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 // <string>
11
12 // template<class charT, class traits>
13 // constexpr bool operator<=(basic_string_view<charT,traits> lhs,
14 // basic_string_view<charT,traits> rhs);
15
16 #include <string_view>
17 #include <cassert>
18
19 #include "test_macros.h"
20 #include "constexpr_char_traits.hpp"
21
22 template <class S>
23 void
test(const S & lhs,const S & rhs,bool x,bool y)24 test(const S& lhs, const S& rhs, bool x, bool y)
25 {
26 assert((lhs <= rhs) == x);
27 assert((rhs <= lhs) == y);
28 }
29
main()30 int main()
31 {
32 {
33 typedef std::string_view S;
34 test(S(""), S(""), true, true);
35 test(S(""), S("abcde"), true, false);
36 test(S(""), S("abcdefghij"), true, false);
37 test(S(""), S("abcdefghijklmnopqrst"), true, false);
38 test(S("abcde"), S(""), false, true);
39 test(S("abcde"), S("abcde"), true, true);
40 test(S("abcde"), S("abcdefghij"), true, false);
41 test(S("abcde"), S("abcdefghijklmnopqrst"), true, false);
42 test(S("abcdefghij"), S(""), false, true);
43 test(S("abcdefghij"), S("abcde"), false, true);
44 test(S("abcdefghij"), S("abcdefghij"), true, true);
45 test(S("abcdefghij"), S("abcdefghijklmnopqrst"), true, false);
46 test(S("abcdefghijklmnopqrst"), S(""), false, true);
47 test(S("abcdefghijklmnopqrst"), S("abcde"), false, true);
48 test(S("abcdefghijklmnopqrst"), S("abcdefghij"), false, true);
49 test(S("abcdefghijklmnopqrst"), S("abcdefghijklmnopqrst"), true, true);
50 }
51
52 #if TEST_STD_VER > 11
53 {
54 typedef std::basic_string_view<char, constexpr_char_traits<char>> SV;
55 constexpr SV sv1;
56 constexpr SV sv2 { "abcde", 5 };
57
58 static_assert ( sv1 <= sv1, "" );
59 static_assert ( sv2 <= sv2, "" );
60
61 static_assert ( sv1 <= sv2, "" );
62 static_assert (!(sv2 <= sv1), "" );
63 }
64 #endif
65 }
66