offset ( sequence-parser offset -- obj/f )

Vocabulary

sequences.parser

Inputs

sequence-parser	a sequence-parser
offset	an object

Outputs

obj/f

an object or f

Word description

Return the element of the parsed sequence offset from the current position of the parser. Negative offsets will yield already parsed elements.

See also

advance, current, consume, next

Definition

USING: accessors kernel math sequences ;

IN: sequences.parser

: offset ( sequence-parser offset -- obj/f )
    swap [ n>> + ] [ sequence>> ?nth ] bi ; inline