grammar

errors.txt

1.9.3-p0 :002 > Crimson::Parser.parse('nil')
Exception: Parse error: Expected one of -, 0, nil at line 1, column 4 (byte 4) after .
	from /Users/jnh/Dev/Toys/CrimsonScript/lib/crimson/parser.rb:12:in `parse'
	from (irb):2
	from /Users/jnh/.rvm/rubies/ruby-1.9.3-p0/bin/irb:16:in `<main>'
1.9.3-p0 :003 > Crimson::Parser.parse('0')
Exception: Parse error: Expected one of -, 0, nil at line 1, column 2 (byte 2) after .
	from /Users/jnh/Dev/Toys/CrimsonScript/lib/crimson/parser.rb:12:in `parse'
	from (irb):3
	from /Users/jnh/.rvm/rubies/ruby-1.9.3-p0/bin/irb:16:in `<main>'
1.9.3-p0 :004 > Crimson::Parser.parse('1')
Exception: Parse error: Expected one of -, 0, nil at line 1, column 2 (byte 2) after .
	from /Users/jnh/Dev/Toys/CrimsonScript/lib/crimson/parser.rb:12:in `parse'
	from (irb):4
	from /Users/jnh/.rvm/rubies/ruby-1.9.3-p0/bin/irb:16:in `<main>'

grammar.treetop

module Crimson

  grammar Grammar

    include Crimson::Literals

    # Literals

    rule literal
      decimal_integer_literal / nil_literal <Literal>
    end
  
    rule nil_literal
      "nil" <NilLiteral>
    end

    rule decimal_integer_literal
      '-'? [1-9] [0-9]* / '0' <IntegerLiteral>
    end

  end

end