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 // template<class Allocator>
14 // basic_string_view(const basic_string<_CharT, _Traits, Allocator>& _str) noexcept
15 
16 
17 #include <string_view>
18 #include <string>
19 #include <cassert>
20 
21 #include "test_macros.h"
22 
23 struct dummy_char_traits : public std::char_traits<char> {};
24 
25 template<typename CharT, typename Traits>
26 void test ( const std::basic_string<CharT, Traits> &str ) {
27     typedef std::basic_string_view<CharT, Traits> SV;
28     ASSERT_NOEXCEPT(SV(str));
29 
30     SV sv1 ( str );
31     assert ( sv1.size() == str.size());
32     assert ( sv1.data() == str.data());
33 }
34 
35 int main () {
36 
37     test ( std::string("QBCDE") );
38     test ( std::string("") );
39     test ( std::string() );
40 
41     test ( std::wstring(L"QBCDE") );
42     test ( std::wstring(L"") );
43     test ( std::wstring() );
44 
45 #if TEST_STD_VER >= 11
46     test ( std::u16string{u"QBCDE"} );
47     test ( std::u16string{u""} );
48     test ( std::u16string{} );
49 
50     test ( std::u32string{U"QBCDE"} );
51     test ( std::u32string{U""} );
52     test ( std::u32string{} );
53 #endif
54 
55     test ( std::basic_string<char, dummy_char_traits>("QBCDE") );
56     test ( std::basic_string<char, dummy_char_traits>("") );
57     test ( std::basic_string<char, dummy_char_traits>() );
58 
59 }
60