libcxx/include/__fwd/string_view.h

   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