@@ -145,7 +145,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
}
bool
- _M_word_boundary(_State<_TraitsT> __state) const;
+ _M_word_boundary() const;
bool
_M_lookahead(_State<_TraitsT> __state);
@@ -274,7 +274,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
_M_dfs(__match_mode, __state._M_next);
break;
case _S_opcode_word_boundary:
- if (_M_word_boundary(__state) == !__state._M_neg)
+ if (_M_word_boundary() == !__state._M_neg)
_M_dfs(__match_mode, __state._M_next);
break;
// Here __state._M_alt offers a single start node for a sub-NFA.
@@ -284,9 +284,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
_M_dfs(__match_mode, __state._M_next);
break;
case _S_opcode_match:
+ if (_M_current == _M_end)
+ break;
if (__dfs_mode)
{
- if (_M_current != _M_end && __state._M_matches(*_M_current))
+ if (__state._M_matches(*_M_current))
{
++_M_current;
_M_dfs(__match_mode, __state._M_next);
@@ -407,25 +409,26 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
template<typename _BiIter, typename _Alloc, typename _TraitsT,
bool __dfs_mode>
bool _Executor<_BiIter, _Alloc, _TraitsT, __dfs_mode>::
- _M_word_boundary(_State<_TraitsT>) const
+ _M_word_boundary() const
{
- // By definition.
- bool __ans = false;
- auto __pre = _M_current;
- --__pre;
- if (!(_M_at_begin() && _M_at_end()))
+ bool __left_is_word = false;
+ if (_M_current != _M_begin
+ || (_M_flags & regex_constants::match_prev_avail))
{
- if (_M_at_begin())
- __ans = _M_is_word(*_M_current)
- && !(_M_flags & regex_constants::match_not_bow);
- else if (_M_at_end())
- __ans = _M_is_word(*__pre)
- && !(_M_flags & regex_constants::match_not_eow);
- else
- __ans = _M_is_word(*_M_current)
- != _M_is_word(*__pre);
+ auto __prev = _M_current;
+ if (_M_is_word(*std::prev(__prev)))
+ __left_is_word = true;
}
- return __ans;
+ bool __right_is_word =
+ _M_current != _M_end && _M_is_word(*_M_current);
+
+ if (__left_is_word == __right_is_word)
+ return false;
+ if (__left_is_word && !(_M_flags & regex_constants::match_not_eow))
+ return true;
+ if (__right_is_word && !(_M_flags & regex_constants::match_not_bow))
+ return true;
+ return false;
}
_GLIBCXX_END_NAMESPACE_VERSION