then: 'then' combinator corresponds to sequencing in BNF. The...

In Ramble: Parser Combinator for R

Description

%then% is the infix operator for the then combinator, and it is the preferred way to use the then operator.

Usage

then(p1, p2)

Arguments

p1	the first parser
p2	the second parser

Value

recognises anything that p1 and p2 would if placed in succession.

See Also

alt, thentree

Examples

(item() %then% succeed("123")) ("abc")

Example output

$result
$result[[1]]
[1] "a"

$result[[2]]
[1] "123"


$leftover
[1] "bc"

Ramble documentation built on May 1, 2019, 7:17 p.m.