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 // template<> struct char_traits<char32_t>
13
14 // static const char_type* find(const char_type* s, size_t n, const char_type& a);
15 // constexpr in C++17
16
17 #include <string>
18 #include <cassert>
19
20 #include "test_macros.h"
21
22 #if TEST_STD_VER > 14
test_constexpr()23 constexpr bool test_constexpr()
24 {
25 constexpr const char32_t *p = U"123";
26 return std::char_traits<char32_t>::find(p, 3, U'1') == p
27 && std::char_traits<char32_t>::find(p, 3, U'2') == p + 1
28 && std::char_traits<char32_t>::find(p, 3, U'3') == p + 2
29 && std::char_traits<char32_t>::find(p, 3, U'4') == nullptr;
30 }
31 #endif
32
main()33 int main()
34 {
35 #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
36 char32_t s1[] = {1, 2, 3};
37 assert(std::char_traits<char32_t>::find(s1, 3, char32_t(1)) == s1);
38 assert(std::char_traits<char32_t>::find(s1, 3, char32_t(2)) == s1+1);
39 assert(std::char_traits<char32_t>::find(s1, 3, char32_t(3)) == s1+2);
40 assert(std::char_traits<char32_t>::find(s1, 3, char32_t(4)) == 0);
41 assert(std::char_traits<char32_t>::find(s1, 3, char32_t(0)) == 0);
42 assert(std::char_traits<char32_t>::find(NULL, 0, char32_t(0)) == 0);
43
44 #if TEST_STD_VER > 14
45 static_assert(test_constexpr(), "" );
46 #endif
47 #endif // _LIBCPP_HAS_NO_UNICODE_CHARS
48 }
49