From: Christian Surlykke on 20 Mar 2010 14:38 [Note: parts of this message were removed to make it a legal post.] Kanocc (Kanocc Ain't NO CompilerCompiler) 0.2.0 is released. (Actually it was released a few months ago, but it only recently occurred to me that I could/should announce i here. Sorry...) What is it: Kanocc is a syntax recognition framework for Ruby. It emphasizes seamless integration with Ruby, utilizing Ruby's flexible syntax. Kanocc is available as a gem. Visit http://kanocc.rubyforge.org to find documentation and downloads. To get a little taste of Kanocc, here's an example: An interpreter for simple arithmetic expressions could be done like this: require "rubygems" require "kanocc" class Number < Kanocc::Token attr_reader :val pattern(/\d+/) { @val = @m[0].to_i} end class Expr < Kanocc::Nonterminal attr_reader :val rule(Expr, "+", Expr) { @val = @rhs[0].val + @rhs[2].val} rule(Expr, "", Expr) { @val = @rhs[0].val  @rhs[2].val} rule(Expr, "*", Expr) { @val = @rhs[0].val * @rhs[2].val}; precedence 1 rule(Expr, "/", Expr) { @val = @rhs[0].val / @rhs[2].val}; precedence 1 rule("(", Expr, ")") { @val = @rhs[1].val} rule(Number) {@val = @rhs[0].val} end myParser = Kanocc::Kanocc.new(Expr) puts myParser.parse('3 + 4  2').val puts myParser.parse('8  2 * 3').val puts myParser.parse('8  (4  2)').val If this doesn't make any sense at all, you may have to read the documentation :) Feedback is most welcome. br. Christian Surlykke.

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