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notepad-plus-plus/boostregex/boost/regex/v5/regex_token_iterator.hpp

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/*
*
* Copyright (c) 2003
* John Maddock
*
* Use, modification and distribution are subject to the
* Boost Software License, Version 1.0. (See accompanying file
* LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
*
*/
/*
* LOCATION: see http://www.boost.org for most recent version.
* FILE regex_token_iterator.hpp
* VERSION see <boost/version.hpp>
* DESCRIPTION: Provides regex_token_iterator implementation.
*/
#ifndef BOOST_REGEX_V5_REGEX_TOKEN_ITERATOR_HPP
#define BOOST_REGEX_V5_REGEX_TOKEN_ITERATOR_HPP
#include <memory>
namespace boost{
template <class BidirectionalIterator,
class charT,
class traits>
class regex_token_iterator_implementation
{
typedef basic_regex<charT, traits> regex_type;
typedef sub_match<BidirectionalIterator> value_type;
match_results<BidirectionalIterator> what; // current match
BidirectionalIterator base; // start of search area
BidirectionalIterator end; // end of search area
const regex_type re; // the expression
match_flag_type flags; // match flags
value_type result; // the current string result
int N; // the current sub-expression being enumerated
std::vector<int> subs; // the sub-expressions to enumerate
public:
regex_token_iterator_implementation(const regex_type* p, BidirectionalIterator last, int sub, match_flag_type f)
: end(last), re(*p), flags(f), N(0){ subs.push_back(sub); }
regex_token_iterator_implementation(const regex_type* p, BidirectionalIterator last, const std::vector<int>& v, match_flag_type f)
: end(last), re(*p), flags(f), N(0), subs(v){}
template <std::size_t CN>
regex_token_iterator_implementation(const regex_type* p, BidirectionalIterator last, const int (&submatches)[CN], match_flag_type f)
: end(last), re(*p), flags(f), N(0)
{
for(std::size_t i = 0; i < CN; ++i)
{
subs.push_back(submatches[i]);
}
}
regex_token_iterator_implementation(const regex_token_iterator_implementation& other) = default;
bool init(BidirectionalIterator first)
{
N = 0;
base = first;
if(regex_search(first, end, what, re, flags, base) == true)
{
N = 0;
result = ((subs[N] == -1) ? what.prefix() : what[(int)subs[N]]);
return true;
}
else if((subs[N] == -1) && (first != end))
{
result.first = first;
result.second = end;
result.matched = (first != end);
N = -1;
return true;
}
return false;
}
bool compare(const regex_token_iterator_implementation& that)
{
if(this == &that) return true;
return (&re.get_data() == &that.re.get_data())
&& (end == that.end)
&& (flags == that.flags)
&& (N == that.N)
&& (what[0].first == that.what[0].first)
&& (what[0].second == that.what[0].second);
}
const value_type& get()
{ return result; }
bool next()
{
if(N == -1)
return false;
if(N+1 < (int)subs.size())
{
++N;
result =((subs[N] == -1) ? what.prefix() : what[subs[N]]);
return true;
}
//if(what.prefix().first != what[0].second)
// flags |= /*match_prev_avail |*/ regex_constants::match_not_bob;
BidirectionalIterator last_end(what[0].second);
if(regex_search(last_end, end, what, re, ((what[0].first == what[0].second) ? flags | regex_constants::match_not_initial_null : flags), base))
{
N =0;
result =((subs[N] == -1) ? what.prefix() : what[subs[N]]);
return true;
}
else if((last_end != end) && (subs[0] == -1))
{
N =-1;
result.first = last_end;
result.second = end;
result.matched = (last_end != end);
return true;
}
return false;
}
private:
regex_token_iterator_implementation& operator=(const regex_token_iterator_implementation&);
};
template <class BidirectionalIterator,
class charT = typename std::iterator_traits<BidirectionalIterator>::value_type,
class traits = regex_traits<charT> >
class regex_token_iterator
{
private:
typedef regex_token_iterator_implementation<BidirectionalIterator, charT, traits> impl;
typedef std::shared_ptr<impl> pimpl;
public:
typedef basic_regex<charT, traits> regex_type;
typedef sub_match<BidirectionalIterator> value_type;
typedef typename std::iterator_traits<BidirectionalIterator>::difference_type
difference_type;
typedef const value_type* pointer;
typedef const value_type& reference;
typedef std::forward_iterator_tag iterator_category;
regex_token_iterator(){}
regex_token_iterator(BidirectionalIterator a, BidirectionalIterator b, const regex_type& re,
int submatch = 0, match_flag_type m = match_default)
: pdata(new impl(&re, b, submatch, m))
{
if(!pdata->init(a))
pdata.reset();
}
regex_token_iterator(BidirectionalIterator a, BidirectionalIterator b, const regex_type& re,
const std::vector<int>& submatches, match_flag_type m = match_default)
: pdata(new impl(&re, b, submatches, m))
{
if(!pdata->init(a))
pdata.reset();
}
template <std::size_t N>
regex_token_iterator(BidirectionalIterator a, BidirectionalIterator b, const regex_type& re,
const int (&submatches)[N], match_flag_type m = match_default)
: pdata(new impl(&re, b, submatches, m))
{
if(!pdata->init(a))
pdata.reset();
}
regex_token_iterator(const regex_token_iterator& that)
: pdata(that.pdata) {}
regex_token_iterator& operator=(const regex_token_iterator& that)
{
pdata = that.pdata;
return *this;
}
bool operator==(const regex_token_iterator& that)const
{
if((pdata.get() == 0) || (that.pdata.get() == 0))
return pdata.get() == that.pdata.get();
return pdata->compare(*(that.pdata.get()));
}
bool operator!=(const regex_token_iterator& that)const
{ return !(*this == that); }
const value_type& operator*()const
{ return pdata->get(); }
const value_type* operator->()const
{ return &(pdata->get()); }
regex_token_iterator& operator++()
{
cow();
if(0 == pdata->next())
{
pdata.reset();
}
return *this;
}
regex_token_iterator operator++(int)
{
regex_token_iterator result(*this);
++(*this);
return result;
}
private:
pimpl pdata;
void cow()
{
// copy-on-write
if(pdata.get() && (pdata.use_count() > 1))
{
pdata.reset(new impl(*(pdata.get())));
}
}
};
typedef regex_token_iterator<const char*> cregex_token_iterator;
typedef regex_token_iterator<std::string::const_iterator> sregex_token_iterator;
#ifndef BOOST_NO_WREGEX
typedef regex_token_iterator<const wchar_t*> wcregex_token_iterator;
typedef regex_token_iterator<std::wstring::const_iterator> wsregex_token_iterator;
#endif
template <class charT, class traits>
inline regex_token_iterator<const charT*, charT, traits> make_regex_token_iterator(const charT* p, const basic_regex<charT, traits>& e, int submatch = 0, regex_constants::match_flag_type m = regex_constants::match_default)
{
return regex_token_iterator<const charT*, charT, traits>(p, p+traits::length(p), e, submatch, m);
}
template <class charT, class traits, class ST, class SA>
inline regex_token_iterator<typename std::basic_string<charT, ST, SA>::const_iterator, charT, traits> make_regex_token_iterator(const std::basic_string<charT, ST, SA>& p, const basic_regex<charT, traits>& e, int submatch = 0, regex_constants::match_flag_type m = regex_constants::match_default)
{
return regex_token_iterator<typename std::basic_string<charT, ST, SA>::const_iterator, charT, traits>(p.begin(), p.end(), e, submatch, m);
}
template <class charT, class traits, std::size_t N>
inline regex_token_iterator<const charT*, charT, traits> make_regex_token_iterator(const charT* p, const basic_regex<charT, traits>& e, const int (&submatch)[N], regex_constants::match_flag_type m = regex_constants::match_default)
{
return regex_token_iterator<const charT*, charT, traits>(p, p+traits::length(p), e, submatch, m);
}
template <class charT, class traits, class ST, class SA, std::size_t N>
inline regex_token_iterator<typename std::basic_string<charT, ST, SA>::const_iterator, charT, traits> make_regex_token_iterator(const std::basic_string<charT, ST, SA>& p, const basic_regex<charT, traits>& e, const int (&submatch)[N], regex_constants::match_flag_type m = regex_constants::match_default)
{
return regex_token_iterator<typename std::basic_string<charT, ST, SA>::const_iterator, charT, traits>(p.begin(), p.end(), e, submatch, m);
}
template <class charT, class traits>
inline regex_token_iterator<const charT*, charT, traits> make_regex_token_iterator(const charT* p, const basic_regex<charT, traits>& e, const std::vector<int>& submatch, regex_constants::match_flag_type m = regex_constants::match_default)
{
return regex_token_iterator<const charT*, charT, traits>(p, p+traits::length(p), e, submatch, m);
}
template <class charT, class traits, class ST, class SA>
inline regex_token_iterator<typename std::basic_string<charT, ST, SA>::const_iterator, charT, traits> make_regex_token_iterator(const std::basic_string<charT, ST, SA>& p, const basic_regex<charT, traits>& e, const std::vector<int>& submatch, regex_constants::match_flag_type m = regex_constants::match_default)
{
return regex_token_iterator<typename std::basic_string<charT, ST, SA>::const_iterator, charT, traits>(p.begin(), p.end(), e, submatch, m);
}
} // namespace boost
#endif // BOOST_REGEX_V5_REGEX_TOKEN_ITERATOR_HPP
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