grammatica.grammar.DerivationRule

class grammatica.grammar.DerivationRule(symbol, value)

Derivation rule that expands to a expression (grammar).

Non-terminal symbol and an expression separated by a metasymbol (e.g. ‘symbol ::= expression’).

Parameters:

• symbol (str) – Symbol (non-terminal) for the derivation rule.

• value (Grammar) – Grammar the symbol derives into.

Attributes

symbol	Symbol (non-terminal) for the derivation rule.
value	Grammar the symbol derives into.
separator	Separator metasymbol to use for the derivation rule.

Methods

as_string([indent])	Return a string representation of the grammar.
attrs_dict()	Return instance attributes of the grammar.
copy()	Create a copy of the grammar.
equals(other[, check_quantifier])	Check equality with another value.
render([full, wrap])	Render the grammar as a regular expression.
simplify()	Simplify the grammar.