some: 'some' matches 1 or more of pattern 'p'. in BNF notation,...

In chappers/Ramble: Parser Combinator for R

Description

some matches 1 or more of pattern p. in BNF notation, repetition occurs often enough to merit its own abbreviation. When zero or more repetitions of a phrase p are admissible, we simply write p+. The some combinator corresponds directly to this operator, and is defined in much the same way.

Usage

some(p)

Arguments

p	is the parser to match 1 or more times.

See Also

maybe, many

Examples

Digit <- function(...) {satisfy(function(x) {return(grepl("[0-9]", x))})}
some(Digit()) ("123abc")

chappers/Ramble documentation built on May 13, 2019, 3:30 p.m.