yeanpypa.Optional

Module yeanpypa :: Class Optional

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Class Optional

Rule --+
       |
      Optional

This rule matches its subrule optionally once. If the subrule does not match, the Optional() rule matches anyway.

Method Summary
	`__init__(self, rule)` Initialize the rule with a subrule.
	`__str__(self)` Return a string representation of this rule.
	`match(self, input_reader)` Match this rule against the input.
Inherited from Rule
	`__add__(self, second_rule)` Define an operator to concat two rules.
	`__or__(self, second_rule)` Define an operator to concat two rules via OR.
	`callAction(self, param)` Call the action attached to this rule.
	`hide(self)` Tell this rule to not produce any token output.
	`returnToken(self, token)` Helper function encapsulating the hide()-functionality.
	`setAction(self, action)` Set the action to execute on a rule match.

Method Details

Initialize the rule with a subrule.

Return a string representation of this rule.

Match this rule against the input.

Parameters:: input_reader - The input reader to read from.
(type=InputReader @return A list of token matched by the subrule (or None, if none))

Generated by Epydoc 2.1 on Sat Feb 10 16:11:43 2007