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 // UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
10
11 // <string>
12
13 // template<> struct char_traits<char8_t>
14
15 // static constexpr const char_type* find(const char_type* s, size_t n, const char_type& a);
16
17 #include <string>
18 #include <cassert>
19
20 #include "test_macros.h"
21
22 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
test_constexpr()23 constexpr bool test_constexpr()
24 {
25 constexpr const char8_t *p = u8"123";
26 return std::char_traits<char8_t>::find(p, 3, u8'1') == p
27 && std::char_traits<char8_t>::find(p, 3, u8'2') == p + 1
28 && std::char_traits<char8_t>::find(p, 3, u8'3') == p + 2
29 && std::char_traits<char8_t>::find(p, 3, u8'4') == nullptr;
30 }
31
main()32 int main()
33 {
34 char8_t s1[] = {1, 2, 3};
35 assert(std::char_traits<char8_t>::find(s1, 3, char8_t(1)) == s1);
36 assert(std::char_traits<char8_t>::find(s1, 3, char8_t(2)) == s1+1);
37 assert(std::char_traits<char8_t>::find(s1, 3, char8_t(3)) == s1+2);
38 assert(std::char_traits<char8_t>::find(s1, 3, char8_t(4)) == 0);
39 assert(std::char_traits<char8_t>::find(s1, 3, char8_t(0)) == 0);
40 assert(std::char_traits<char8_t>::find(NULL, 0, char8_t(0)) == 0);
41
42 static_assert(test_constexpr(), "" );
43 }
44 #else
main()45 int main () {}
46 #endif
47