def _getRuleInvocationStack(cls, module):
"""
A more general version of getRuleInvocationStack where you can
pass in, for example, a RecognitionException to get it's rule
stack trace. This routine is shared with all recognizers, hence,
static.
TODO: move to a utility class or something; weird having lexer call
this
"""
# mmmhhh,... perhaps look at the first argument
# (f_locals[co_varnames[0]]?) and test if it's a (sub)class of
# requested recognizer...
rules = []
for frame in reversed(inspect.stack()):
code = frame[0].f_code
codeMod = inspect.getmodule(code)
if codeMod is None:
continue
# skip frames not in requested module
if codeMod.__name__ != module:
continue
# skip some unwanted names
if code.co_name in ('nextToken', '<module>'):
continue
rules.append(code.co_name)
return rules
def combineFollows(self, exact):
followSet = set()
for localFollowSet in reversed(self.following):
followSet |= localFollowSet
if exact and EOR_TOKEN_TYPE not in localFollowSet:
break
followSet -= set([EOR_TOKEN_TYPE])
return followSet
def combineFollows(self, exact):
followSet = set()
for idx, localFollowSet in reversed(list(enumerate(self._state.following))):
followSet |= localFollowSet
if exact:
# can we see end of rule?
if EOR_TOKEN_TYPE in localFollowSet:
# Only leave EOR in set if at top (start rule); this lets
# us know if have to include follow(start rule); i.e., EOF
if idx > 0:
followSet.remove(EOR_TOKEN_TYPE)
else:
# can't see end of rule, quit
break
return followSet
def combineFollows(self, exact):
followSet = set()
for idx, localFollowSet in reversed(list(enumerate(self._state.following))):
followSet |= localFollowSet
if exact:
# can we see end of rule?
if EOR_TOKEN_TYPE in localFollowSet:
# Only leave EOR in set if at top (start rule); this lets
# us know if have to include follow(start rule); i.e., EOF
if idx > 0:
followSet.remove(EOR_TOKEN_TYPE)
else:
# can't see end of rule, quit
break
return followSet
