from-m-to-n ( parser m n -- parser' )

Vocabulary

peg.parsers

Inputs

parser	a parser
m	an integer
n	an integer

Outputs

parser'

a parser

Word description

Returns a parser that matches between and including m to n repetitions of the input parser.

Examples

USING: peg peg.parsers prettyprint ; "aaa" "a" token 3 4 from-m-to-n parse .
V{ "a" "a" "a" }

USING: peg peg.parsers prettyprint ; "aaaa" "a" token 3 4 from-m-to-n parse .
V{ "a" "a" "a" "a" }

USING: peg peg.parsers prettyprint ; "aaaaa" "a" token 3 4 from-m-to-n parse .
V{ "a" "a" "a" "a" }

See also

exactly-n, at-most-n, at-least-n

Definition

USING: kernel math peg peg.parsers.private ;

IN: peg.parsers

: from-m-to-n ( parser m n -- parser' )
    [ [ exactly-n ] 2keep ] dip swap - at-most-n 2seq
    [ flatten-vectors ] action ;