92 lines
2.5 KiB
C++
92 lines
2.5 KiB
C++
// class template regex -*- C++ -*-
|
|
|
|
// Copyright (C) 2010 Free Software Foundation, Inc.
|
|
//
|
|
// This file is part of the GNU ISO C++ Library. This library is free
|
|
// software; you can redistribute it and/or modify it under the
|
|
// terms of the GNU General Public License as published by the
|
|
// Free Software Foundation; either version 3, or (at your option)
|
|
// any later version.
|
|
|
|
// This library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
|
|
// Under Section 7 of GPL version 3, you are granted additional
|
|
// permissions described in the GCC Runtime Library Exception, version
|
|
// 3.1, as published by the Free Software Foundation.
|
|
|
|
// You should have received a copy of the GNU General Public License and
|
|
// a copy of the GCC Runtime Library Exception along with this program;
|
|
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
// <http://www.gnu.org/licenses/>.
|
|
|
|
/**
|
|
* @file bits/regex_cursor.h
|
|
* This is an internal header file, included by other library headers.
|
|
* Do not attempt to use it directly. @headername{regex}
|
|
*/
|
|
|
|
_GLIBCXX_BEGIN_NAMESPACE(std)
|
|
|
|
namespace __regex
|
|
{
|
|
// ABC for pattern matching
|
|
struct _PatternCursor
|
|
{
|
|
virtual ~_PatternCursor() { };
|
|
virtual void _M_next() = 0;
|
|
virtual bool _M_at_end() const = 0;
|
|
};
|
|
|
|
// Provides a cursor into the specific target string.
|
|
template<typename _FwdIterT>
|
|
class _SpecializedCursor
|
|
: public _PatternCursor
|
|
{
|
|
public:
|
|
_SpecializedCursor(const _FwdIterT& __b, const _FwdIterT __e)
|
|
: _M_b(__b), _M_c(__b), _M_e(__e)
|
|
{ }
|
|
|
|
typename std::iterator_traits<_FwdIterT>::value_type
|
|
_M_current() const
|
|
{ return *_M_c; }
|
|
|
|
void
|
|
_M_next()
|
|
{ ++_M_c; }
|
|
|
|
_FwdIterT
|
|
_M_pos() const
|
|
{ return _M_c; }
|
|
|
|
const _FwdIterT&
|
|
_M_begin() const
|
|
{ return _M_b; }
|
|
|
|
const _FwdIterT&
|
|
_M_end() const
|
|
{ return _M_e; }
|
|
|
|
bool
|
|
_M_at_end() const
|
|
{ return _M_c == _M_e; }
|
|
|
|
private:
|
|
_FwdIterT _M_b;
|
|
_FwdIterT _M_c;
|
|
_FwdIterT _M_e;
|
|
};
|
|
|
|
// Helper funxtion to create a cursor specialized for an iterator class.
|
|
template<typename _FwdIterT>
|
|
inline _SpecializedCursor<_FwdIterT>
|
|
__cursor(const _FwdIterT& __b, const _FwdIterT __e)
|
|
{ return _SpecializedCursor<_FwdIterT>(__b, __e); }
|
|
|
|
} // namespace __regex
|
|
|
|
_GLIBCXX_END_NAMESPACE
|