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
11 // <string_view>
12
13 // constexpr basic_string_view& operator=(const basic_string_view &) noexcept = default;
14
15 #include <string_view>
16 #include <cassert>
17
18 #include "test_macros.h"
19
20 template<typename T>
21 #if TEST_STD_VER > 11
22 constexpr
23 #endif
test(T sv0)24 bool test (T sv0)
25 {
26 T sv1;
27 sv1 = sv0;
28 // We can't just say "sv0 == sv1" here because string_view::compare
29 // isn't constexpr until C++17, and we want to support back to C++14
30 return sv0.size() == sv1.size() && sv0.data() == sv1.data();
31 }
32
main()33 int main () {
34
35 assert( test<std::string_view> ( "1234"));
36 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
37 assert( test<std::u8string_view> (u8"1234"));
38 #endif
39 #if TEST_STD_VER >= 11
40 #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
41 assert( test<std::u16string_view> ( u"1234"));
42 assert( test<std::u32string_view> ( U"1234"));
43 #endif
44 #endif
45 assert( test<std::wstring_view> ( L"1234"));
46
47 #if TEST_STD_VER > 11
48 static_assert( test<std::string_view> ({ "abc", 3}), "");
49 #if defined(__cpp_lib_char8_t) && __cpp_lib_char8_t >= 201811L
50 static_assert( test<std::u8string_view> ({u8"abc", 3}), "");
51 #endif
52 #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
53 static_assert( test<std::u16string_view> ({ u"abc", 3}), "");
54 static_assert( test<std::u32string_view> ({ U"abc", 3}), "");
55 #endif
56 static_assert( test<std::wstring_view> ({ L"abc", 3}), "");
57 #endif
58 }
59