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 // constexpr template<class charT, class traits, class Allocator>
13 // bool operator>(const charT* lhs, basic_string_wiew<charT,traits> rhs);
14 // constexpr template<class charT, class traits, class Allocator>
15 // 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
22 template <class S>
23 void
test(const typename S::value_type * lhs,const S & rhs,bool x,bool y)24 test(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
main()30 int main()
31 {
32 {
33 typedef std::experimental::string_view S;
34 test("", S(""), false, false);
35 test("", S("abcde"), false, true);
36 test("", S("abcdefghij"), false, true);
37 test("", S("abcdefghijklmnopqrst"), false, true);
38 test("abcde", S(""), true, false);
39 test("abcde", S("abcde"), false, false);
40 test("abcde", S("abcdefghij"), false, true);
41 test("abcde", S("abcdefghijklmnopqrst"), false, true);
42 test("abcdefghij", S(""), true, false);
43 test("abcdefghij", S("abcde"), true, false);
44 test("abcdefghij", S("abcdefghij"), false, false);
45 test("abcdefghij", S("abcdefghijklmnopqrst"), false, true);
46 test("abcdefghijklmnopqrst", S(""), true, false);
47 test("abcdefghijklmnopqrst", S("abcde"), true, false);
48 test("abcdefghijklmnopqrst", S("abcdefghij"), true, false);
49 test("abcdefghijklmnopqrst", S("abcdefghijklmnopqrst"), false, false);
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