Rule and subrule options

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option

description

k

Specify the exact lookahead to be used by the subrule.

greedy

Valid values are true and false. Default is true. Normally symbols are matched greedily so that if a symbol can be matched immediately or by exiting the subrule the parser chooses to match the symbol immediately.

backtrack

Rule-specific version of the backtrack grammar option. See Grammar options for details.

memoize

Rule-specific version of the memoize grammar option. See Grammar options for details.