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I believe posix extended expr is feature complete. Getting started on ecma exprs. 

llvm-svn: 109126
This commit is contained in:
Howard Hinnant 2010-07-22 17:53:24 +00:00
parent ff66cd43c4
commit f7109438ea
2 changed files with 1193 additions and 0 deletions
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168
libcxx/include/regex
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@ -2504,6 +2504,24 @@ private:
template <class _ForwardIterator>
_ForwardIterator
__parse_QUOTED_CHAR_ERE(_ForwardIterator __first, _ForwardIterator __last);
template <class _ForwardIterator>
_ForwardIterator
__parse_ecma_exp(_ForwardIterator __first, _ForwardIterator __last);
template <class _ForwardIterator>
_ForwardIterator
__parse_alternative(_ForwardIterator __first, _ForwardIterator __last);
template <class _ForwardIterator>
_ForwardIterator
__parse_term(_ForwardIterator __first, _ForwardIterator __last);
template <class _ForwardIterator>
_ForwardIterator
__parse_assertion(_ForwardIterator __first, _ForwardIterator __last);
template <class _ForwardIterator>
_ForwardIterator
__parse_atom(_ForwardIterator __first, _ForwardIterator __last);
template <class _ForwardIterator>
_ForwardIterator
__parse_quantifier(_ForwardIterator __first, _ForwardIterator __last) {} // temp!
void __push_l_anchor() {__left_anchor_ = true;}
void __push_r_anchor();
@ -2522,6 +2540,12 @@ private:
__owns_one_state<_CharT>* __sb);
void __push_begin_marked_subexpression();
void __push_end_marked_subexpression(unsigned);
void __push_empty();
void __push_word_boundary(bool) {}
void __push_start_pos_lookahead() {}
void __push_end_pos_lookahead() {}
void __push_start_neg_lookahead() {}
void __push_end_neg_lookahead() {}
template <class _Allocator>
bool
@ -2619,6 +2643,7 @@ basic_regex<_CharT, _Traits>::__parse(_ForwardIterator __first,
switch (__flags_ & 0x3F0)
{
case ECMAScript:
__parse_ecma_exp(__first, __last);
break;
case basic:
__parse_basic_reg_exp(__first, __last);
@ -3463,6 +3488,141 @@ basic_regex<_CharT, _Traits>::__parse_DUP_COUNT(_ForwardIterator __first,
return __first;
}
template <class _CharT, class _Traits>
template <class _ForwardIterator>
_ForwardIterator
basic_regex<_CharT, _Traits>::__parse_ecma_exp(_ForwardIterator __first,
_ForwardIterator __last)
{
__owns_one_state<_CharT>* __sa = __end_;
_ForwardIterator __temp = __parse_alternative(__first, __last);
if (__temp == __first)
__push_empty();
__first = __temp;
while (__first != __last && *__first == '|')
{
__owns_one_state<_CharT>* __sb = __end_;
__temp = __parse_alternative(++__first, __last);
if (__temp == __first)
__push_empty();
__push_alternation(__sa, __sb);
__first = __temp;
}
return __first;
}
template <class _CharT, class _Traits>
template <class _ForwardIterator>
_ForwardIterator
basic_regex<_CharT, _Traits>::__parse_alternative(_ForwardIterator __first,
_ForwardIterator __last)
{
while (true)
{
_ForwardIterator __temp = __parse_term(__first, __last);
if (__temp == __first)
break;
__first = __temp;
}
return __first;
}
template <class _CharT, class _Traits>
template <class _ForwardIterator>
_ForwardIterator
basic_regex<_CharT, _Traits>::__parse_term(_ForwardIterator __first,
_ForwardIterator __last)
{
_ForwardIterator __temp = __parse_assertion(__first, __last);
if (__temp == __first)
{
__temp = __parse_atom(__first, __last);
if (__temp != __first)
__first = __parse_quantifier(__temp, __last);
}
return __first;
}
template <class _CharT, class _Traits>
template <class _ForwardIterator>
_ForwardIterator
basic_regex<_CharT, _Traits>::__parse_assertion(_ForwardIterator __first,
_ForwardIterator __last)
{
if (__first != __last)
{
switch (*__first)
{
case '^':
__push_l_anchor();
++__first;
break;
case '$':
__push_r_anchor();
++__first;
break;
case '\\':
{
_ForwardIterator __temp = _STD::next(__first);
if (__temp != __last)
{
if (*__temp == 'b')
{
__push_word_boundary(true);
__first = ++__temp;
}
else if (*__temp == 'B')
{
__push_word_boundary(false);
__first = ++__temp;
}
}
}
break;
case '(':
{
_ForwardIterator __temp = _STD::next(__first);
if (__temp != __last && *__temp == '?')
{
if (++__temp != __last)
{
switch (*__temp)
{
case '=':
__push_start_pos_lookahead();
__temp = __parse_ecma_exp(++__temp, __last);
if (__temp == __last || *__temp != ')')
throw regex_error(regex_constants::error_paren);
__push_end_pos_lookahead();
__first = ++__temp;
break;
case '!':
__push_start_neg_lookahead();
__temp = __parse_ecma_exp(++__temp, __last);
if (__temp == __last || *__temp != ')')
throw regex_error(regex_constants::error_paren);
__push_end_neg_lookahead();
__first = ++__temp;
break;
}
}
}
}
break;
}
}
return __first;
}
template <class _CharT, class _Traits>
template <class _ForwardIterator>
_ForwardIterator
basic_regex<_CharT, _Traits>::__parse_atom(_ForwardIterator __first,
_ForwardIterator __last)
{
return __first; // temp!
}
template <class _CharT, class _Traits>
void
basic_regex<_CharT, _Traits>::__push_loop(size_t __min, size_t __max,
@ -3538,6 +3698,14 @@ basic_regex<_CharT, _Traits>::__push_match_any()
__end_ = static_cast<__owns_one_state<_CharT>*>(__end_->first());
}
template <class _CharT, class _Traits>
void
basic_regex<_CharT, _Traits>::__push_empty()
{
__end_->first() = new __empty_state<_CharT>(__end_->first());
__end_ = static_cast<__owns_one_state<_CharT>*>(__end_->first());
}
template <class _CharT, class _Traits>
void
basic_regex<_CharT, _Traits>::__push_back_ref(int __i)

1025
libcxx/test/re/re.alg/re.alg.search/extended.pass.cpp
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