// tokeniser_state.hpp | |
// Copyright (c) 2007-2009 Ben Hanson (http://www.benhanson.net/) | |
// | |
// Distributed under the Boost Software License, Version 1.0. (See accompanying | |
// file licence_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
#ifndef BOOST_LEXER_RE_TOKENISER_STATE_HPP | |
#define BOOST_LEXER_RE_TOKENISER_STATE_HPP | |
#include "../../consts.hpp" | |
#include <locale> | |
#include "../../size_t.hpp" | |
#include <stack> | |
namespace boost | |
{ | |
namespace lexer | |
{ | |
namespace detail | |
{ | |
template<typename CharT> | |
struct basic_re_tokeniser_state | |
{ | |
const CharT * const _start; | |
const CharT * const _end; | |
const CharT *_curr; | |
regex_flags _flags; | |
std::stack<regex_flags> _flags_stack; | |
std::locale _locale; | |
long _paren_count; | |
bool _in_string; | |
bool _seen_BOL_assertion; | |
bool _seen_EOL_assertion; | |
basic_re_tokeniser_state (const CharT *start_, const CharT * const end_, | |
const regex_flags flags_, const std::locale locale_) : | |
_start (start_), | |
_end (end_), | |
_curr (start_), | |
_flags (flags_), | |
_locale (locale_), | |
_paren_count (0), | |
_in_string (false), | |
_seen_BOL_assertion (false), | |
_seen_EOL_assertion (false) | |
{ | |
} | |
// prevent VC++ 7.1 warning: | |
const basic_re_tokeniser_state &operator = | |
(const basic_re_tokeniser_state &rhs_) | |
{ | |
_start = rhs_._start; | |
_end = rhs_._end; | |
_curr = rhs_._curr; | |
_flags = rhs_._flags; | |
_locale = rhs_._locale; | |
_paren_count = rhs_._paren_count; | |
_in_string = rhs_._in_string; | |
_seen_BOL_assertion = rhs_._seen_BOL_assertion; | |
_seen_EOL_assertion = rhs_._seen_EOL_assertion; | |
return this; | |
} | |
inline bool next (CharT &ch_) | |
{ | |
if (_curr >= _end) | |
{ | |
ch_ = 0; | |
return true; | |
} | |
else | |
{ | |
ch_ = *_curr; | |
increment (); | |
return false; | |
} | |
} | |
inline void increment () | |
{ | |
++_curr; | |
} | |
inline std::size_t index () | |
{ | |
return _curr - _start; | |
} | |
inline bool eos () | |
{ | |
return _curr >= _end; | |
} | |
}; | |
} | |
} | |
} | |
#endif |