1 // -*- C++ -*-
2 //===---------------------------------------------------------------------===//
3 //
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //
8 //===---------------------------------------------------------------------===//
9 
10 #ifndef _LIBCPP___FWD_STRING_VIEW_H
11 #define _LIBCPP___FWD_STRING_VIEW_H
12 
13 #include <__config>
14 #include <__fwd/string.h>
15 
16 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
17 #  pragma GCC system_header
18 #endif
19 
20 _LIBCPP_BEGIN_NAMESPACE_STD
21 
22 template <class _CharT, class _Traits = char_traits<_CharT> >
23 class _LIBCPP_TEMPLATE_VIS basic_string_view;
24 
25 typedef basic_string_view<char> string_view;
26 #ifndef _LIBCPP_HAS_NO_CHAR8_T
27 typedef basic_string_view<char8_t> u8string_view;
28 #endif
29 typedef basic_string_view<char16_t> u16string_view;
30 typedef basic_string_view<char32_t> u32string_view;
31 #ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
32 typedef basic_string_view<wchar_t> wstring_view;
33 #endif
34 
35 // clang-format off
36 template <class _CharT, class _Traits>
37 class _LIBCPP_PREFERRED_NAME(string_view)
38 #ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
39       _LIBCPP_PREFERRED_NAME(wstring_view)
40 #endif
41 #ifndef _LIBCPP_HAS_NO_CHAR8_T
42       _LIBCPP_PREFERRED_NAME(u8string_view)
43 #endif
44       _LIBCPP_PREFERRED_NAME(u16string_view)
45       _LIBCPP_PREFERRED_NAME(u32string_view)
46       basic_string_view;
47 // clang-format on
48 _LIBCPP_END_NAMESPACE_STD
49 
50 #endif // _LIBCPP___FWD_STRING_VIEW_H
51