1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11, c++14, c++17
// <string>
// template<> struct char_traits<char8_t>
// static constexpr const char_type* find(const char_type* s, size_t n, const char_type& a);
#include <string>
#include <cassert>
#include "test_macros.h"
#if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
constexpr bool test_constexpr()
{
constexpr const char8_t *p = u8"123";
return std::char_traits<char8_t>::find(p, 3, u8'1') == p
&& std::char_traits<char8_t>::find(p, 3, u8'2') == p + 1
&& std::char_traits<char8_t>::find(p, 3, u8'3') == p + 2
&& std::char_traits<char8_t>::find(p, 3, u8'4') == nullptr;
}
int main(int, char**)
{
char8_t s1[] = {1, 2, 3};
assert(std::char_traits<char8_t>::find(s1, 3, char8_t(1)) == s1);
assert(std::char_traits<char8_t>::find(s1, 3, char8_t(2)) == s1+1);
assert(std::char_traits<char8_t>::find(s1, 3, char8_t(3)) == s1+2);
assert(std::char_traits<char8_t>::find(s1, 3, char8_t(4)) == 0);
assert(std::char_traits<char8_t>::find(s1, 3, char8_t(0)) == 0);
assert(std::char_traits<char8_t>::find(NULL, 0, char8_t(0)) == 0);
static_assert(test_constexpr(), "" );
return 0;
}
#else
int main(int, char**) {
return 0;
}
#endif