from Hacker News

Parsing – REBOL Users Guide

by vmorgulis on 2/9/17, 7:56 PM with 26 comments

• by QuantumAphid on 2/9/17, 8:29 PM

  More than a decade later, Rebol (and its newer offspring Red red-lang.org) are still in regular use on my team.

  A cool thing about Rebol's (and Red's) PEGs are that they can easily parse and process the diverse datatypes of its parent source.

  REBOL Parser in 10 Lines http://www.rebol.net/cookbook/recipes/0042.html

  And:

  http://blog.hostilefork.com/why-rebol-red-parse-cool/ "But even more impressively, it can work on the symbolic structure of code itself. While Rebol and Red are both like Lisp in being homoiconic, when you see something like PARSE applied on code itself... you know you're looking at something very cool."

• by rebolek on 2/9/17, 9:04 PM

  Red [1] is language based on Rebol that among other things improves PARSE dialect [2]

  [1] http://www.github.com/red/red

  [2] http://www.red-lang.org/2013/11/041-introducing-parse.html

• by wcummings on 2/9/17, 11:59 PM

  Reminds me of perl6. Why don't more languages support grammars like this?

  Fun example: https://github.com/perl6/perl6-examples/blob/master/categori...

• by jgalt212 on 2/10/17, 12:15 PM

  The designer of REBOL, not surprisingly, is a pretty interesting and impressive fellow.

  https://en.wikipedia.org/wiki/Carl_Sassenrath