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, class Allocator>
13//   constexpr bool operator<=(const charT* lhs, basic_string_wiew<charT,traits> rhs);
14// template<class charT, class traits, class Allocator>
15//   constexpr bool operator<=(basic_string_wiew<charT,traits> lhs, const charT* rhs);
16
17#include <experimental/string_view>
18#include <cassert>
19
20#include "constexpr_char_traits.hpp"
21
22template <class S>
23void
24test(const typename S::value_type* lhs, const S& rhs, bool x, bool y)
25{
26    assert((lhs <= rhs) == x);
27    assert((rhs <= lhs) == y);
28}
29
30int main()
31{
32    {
33    typedef std::experimental::string_view S;
34    test("", S(""), true, true);
35    test("", S("abcde"), true, false);
36    test("", S("abcdefghij"), true, false);
37    test("", S("abcdefghijklmnopqrst"), true, false);
38    test("abcde", S(""), false, true);
39    test("abcde", S("abcde"), true, true);
40    test("abcde", S("abcdefghij"), true, false);
41    test("abcde", S("abcdefghijklmnopqrst"), true, false);
42    test("abcdefghij", S(""), false, true);
43    test("abcdefghij", S("abcde"), false, true);
44    test("abcdefghij", S("abcdefghij"), true, true);
45    test("abcdefghij", S("abcdefghijklmnopqrst"), true, false);
46    test("abcdefghijklmnopqrst", S(""), false, true);
47    test("abcdefghijklmnopqrst", S("abcde"), false, true);
48    test("abcdefghijklmnopqrst", S("abcdefghij"), false, true);
49    test("abcdefghijklmnopqrst", S("abcdefghijklmnopqrst"), true, true);
50    }
51
52#if _LIBCPP_STD_VER > 11
53    {
54    typedef std::experimental::basic_string_view<char, constexpr_char_traits<char>> SV;
55    constexpr SV  sv1;
56    constexpr SV  sv2 { "abcde", 5 };
57
58    static_assert (  sv1     <= "", "" );
59    static_assert (  ""      <= sv1, "" );
60    static_assert (  sv1     <= "abcde", "" );
61    static_assert (!("abcde" <= sv1), "" );
62
63    static_assert (!(sv2      <= ""), "" );
64    static_assert (  ""       <= sv2, "" );
65    static_assert (  sv2      <= "abcde", "" );
66    static_assert (  "abcde"  <= sv2, "" );
67    static_assert (  sv2      <= "abcde0", "" );
68    static_assert (!("abcde0" <= sv2), "" );
69    }
70#endif
71}
72