1*e4b17023SJohn Marino // class template regex -*- C++ -*- 2*e4b17023SJohn Marino 3*e4b17023SJohn Marino // Copyright (C) 2010, 2011 Free Software Foundation, Inc. 4*e4b17023SJohn Marino // 5*e4b17023SJohn Marino // This file is part of the GNU ISO C++ Library. This library is free 6*e4b17023SJohn Marino // software; you can redistribute it and/or modify it under the 7*e4b17023SJohn Marino // terms of the GNU General Public License as published by the 8*e4b17023SJohn Marino // Free Software Foundation; either version 3, or (at your option) 9*e4b17023SJohn Marino // any later version. 10*e4b17023SJohn Marino 11*e4b17023SJohn Marino // This library is distributed in the hope that it will be useful, 12*e4b17023SJohn Marino // but WITHOUT ANY WARRANTY; without even the implied warranty of 13*e4b17023SJohn Marino // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14*e4b17023SJohn Marino // GNU General Public License for more details. 15*e4b17023SJohn Marino 16*e4b17023SJohn Marino // Under Section 7 of GPL version 3, you are granted additional 17*e4b17023SJohn Marino // permissions described in the GCC Runtime Library Exception, version 18*e4b17023SJohn Marino // 3.1, as published by the Free Software Foundation. 19*e4b17023SJohn Marino 20*e4b17023SJohn Marino // You should have received a copy of the GNU General Public License and 21*e4b17023SJohn Marino // a copy of the GCC Runtime Library Exception along with this program; 22*e4b17023SJohn Marino // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23*e4b17023SJohn Marino // <http://www.gnu.org/licenses/>. 24*e4b17023SJohn Marino 25*e4b17023SJohn Marino /** 26*e4b17023SJohn Marino * @file bits/regex_cursor.h 27*e4b17023SJohn Marino * This is an internal header file, included by other library headers. 28*e4b17023SJohn Marino * Do not attempt to use it directly. @headername{regex} 29*e4b17023SJohn Marino */ 30*e4b17023SJohn Marino 31*e4b17023SJohn Marino namespace std _GLIBCXX_VISIBILITY(default) 32*e4b17023SJohn Marino { 33*e4b17023SJohn Marino namespace __regex 34*e4b17023SJohn Marino { 35*e4b17023SJohn Marino _GLIBCXX_BEGIN_NAMESPACE_VERSION 36*e4b17023SJohn Marino 37*e4b17023SJohn Marino // ABC for pattern matching 38*e4b17023SJohn Marino struct _PatternCursor 39*e4b17023SJohn Marino { 40*e4b17023SJohn Marino virtual ~_PatternCursor() { }; 41*e4b17023SJohn Marino virtual void _M_next() = 0; 42*e4b17023SJohn Marino virtual bool _M_at_end() const = 0; 43*e4b17023SJohn Marino }; 44*e4b17023SJohn Marino 45*e4b17023SJohn Marino // Provides a cursor into the specific target string. 46*e4b17023SJohn Marino template<typename _FwdIterT> 47*e4b17023SJohn Marino class _SpecializedCursor 48*e4b17023SJohn Marino : public _PatternCursor 49*e4b17023SJohn Marino { 50*e4b17023SJohn Marino public: 51*e4b17023SJohn Marino _SpecializedCursor(const _FwdIterT& __b, const _FwdIterT __e) 52*e4b17023SJohn Marino : _M_b(__b), _M_c(__b), _M_e(__e) 53*e4b17023SJohn Marino { } 54*e4b17023SJohn Marino 55*e4b17023SJohn Marino typename std::iterator_traits<_FwdIterT>::value_type 56*e4b17023SJohn Marino _M_current() const 57*e4b17023SJohn Marino { return *_M_c; } 58*e4b17023SJohn Marino 59*e4b17023SJohn Marino void 60*e4b17023SJohn Marino _M_next() 61*e4b17023SJohn Marino { ++_M_c; } 62*e4b17023SJohn Marino 63*e4b17023SJohn Marino _FwdIterT 64*e4b17023SJohn Marino _M_pos() const 65*e4b17023SJohn Marino { return _M_c; } 66*e4b17023SJohn Marino 67*e4b17023SJohn Marino const _FwdIterT& 68*e4b17023SJohn Marino _M_begin() const 69*e4b17023SJohn Marino { return _M_b; } 70*e4b17023SJohn Marino 71*e4b17023SJohn Marino const _FwdIterT& 72*e4b17023SJohn Marino _M_end() const 73*e4b17023SJohn Marino { return _M_e; } 74*e4b17023SJohn Marino 75*e4b17023SJohn Marino bool 76*e4b17023SJohn Marino _M_at_end() const 77*e4b17023SJohn Marino { return _M_c == _M_e; } 78*e4b17023SJohn Marino 79*e4b17023SJohn Marino private: 80*e4b17023SJohn Marino _FwdIterT _M_b; 81*e4b17023SJohn Marino _FwdIterT _M_c; 82*e4b17023SJohn Marino _FwdIterT _M_e; 83*e4b17023SJohn Marino }; 84*e4b17023SJohn Marino 85*e4b17023SJohn Marino // Helper function to create a cursor specialized for an iterator class. 86*e4b17023SJohn Marino template<typename _FwdIterT> 87*e4b17023SJohn Marino inline _SpecializedCursor<_FwdIterT> 88*e4b17023SJohn Marino __cursor(const _FwdIterT& __b, const _FwdIterT __e) 89*e4b17023SJohn Marino { return _SpecializedCursor<_FwdIterT>(__b, __e); } 90*e4b17023SJohn Marino 91*e4b17023SJohn Marino _GLIBCXX_END_NAMESPACE_VERSION 92*e4b17023SJohn Marino } // namespace __regex 93*e4b17023SJohn Marino } // namespace 94