqrst", 0);
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 #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