https://github.com/ds26gte/pregexp

https://github.com/ds26gte/pregexp

Last synced: about 1 month ago
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• Host: GitHub
• URL: https://github.com/ds26gte/pregexp
• Owner: ds26gte
• License: other
• Created: 2014-08-22T16:27:38.000Z (about 10 years ago)
• Default Branch: master
• Last Pushed: 2024-01-16T03:24:46.000Z (10 months ago)
• Last Synced: 2024-05-23T04:48:50.056Z (6 months ago)
• Language: Scheme
• Size: 54.7 KB
• Stars: 27
• Watchers: 7
• Forks: 8
• Open Issues: 3
• Metadata Files:
  • Readme: README.adoc
  • Changelog: history
  • License: COPYING

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README

        
= pregexp

pregexp is a portable implementation of regular expressions

(regexps) that runs in any R5RS- or R4RS-compliant implementation

of the programming language Scheme, and in Common Lisp.  The regexp

notation supported is compatible with Perl’s, and includes such

powerful directives as

- numeric quantifiers

- non-greedy quantifiers

- POSIX character classes

- non-capturing clusters (in addition to the usual capturing kind)

- selective (i.e., per-cluster) case-insensitivity

- selective space-insensitivity (with provision for comments)

- backreferences

- alternation

- backtrack pruning

- lookahead (positive and negative)

- lookbehind (positive and negative)

This is in addition to the more basic directives

familiar to all regexp users.

== For Scheme

Simply load the file `pregexp.scm` into your Scheme.

Alternatively, if your dialect allows it, you can install pregexp

as a module — consult the file

link:INSTALL.adoc[].

However you load pregexp, you will now have access to the

procedures

- `pregexp`

- `pregexp-match-positions`

- `pregexp-match`

- `pregexp-split`

- `pregexp-replace`

- `pregexp-replace*`

The use of these procedures is described fully and with examples

in the pregexp manual.

== For Common Lisp

`pregexp.lisp` is a Common Lisp implementation of the same

routines as in `pregexp.scm`, with the same behavior (modulo

transparent stuff like `nil` being the CL equivalent of `#f`).

== Documentation

The pregexp manual is at

http://ds26gte.github.io/pregexp/index.html.

❧❧❧

—Dorai Sitaram