Kick it off with a bang.

.gitignore

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+*.rbc
+*.gem
+.bundle
+Gemfile.lock
+pkg/*

Gemfile

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+source "http://rubygems.org"
+
+gemspec
+
+gem "rake",   ">= 0.8.7"
+gem "kpeg",   "~> 0.8.2"
+gem "mspec",  "~> 1.5.17"

LICENSE

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+Copyright (c) 2011 Brian Ford. All rights reserved.
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the "Software"), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.

README

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+A native implementation of CoffeeScript [1] that runs on the Rubinius VM [2].
+
+Q. Whence comes the name Poetics?
+A. Poetics is a partial anagram of the word CoffeeScript. It is also a nod to
+   Jeremy Ashkenas, the author of CoffeeScript, and his interest in code as
+   literature.
+
+Q. Why a native implementation?
+A. CoffeeScript is an interesting language in its own right. Rather than
+   merely being a syntax layer on top of Javascript, and bound to expressing
+   its semantics in those of Javascript, it deserves its own implementation.
+   Many of the reasons to use CoffeeScript in Node.js would also apply to
+   using this native implementation.
+
+
+Installation
+
+First, install Rubinius:
+
+  1. Using RVM (http://rvm.beginrescueend.com).
+
+    rvm install rbx
+
+  2. Or directly (http://rubini.us/doc/en/what-is-rubinius/). 
+
+Second, install Poetics:
+
+    rbx -S gem install poetics
+
+
+Running Poetics
+
+Poetics provides a REPL for exploratory programming or runs CoffeeScript
+scripts.
+
+    rbx -S poetics -h
+
+
+Getting Help
+
+Poetics is a work in progress. If you encounter trouble, please file an issue
+at https://github.com/brixen/poetics/issues
+
+
+Contributing
+
+If you find Poetics interesting and would like to help out, fork the project
+on Github and submit a pull request.
+
+
+People
+
+Poetics was created by Brian Ford (brixen) to force him to really learn
+Javascript and CoffeeScript.
+
+<add your name here>
+
+
+License
+
+Poetics is MIT licensed. See the LICENSE file.
+
+
+Credits
+
+Jeremy has created an very interesting language in CoffeeScript. This
+implementation steals bits and pieces from other projects:
+
+Rubinius (https://github.com/evanphx/rubinius/)
+KPeg (https://github.com/evanphx/kpeg/)
+Atomy (https://github.com/vito/atomy/)
+Poison (https://github.com/brixen/poison/)
+Talon (https://github.com/evanphx/talon/)
+
+
+[1] CoffeeScript (http://jashkenas.github.com/coffee-script/)
+[2] Rubinius (http://rubini.us)

Rakefile

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+require 'bundler'
+Bundler::GemHelper.install_tasks
+
+task :default => :spec
+
+base = File.expand_path '../lib/poetics/parser', __FILE__
+
+grammar = "#{base}/poetics.kpeg"
+parser  = "#{base}/parser.rb"
+
+file parser => grammar do
+  sh "rbx -S kpeg -f -s #{base}/poetics.kpeg -o #{base}/parser.rb"
+end
+
+desc "Convert the grammar description to a parser"
+task :parser => parser
+
+desc "Run the specs (default)"
+task :spec => :parser do
+  sh "mspec spec"
+end

lib/poetics.rb

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+require 'poetics/version'
+require 'poetics/syntax'
+require 'poetics/parser'

lib/poetics/parser.rb

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+require 'poetics/parser/parser'
+
+class Poetics::Parser
+  include Poetics::Syntax
+
+  def self.parse_to_sexp(string)
+    parser = new string
+    unless parser.parse
+      parser.raise_error
+    end
+
+    parser.result.to_sexp
+  end
+
+  attr_reader :line, :column
+
+  def position(line, column)
+    @line = line
+    @column = column
+  end
+end