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
9 // <string>
10
11 // template<> struct char_traits<char16_t>
12
13 // static const char_type* find(const char_type* s, size_t n, const char_type& a);
14 // constexpr in C++17
15
16 #include <string>
17 #include <cassert>
18
19 #include "test_macros.h"
20
21 #if TEST_STD_VER > 14
test_constexpr()22 constexpr bool test_constexpr()
23 {
24 constexpr const char16_t *p = u"123";
25 return std::char_traits<char16_t>::find(p, 3, u'1') == p
26 && std::char_traits<char16_t>::find(p, 3, u'2') == p + 1
27 && std::char_traits<char16_t>::find(p, 3, u'3') == p + 2
28 && std::char_traits<char16_t>::find(p, 3, u'4') == nullptr;
29 }
30 #endif
31
main(int,char **)32 int main(int, char**)
33 {
34 #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
35 char16_t s1[] = {1, 2, 3};
36 assert(std::char_traits<char16_t>::find(s1, 3, char16_t(1)) == s1);
37 assert(std::char_traits<char16_t>::find(s1, 3, char16_t(2)) == s1+1);
38 assert(std::char_traits<char16_t>::find(s1, 3, char16_t(3)) == s1+2);
39 assert(std::char_traits<char16_t>::find(s1, 3, char16_t(4)) == 0);
40 assert(std::char_traits<char16_t>::find(s1, 3, char16_t(0)) == 0);
41 assert(std::char_traits<char16_t>::find(NULL, 0, char16_t(0)) == 0);
42
43 #if TEST_STD_VER > 14
44 static_assert(test_constexpr(), "" );
45 #endif
46 #endif // _LIBCPP_HAS_NO_UNICODE_CHARS
47
48 return 0;
49 }
50