1 // -*- C++ -*-
2 //===----------------------------------------------------------------------===//
3 //
4 // The LLVM Compiler Infrastructure
5 //
6 // This file is dual licensed under the MIT and the University of Illinois Open
7 // Source Licenses. See LICENSE.TXT for details.
8 //
9 //===----------------------------------------------------------------------===//
10
11 // UNSUPPORTED: c++98, c++03, c++11
12 // UNSUPPORTED: clang-3.3, clang-3.4, clang-3.5, clang-3.6, clang-3.7, clang-3.8, clang-3.9
13 // UNSUPPORTED: apple-clang-6, apple-clang-7, apple-clang-8
14 // Note: libc++ supports string_view before C++17, but literals were introduced in C++14
15
16 #include <string_view>
17 #include <cassert>
18
main()19 int main()
20 {
21 using namespace std::literals::string_view_literals;
22
23 static_assert ( std::is_same<decltype( "Hi"sv), std::string_view>::value, "" );
24 static_assert ( std::is_same<decltype( u8"Hi"sv), std::string_view>::value, "" );
25 static_assert ( std::is_same<decltype( L"Hi"sv), std::wstring_view>::value, "" );
26 static_assert ( std::is_same<decltype( u"Hi"sv), std::u16string_view>::value, "" );
27 static_assert ( std::is_same<decltype( U"Hi"sv), std::u32string_view>::value, "" );
28
29 std::string_view foo;
30 std::wstring_view Lfoo;
31 std::u16string_view ufoo;
32 std::u32string_view Ufoo;
33
34 foo = ""sv; assert( foo.size() == 0);
35 foo = u8""sv; assert( foo.size() == 0);
36 Lfoo = L""sv; assert(Lfoo.size() == 0);
37 ufoo = u""sv; assert(ufoo.size() == 0);
38 Ufoo = U""sv; assert(Ufoo.size() == 0);
39
40 foo = " "sv; assert( foo.size() == 1);
41 foo = u8" "sv; assert( foo.size() == 1);
42 Lfoo = L" "sv; assert(Lfoo.size() == 1);
43 ufoo = u" "sv; assert(ufoo.size() == 1);
44 Ufoo = U" "sv; assert(Ufoo.size() == 1);
45
46 foo = "ABC"sv; assert( foo == "ABC"); assert( foo == std::string_view ( "ABC"));
47 foo = u8"ABC"sv; assert( foo == u8"ABC"); assert( foo == std::string_view (u8"ABC"));
48 Lfoo = L"ABC"sv; assert(Lfoo == L"ABC"); assert(Lfoo == std::wstring_view ( L"ABC"));
49 ufoo = u"ABC"sv; assert(ufoo == u"ABC"); assert(ufoo == std::u16string_view( u"ABC"));
50 Ufoo = U"ABC"sv; assert(Ufoo == U"ABC"); assert(Ufoo == std::u32string_view( U"ABC"));
51
52 static_assert( "ABC"sv.size() == 3, "");
53 static_assert(u8"ABC"sv.size() == 3, "");
54 static_assert( L"ABC"sv.size() == 3, "");
55 static_assert( u"ABC"sv.size() == 3, "");
56 static_assert( U"ABC"sv.size() == 3, "");
57 }
58