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Added initial support for recursive expressions.

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Updated docs and tests accordingly.

[SVN r54994]
This commit is contained in:
John Maddock
2009-07-17 10:23:50 +00:00
parent 02a629baf7
commit 5a6bc29d7c
44 changed files with 1013 additions and 264 deletions
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65
include/boost/regex/v4/perl_matcher_common.hpp
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@ -345,25 +345,6 @@ bool perl_matcher<BidiIterator, Allocator, traits>::match_prefix()
return m_has_found_match;
}
template <class BidiIterator, class Allocator, class traits>
bool perl_matcher<BidiIterator, Allocator, traits>::match_endmark()
{
int index = static_cast<const re_brace*>(pstate)->index;
if(index > 0)
{
if((m_match_flags & match_nosubs) == 0)
m_presult->set_second(position, index);
}
else if((index < 0) && (index != -4))
{
// matched forward lookahead:
pstate = 0;
return true;
}
pstate = pstate->next.p;
return true;
}
template <class BidiIterator, class Allocator, class traits>
bool perl_matcher<BidiIterator, Allocator, traits>::match_literal()
{
@ -464,35 +445,6 @@ bool perl_matcher<BidiIterator, Allocator, traits>::match_wild()
return true;
}
template <class BidiIterator, class Allocator, class traits>
bool perl_matcher<BidiIterator, Allocator, traits>::match_match()
{
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;
}
template <class BidiIterator, class Allocator, class traits>
bool perl_matcher<BidiIterator, Allocator, traits>::match_word_boundary()
{
@ -760,8 +712,21 @@ template <class BidiIterator, class Allocator, class traits>
inline bool perl_matcher<BidiIterator, Allocator, traits>::match_assert_backref()
{
// return true if marked sub-expression N has been matched:
bool result = (*m_presult)[static_cast<const re_brace*>(pstate)->index].matched;
pstate = pstate->next.p;
int index = static_cast<const re_brace*>(pstate)->index;
bool result;
if(index > 0)
{
// Have we matched subexpression "index"?
result = (*m_presult)[index].matched;
pstate = pstate->next.p;
}
else
{
// Have we recursed into subexpression "index"?
// If index == 0 then check for any recursion at all, otherwise for recursion to -index-1.
result = recursion_stack_position && ((recursion_stack[recursion_stack_position-1].id == -index-1) || (index == 0));
pstate = pstate->next.p;
}
return result;
}