def fsm_char_pattern(cls, ch):
"""Return FSM character pattren registered within tokenizer.
:Parameters:
ch : str
the FSM character
:Note:
If it doesn't exist, this method will create empty dictionary
``_fsm_char_patterns`` within ``cls`` subclass (as a class
attribute).
:Note:
This method may throw exceptions in case the `ch` was not
registered. For exception specification, see documentation of
`ezmlex.patterns.pattern()`.
"""
from ezmlex.patterns import pattern
return pattern(cls.fsm_char_patterns(), ch)
def pattern(cls, *args):
"""Return a helper pattern registered within tokenizer.
:Parameters:
args
arguments and their meaning are same as for
`ezmlex.patterns.pattern()`,
except that there must be no ``tab`` argument in
``*args`` list, and the ``*args`` list must start from ``_id``.
:Note:
If it doesn't exist, this method will create empty dictionary
``_char_classes`` within ``cls`` subclass (as a class attribute).
:Note:
This method may throw exceptions in case the requested pattern was
not registered. For exception specification, see documentation of
`ezmlex.patterns.pattern()`.
"""
from ezmlex.patterns import pattern
return pattern(cls.patterns(), *args)
