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kicad/include/boost/regex/v4/perl_matcher_recursive.hpp

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update to boost 1.49.0 subset
2012-05-16 01:42:04 +00:00
/*
*
* Copyright (c) 2002
* 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 perl_matcher_common.cpp
* VERSION see <boost/version.hpp>
* DESCRIPTION: Definitions of perl_matcher member functions that are
* specific to the recursive implementation.
*/
#ifndef BOOST_REGEX_V4_PERL_MATCHER_RECURSIVE_HPP
#define BOOST_REGEX_V4_PERL_MATCHER_RECURSIVE_HPP
#ifdef BOOST_MSVC
#pragma warning(push)
#pragma warning(disable: 4103)
#endif
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_PREFIX
#endif
#ifdef BOOST_MSVC
#pragma warning(pop)
#endif
#ifdef BOOST_MSVC
#pragma warning(push)
#pragma warning(disable: 4800)
#endif
namespace boost{
namespace re_detail{
template <class BidiIterator>
class backup_subex
{
int index;
sub_match<BidiIterator> sub;
public:
template <class A>
backup_subex(const match_results<BidiIterator, A>& w, int i)
: index(i), sub(w[i], false) {}
template <class A>
void restore(match_results<BidiIterator, A>& w)
{
w.set_first(sub.first, index, index == 0);
w.set_second(sub.second, index, sub.matched, index == 0);
}
const sub_match<BidiIterator>& get() { return sub; }
};
template <class BidiIterator, class Allocator, class traits>
bool perl_matcher<BidiIterator, Allocator, traits>::match_all_states()
{
static matcher_proc_type const s_match_vtable[30] =
{
(&perl_matcher<BidiIterator, Allocator, traits>::match_startmark),
&perl_matcher<BidiIterator, Allocator, traits>::match_endmark,
&perl_matcher<BidiIterator, Allocator, traits>::match_literal,
&perl_matcher<BidiIterator, Allocator, traits>::match_start_line,
&perl_matcher<BidiIterator, Allocator, traits>::match_end_line,
&perl_matcher<BidiIterator, Allocator, traits>::match_wild,
&perl_matcher<BidiIterator, Allocator, traits>::match_match,
&perl_matcher<BidiIterator, Allocator, traits>::match_word_boundary,
&perl_matcher<BidiIterator, Allocator, traits>::match_within_word,
&perl_matcher<BidiIterator, Allocator, traits>::match_word_start,
&perl_matcher<BidiIterator, Allocator, traits>::match_word_end,
&perl_matcher<BidiIterator, Allocator, traits>::match_buffer_start,
&perl_matcher<BidiIterator, Allocator, traits>::match_buffer_end,
&perl_matcher<BidiIterator, Allocator, traits>::match_backref,
&perl_matcher<BidiIterator, Allocator, traits>::match_long_set,
&perl_matcher<BidiIterator, Allocator, traits>::match_set,
&perl_matcher<BidiIterator, Allocator, traits>::match_jump,
&perl_matcher<BidiIterator, Allocator, traits>::match_alt,
&perl_matcher<BidiIterator, Allocator, traits>::match_rep,
&perl_matcher<BidiIterator, Allocator, traits>::match_combining,
&perl_matcher<BidiIterator, Allocator, traits>::match_soft_buffer_end,
&perl_matcher<BidiIterator, Allocator, traits>::match_restart_continue,
// Although this next line *should* be evaluated at compile time, in practice
// some compilers (VC++) emit run-time initialisation which breaks thread
// safety, so use a dispatch function instead:
//(::boost::is_random_access_iterator<BidiIterator>::value ? &perl_matcher<BidiIterator, Allocator, traits>::match_dot_repeat_fast : &perl_matcher<BidiIterator, Allocator, traits>::match_dot_repeat_slow),
&perl_matcher<BidiIterator, Allocator, traits>::match_dot_repeat_dispatch,
&perl_matcher<BidiIterator, Allocator, traits>::match_char_repeat,
&perl_matcher<BidiIterator, Allocator, traits>::match_set_repeat,
&perl_matcher<BidiIterator, Allocator, traits>::match_long_set_repeat,
&perl_matcher<BidiIterator, Allocator, traits>::match_backstep,
&perl_matcher<BidiIterator, Allocator, traits>::match_assert_backref,
&perl_matcher<BidiIterator, Allocator, traits>::match_toggle_case,
&perl_matcher<BidiIterator, Allocator, traits>::match_recursion,
};
if(state_count > max_state_count)
raise_error(traits_inst, regex_constants::error_complexity);
while(pstate)
{
matcher_proc_type proc = s_match_vtable[pstate->type];
++state_count;
if(!(this->*proc)())
{
if((m_match_flags & match_partial) && (position == last) && (position != search_base))
m_has_partial_match = true;
return 0;
}
}
return true;
}
template <class BidiIterator, class Allocator, class traits>
bool perl_matcher<BidiIterator, Allocator, traits>::match_startmark()
{
int index = static_cast<const re_brace*>(pstate)->index;
icase = static_cast<const re_brace*>(pstate)->icase;
bool r = true;
switch(index)
{
case 0:
pstate = pstate->next.p;
break;
case -1:
case -2:
{
// forward lookahead assert:
BidiIterator old_position(position);
const re_syntax_base* next_pstate = static_cast<const re_jump*>(pstate->next.p)->alt.p->next.p;
pstate = pstate->next.p->next.p;
r = match_all_states();
pstate = next_pstate;
position = old_position;
if((r && (index != -1)) || (!r && (index != -2)))
r = false;
else
r = true;
break;
}
case -3:
{
// independent sub-expression:
bool old_independent = m_independent;
m_independent = true;
const re_syntax_base* next_pstate = static_cast<const re_jump*>(pstate->next.p)->alt.p->next.p;
pstate = pstate->next.p->next.p;
r = match_all_states();
pstate = next_pstate;
m_independent = old_independent;
#ifdef BOOST_REGEX_MATCH_EXTRA
if(r && (m_match_flags & match_extra))
{
//
// our captures have been stored in *m_presult
// we need to unpack them, and insert them
// back in the right order when we unwind the stack:
//
unsigned i;
match_results<BidiIterator, Allocator> tm(*m_presult);
for(i = 0; i < tm.size(); ++i)
(*m_presult)[i].get_captures().clear();
// match everything else:
r = match_all_states();
// now place the stored captures back:
for(i = 0; i < tm.size(); ++i)
{
typedef typename sub_match<BidiIterator>::capture_sequence_type seq;
seq& s1 = (*m_presult)[i].get_captures();
const seq& s2 = tm[i].captures();
s1.insert(
s1.end(),
s2.begin(),
s2.end());
}
}
#endif
break;
}
case -4:
{
// conditional expression:
const re_alt* alt = static_cast<const re_alt*>(pstate->next.p);
BOOST_ASSERT(alt->type == syntax_element_alt);
pstate = alt->next.p;
if(pstate->type == syntax_element_assert_backref)
{
if(!match_assert_backref())
pstate = alt->alt.p;
break;
}
else
{
// zero width assertion, have to match this recursively:
BOOST_ASSERT(pstate->type == syntax_element_startmark);
bool negated = static_cast<const re_brace*>(pstate)->index == -2;
BidiIterator saved_position = position;
const re_syntax_base* next_pstate = static_cast<const re_jump*>(pstate->next.p)->alt.p->next.p;
pstate = pstate->next.p->next.p;
bool res = match_all_states();
position = saved_position;
if(negated)
res = !res;
if(res)
pstate = next_pstate;
else
pstate = alt->alt.p;
break;
}
}
case -5:
{
// Reset start of $0, since we have a \K escape
backup_subex<BidiIterator> sub(*m_presult, 0);
m_presult->set_first(position, 0, true);
pstate = pstate->next.p;
r = match_all_states();
if(r == false)
sub.restore(*m_presult);
break;
}
default:
{
BOOST_ASSERT(index > 0);
if((m_match_flags & match_nosubs) == 0)
{
backup_subex<BidiIterator> sub(*m_presult, index);
m_presult->set_first(position, index);
pstate = pstate->next.p;
r = match_all_states();
if(r == false)
sub.restore(*m_presult);
#ifdef BOOST_REGEX_MATCH_EXTRA
//
// we have a match, push the capture information onto the stack:
//
else if(sub.get().matched && (match_extra & m_match_flags))
((*m_presult)[index]).get_captures().push_back(sub.get());
#endif
}
else
{
pstate = pstate->next.p;
}
break;
}
}
return r;
}
template <class BidiIterator, class Allocator, class traits>
bool perl_matcher<BidiIterator, Allocator, traits>::match_alt()
{
bool take_first, take_second;
const re_alt* jmp = static_cast<const re_alt*>(pstate);
// find out which of these two alternatives we need to take:
if(position == last)
{
take_first = jmp->can_be_null & mask_take;
take_second = jmp->can_be_null & mask_skip;
}
else
{
take_first = can_start(*position, jmp->_map, (unsigned char)mask_take);
take_second = can_start(*position, jmp->_map, (unsigned char)mask_skip);
}
if(take_first)
{
// we can take the first alternative,
// see if we need to push next alternative:
if(take_second)
{
BidiIterator oldposition(position);
const re_syntax_base* old_pstate = jmp->alt.p;
pstate = pstate->next.p;
if(!match_all_states())
{
pstate = old_pstate;
position = oldposition;
}
return true;
}
pstate = pstate->next.p;
return true;
}
if(take_second)
{
pstate = jmp->alt.p;
return true;
}
return false; // neither option is possible
}
template <class BidiIterator, class Allocator, class traits>
bool perl_matcher<BidiIterator, Allocator, traits>::match_rep()
{
#ifdef BOOST_MSVC
#pragma warning(push)
#pragma warning(disable:4127 4244)
#endif
const re_repeat* rep = static_cast<const re_repeat*>(pstate);
//
// Always copy the repeat count, so that the state is restored
// when we exit this scope:
//
repeater_count<BidiIterator> r(rep->state_id, &next_count, position);
//
// If we've had at least one repeat already, and the last one
// matched the NULL string then set the repeat count to
// maximum:
//
next_count->check_null_repeat(position, rep->max);
// find out which of these two alternatives we need to take:
bool take_first, take_second;
if(position == last)
{
take_first = rep->can_be_null & mask_take;
take_second = rep->can_be_null & mask_skip;
}
else
{
take_first = can_start(*position, rep->_map, (unsigned char)mask_take);
take_second = can_start(*position, rep->_map, (unsigned char)mask_skip);
}
if(next_count->get_count() < rep->min)
{
// we must take the repeat:
if(take_first)
{
// increase the counter:
++(*next_count);
pstate = rep->next.p;
return match_all_states();
}
return false;
}
bool greedy = (rep->greedy) && (!(m_match_flags & regex_constants::match_any) || m_independent);
if(greedy)
{
// try and take the repeat if we can:
if((next_count->get_count() < rep->max) && take_first)
{
// store position in case we fail:
BidiIterator pos = position;
// increase the counter:
++(*next_count);
pstate = rep->next.p;
if(match_all_states())
return true;
// failed repeat, reset posistion and fall through for alternative:
position = pos;
}
if(take_second)
{
pstate = rep->alt.p;
return true;
}
return false; // can't take anything, fail...
}
else // non-greedy
{
// try and skip the repeat if we can:
if(take_second)
{
// store position in case we fail:
BidiIterator pos = position;
pstate = rep->alt.p;
if(match_all_states())
return true;
// failed alternative, reset posistion and fall through for repeat:
position = pos;
}
if((next_count->get_count() < rep->max) && take_first)
{
// increase the counter:
++(*next_count);
pstate = rep->next.p;
return match_all_states();
}
}
return false;
#ifdef BOOST_MSVC
#pragma warning(pop)
#endif
}
template <class BidiIterator, class Allocator, class traits>
bool perl_matcher<BidiIterator, Allocator, traits>::match_dot_repeat_slow()
{
#ifdef BOOST_MSVC
#pragma warning(push)
#pragma warning(disable:4127)
#endif
unsigned count = 0;
const re_repeat* rep = static_cast<const re_repeat*>(pstate);
re_syntax_base* psingle = rep->next.p;
// match compulsary repeats first:
while(count < rep->min)
{
pstate = psingle;
if(!match_wild())
return false;
++count;
}
bool greedy = (rep->greedy) && (!(m_match_flags & regex_constants::match_any) || m_independent);
if(greedy)
{
// normal repeat:
while(count < rep->max)
{
pstate = psingle;
if(!match_wild())
break;
++count;
}
if((rep->leading) && (count < rep->max))
restart = position;
pstate = rep;
return backtrack_till_match(count - rep->min);
}
else
{
// non-greedy, keep trying till we get a match:
BidiIterator save_pos;
do
{
if((rep->leading) && (rep->max == UINT_MAX))
restart = position;
pstate = rep->alt.p;
save_pos = position;
++state_count;
if(match_all_states())
return true;
if(count >= rep->max)
return false;
++count;
pstate = psingle;
position = save_pos;
if(!match_wild())
return false;
}while(true);
}
#ifdef BOOST_MSVC
#pragma warning(pop)
#endif
}
template <class BidiIterator, class Allocator, class traits>
bool perl_matcher<BidiIterator, Allocator, traits>::match_dot_repeat_fast()
{
#ifdef BOOST_MSVC
#pragma warning(push)
#pragma warning(disable:4127)
#endif
if(m_match_flags & match_not_dot_null)
return match_dot_repeat_slow();
if((static_cast<const re_dot*>(pstate->next.p)->mask & match_any_mask) == 0)
return match_dot_repeat_slow();
//
// start by working out how much we can skip:
//
const re_repeat* rep = static_cast<const re_repeat*>(pstate);
#ifdef BOOST_MSVC
#pragma warning(push)
#pragma warning(disable:4267)
#endif
bool greedy = (rep->greedy) && (!(m_match_flags & regex_constants::match_any) || m_independent);
std::size_t count = (std::min)(static_cast<std::size_t>(::boost::re_detail::distance(position, last)), static_cast<std::size_t>(greedy ? rep->max : rep->min));
if(rep->min > count)
{
position = last;
return false; // not enough text left to match
}
std::advance(position, count);
#ifdef BOOST_MSVC
#pragma warning(pop)
#endif
if((rep->leading) && (count < rep->max) && greedy)
restart = position;
if(greedy)
return backtrack_till_match(count - rep->min);
// non-greedy, keep trying till we get a match:
BidiIterator save_pos;
do
{
while((position != last) && (count < rep->max) && !can_start(*position, rep->_map, mask_skip))
{
++position;
++count;
}
if((rep->leading) && (rep->max == UINT_MAX))
restart = position;
pstate = rep->alt.p;
save_pos = position;
++state_count;
if(match_all_states())
return true;
if(count >= rep->max)
return false;
if(save_pos == last)
return false;
position = ++save_pos;
++count;
}while(true);
#ifdef BOOST_MSVC
#pragma warning(pop)
#endif
}
template <class BidiIterator, class Allocator, class traits>
bool perl_matcher<BidiIterator, Allocator, traits>::match_char_repeat()
{
#ifdef BOOST_MSVC
#pragma warning(push)
#pragma warning(disable:4127)
#pragma warning(disable:4267)
#endif
#ifdef __BORLANDC__
#pragma option push -w-8008 -w-8066 -w-8004
#endif
const re_repeat* rep = static_cast<const re_repeat*>(pstate);
BOOST_ASSERT(1 == static_cast<const re_literal*>(rep->next.p)->length);
const char_type what = *reinterpret_cast<const char_type*>(static_cast<const re_literal*>(rep->next.p) + 1);
//
// start by working out how much we can skip:
//
bool greedy = (rep->greedy) && (!(m_match_flags & regex_constants::match_any) || m_independent);
std::size_t count, desired;
if(::boost::is_random_access_iterator<BidiIterator>::value)
{
desired =
(std::min)(
(std::size_t)(greedy ? rep->max : rep->min),
(std::size_t)::boost::re_detail::distance(position, last));
count = desired;
++desired;
if(icase)
{
while(--desired && (traits_inst.translate_nocase(*position) == what))
{
++position;
}
}
else
{
while(--desired && (traits_inst.translate(*position) == what))
{
++position;
}
}
count = count - desired;
}
else
{
count = 0;
desired = greedy ? rep->max : rep->min;
while((count < desired) && (position != last) && (traits_inst.translate(*position, icase) == what))
{
++position;
++count;
}
}
if((rep->leading) && (count < rep->max) && greedy)
restart = position;
if(count < rep->min)
return false;
if(greedy)
return backtrack_till_match(count - rep->min);
// non-greedy, keep trying till we get a match:
BidiIterator save_pos;
do
{
while((position != last) && (count < rep->max) && !can_start(*position, rep->_map, mask_skip))
{
if((traits_inst.translate(*position, icase) == what))
{
++position;
++count;
}
else
return false; // counldn't repeat even though it was the only option
}
if((rep->leading) && (rep->max == UINT_MAX))
restart = position;
pstate = rep->alt.p;
save_pos = position;
++state_count;
if(match_all_states())
return true;
if(count >= rep->max)
return false;
position = save_pos;
if(position == last)
return false;
if(traits_inst.translate(*position, icase) == what)
{
++position;
++count;
}
else
{
return false;
}
}while(true);
#ifdef __BORLANDC__
#pragma option pop
#endif
#ifdef BOOST_MSVC
#pragma warning(pop)
#endif
}
template <class BidiIterator, class Allocator, class traits>
bool perl_matcher<BidiIterator, Allocator, traits>::match_set_repeat()
{
#ifdef BOOST_MSVC
#pragma warning(push)
#pragma warning(disable:4127)
#endif
#ifdef __BORLANDC__
#pragma option push -w-8008 -w-8066 -w-8004
#endif
const re_repeat* rep = static_cast<const re_repeat*>(pstate);
const unsigned char* map = static_cast<const re_set*>(rep->next.p)->_map;
unsigned count = 0;
//
// start by working out how much we can skip:
//
bool greedy = (rep->greedy) && (!(m_match_flags & regex_constants::match_any) || m_independent);
std::size_t desired = greedy ? rep->max : rep->min;
if(::boost::is_random_access_iterator<BidiIterator>::value)
{
BidiIterator end = position;
std::advance(end, (std::min)((std::size_t)::boost::re_detail::distance(position, last), desired));
BidiIterator origin(position);
while((position != end) && map[static_cast<unsigned char>(traits_inst.translate(*position, icase))])
{
++position;
}
count = (unsigned)::boost::re_detail::distance(origin, position);
}
else
{
while((count < desired) && (position != last) && map[static_cast<unsigned char>(traits_inst.translate(*position, icase))])
{
++position;
++count;
}
}
if((rep->leading) && (count < rep->max) && greedy)
restart = position;
if(count < rep->min)
return false;
if(greedy)
return backtrack_till_match(count - rep->min);
// non-greedy, keep trying till we get a match:
BidiIterator save_pos;
do
{
while((position != last) && (count < rep->max) && !can_start(*position, rep->_map, mask_skip))
{
if(map[static_cast<unsigned char>(traits_inst.translate(*position, icase))])
{
++position;
++count;
}
else
return false; // counldn't repeat even though it was the only option
}
if((rep->leading) && (rep->max == UINT_MAX))
restart = position;
pstate = rep->alt.p;
save_pos = position;
++state_count;
if(match_all_states())
return true;
if(count >= rep->max)
return false;
position = save_pos;
if(position == last)
return false;
if(map[static_cast<unsigned char>(traits_inst.translate(*position, icase))])
{
++position;
++count;
}
else
{
return false;
}
}while(true);
#ifdef __BORLANDC__
#pragma option pop
#endif
#ifdef BOOST_MSVC
#pragma warning(pop)
#endif
}
template <class BidiIterator, class Allocator, class traits>
bool perl_matcher<BidiIterator, Allocator, traits>::match_long_set_repeat()
{
#ifdef BOOST_MSVC
#pragma warning(push)
#pragma warning(disable:4127)
#endif
#ifdef __BORLANDC__
#pragma option push -w-8008 -w-8066 -w-8004
#endif
typedef typename traits::char_class_type char_class_type;
const re_repeat* rep = static_cast<const re_repeat*>(pstate);
const re_set_long<char_class_type>* set = static_cast<const re_set_long<char_class_type>*>(pstate->next.p);
unsigned count = 0;
//
// start by working out how much we can skip:
//
bool greedy = (rep->greedy) && (!(m_match_flags & regex_constants::match_any) || m_independent);
std::size_t desired = greedy ? rep->max : rep->min;
if(::boost::is_random_access_iterator<BidiIterator>::value)
{
BidiIterator end = position;
std::advance(end, (std::min)((std::size_t)::boost::re_detail::distance(position, last), desired));
BidiIterator origin(position);
while((position != end) && (position != re_is_set_member(position, last, set, re.get_data(), icase)))
{
++position;
}
count = (unsigned)::boost::re_detail::distance(origin, position);
}
else
{
while((count < desired) && (position != last) && (position != re_is_set_member(position, last, set, re.get_data(), icase)))
{
++position;
++count;
}
}
if((rep->leading) && (count < rep->max) && greedy)
restart = position;
if(count < rep->min)
return false;
if(greedy)
return backtrack_till_match(count - rep->min);
// non-greedy, keep trying till we get a match:
BidiIterator save_pos;
do
{
while((position != last) && (count < rep->max) && !can_start(*position, rep->_map, mask_skip))
{
if(position != re_is_set_member(position, last, set, re.get_data(), icase))
{
++position;
++count;
}
else
return false; // counldn't repeat even though it was the only option
}
if((rep->leading) && (rep->max == UINT_MAX))
restart = position;
pstate = rep->alt.p;
save_pos = position;
++state_count;
if(match_all_states())
return true;
if(count >= rep->max)
return false;
position = save_pos;
if(position == last)
return false;
if(position != re_is_set_member(position, last, set, re.get_data(), icase))
{
++position;
++count;
}
else
{
return false;
}
}while(true);
#ifdef __BORLANDC__
#pragma option pop
#endif
#ifdef BOOST_MSVC
#pragma warning(pop)
#endif
}
template <class BidiIterator, class Allocator, class traits>
bool perl_matcher<BidiIterator, Allocator, traits>::backtrack_till_match(std::size_t count)
{
#ifdef BOOST_MSVC
#pragma warning(push)
#pragma warning(disable:4127)
#endif
if((m_match_flags & match_partial) && (position == last))
m_has_partial_match = true;
const re_repeat* rep = static_cast<const re_repeat*>(pstate);
BidiIterator backtrack = position;
if(position == last)
{
if(rep->can_be_null & mask_skip)
{
pstate = rep->alt.p;
if(match_all_states())
return true;
}
if(count)
{
position = --backtrack;
--count;
}
else
return false;
}
do
{
while(count && !can_start(*position, rep->_map, mask_skip))
{
--position;
--count;
++state_count;
}
pstate = rep->alt.p;
backtrack = position;
if(match_all_states())
return true;
if(count == 0)
return false;
position = --backtrack;
++state_count;
--count;
}while(true);
#ifdef BOOST_MSVC
#pragma warning(pop)
#endif
}
template <class BidiIterator, class Allocator, class traits>
bool perl_matcher<BidiIterator, Allocator, traits>::match_recursion()
{
BOOST_ASSERT(pstate->type == syntax_element_recurse);
//
// Set new call stack:
//
if(recursion_stack.capacity() == 0)
{
recursion_stack.reserve(50);
}
recursion_stack.push_back(recursion_info<results_type>());
recursion_stack.back().preturn_address = pstate->next.p;
recursion_stack.back().results = *m_presult;
recursion_stack.back().repeater_stack = next_count;
pstate = static_cast<const re_jump*>(pstate)->alt.p;
recursion_stack.back().idx = static_cast<const re_brace*>(pstate)->index;
repeater_count<BidiIterator>* saved = next_count;
repeater_count<BidiIterator> r(&next_count); // resets all repeat counts since we're recursing and starting fresh on those
next_count = &r;
bool result = match_all_states();
next_count = saved;
if(!result)
{
next_count = recursion_stack.back().repeater_stack;
*m_presult = recursion_stack.back().results;
recursion_stack.pop_back();
return false;
}
return true;
}
template <class BidiIterator, class Allocator, class traits>
bool perl_matcher<BidiIterator, Allocator, traits>::match_endmark()
{
int index = static_cast<const re_brace*>(pstate)->index;
icase = static_cast<const re_brace*>(pstate)->icase;
if(index > 0)
{
if((m_match_flags & match_nosubs) == 0)
{
m_presult->set_second(position, index);
}
if(!recursion_stack.empty())
{
if(index == recursion_stack.back().idx)
{
recursion_info<results_type> saved = recursion_stack.back();
recursion_stack.pop_back();
pstate = saved.preturn_address;
repeater_count<BidiIterator>* saved_count = next_count;
next_count = saved.repeater_stack;
*m_presult = saved.results;
if(!match_all_states())
{
recursion_stack.push_back(saved);
next_count = saved_count;
return false;
}
}
}
}
else if((index < 0) && (index != -4))
{
// matched forward lookahead:
pstate = 0;
return true;
}
pstate = pstate ? pstate->next.p : 0;
return true;
}
template <class BidiIterator, class Allocator, class traits>
bool perl_matcher<BidiIterator, Allocator, traits>::match_match()
{
if(!recursion_stack.empty())
{
BOOST_ASSERT(0 == recursion_stack.back().idx);
const re_syntax_base* saved_state = pstate = recursion_stack.back().preturn_address;
*m_presult = recursion_stack.back().results;
recursion_stack.pop_back();
if(!match_all_states())
{
recursion_stack.push_back(recursion_info<results_type>());
recursion_stack.back().preturn_address = saved_state;
recursion_stack.back().results = *m_presult;
return false;
}
return true;
}
if((m_match_flags & match_not_null) && (position == (*m_presult)[0].first))
return false;
if((m_match_flags & match_all) && (position != last))
return false;
if((m_match_flags & regex_constants::match_not_initial_null) && (position == search_base))
return false;
m_presult->set_second(position);
pstate = 0;
m_has_found_match = true;
if((m_match_flags & match_posix) == match_posix)
{
m_result.maybe_assign(*m_presult);
if((m_match_flags & match_any) == 0)
return false;
}
#ifdef BOOST_REGEX_MATCH_EXTRA
if(match_extra & m_match_flags)
{
for(unsigned i = 0; i < m_presult->size(); ++i)
if((*m_presult)[i].matched)
((*m_presult)[i]).get_captures().push_back((*m_presult)[i]);
}
#endif
return true;
}
} // namespace re_detail
} // namespace boost
#ifdef BOOST_MSVC
#pragma warning(pop)
#endif
#ifdef BOOST_MSVC
#pragma warning(push)
#pragma warning(disable: 4103)
#endif
#ifdef BOOST_HAS_ABI_HEADERS
# include BOOST_ABI_SUFFIX
#endif
#ifdef BOOST_MSVC
#pragma warning(pop)
#endif
#endif