[racket] Locating substring with reserved characters

From: Jukka Tuominen (jukka.tuominen at finndesign.fi)
Date: Sat Sep 3 03:56:18 EDT 2011

Hi all,

I'm trying to locate a substring that I want to be treated just as a string
rather than regexpr notation. The used strings are dynamic and there's no
control over their content. This is propably something simple, but I can't
seem to get it right.

Any ideas?

#lang racket

(regexp-match-positions* (pregexp "5 (+ 1 2 3)") "((named-lambda (plus x y)
(+ x y)) 5 (+ 1 2 3))")
;>> error: regexp: `+' follows nothing in pattern

br, jukka

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