1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 // UNSUPPORTED: c++03, c++11, c++14, c++17
9
10 // <string>
11
12 // template<> struct char_traits<char8_t>
13
14 // static constexpr const char_type* find(const char_type* s, size_t n, const char_type& a);
15
16 #include <string>
17 #include <cassert>
18
19 #include "test_macros.h"
20
21 #ifndef TEST_HAS_NO_CHAR8_T
test_constexpr()22 constexpr bool test_constexpr() {
23 constexpr const char8_t* p = u8"123";
24 return std::char_traits<char8_t>::find(p, 3, u8'1') == p && std::char_traits<char8_t>::find(p, 3, u8'2') == p + 1 &&
25 std::char_traits<char8_t>::find(p, 3, u8'3') == p + 2 &&
26 std::char_traits<char8_t>::find(p, 3, u8'4') == nullptr;
27 }
28
main(int,char **)29 int main(int, char**) {
30 char8_t s1[] = {1, 2, 3};
31 assert(std::char_traits<char8_t>::find(s1, 3, char8_t(1)) == s1);
32 assert(std::char_traits<char8_t>::find(s1, 3, char8_t(2)) == s1 + 1);
33 assert(std::char_traits<char8_t>::find(s1, 3, char8_t(3)) == s1 + 2);
34 assert(std::char_traits<char8_t>::find(s1, 3, char8_t(4)) == 0);
35 assert(std::char_traits<char8_t>::find(s1, 3, char8_t(0)) == 0);
36 assert(std::char_traits<char8_t>::find(NULL, 0, char8_t(0)) == 0);
37
38 static_assert(test_constexpr(), "");
39 return 0;
40 }
41 #else
main(int,char **)42 int main(int, char**) { return 0; }
43 #endif
44