#--
# DO NOT MODIFY!!!!
# This file is automatically generated by rex 1.0.5
# from lexical definition file "lib/puppetdb/lexer.l".
#++

require 'racc/parser'
# vim: syntax=ruby

require 'yaml'

class PuppetDB::Lexer < Racc::Parser
  require 'strscan'

  class ScanError < StandardError ; end

  attr_reader   :lineno
  attr_reader   :filename
  attr_accessor :state

  def scan_setup(str)
    @ss = StringScanner.new(str)
    @lineno =  1
    @state  = nil
  end

  def action
    yield
  end

  def scan_str(str)
    scan_setup(str)
    do_parse
  end
  alias :scan :scan_str

  def load_file( filename )
    @filename = filename
    open(filename, "r") do |f|
      scan_setup(f.read)
    end
  end

  def scan_file( filename )
    load_file(filename)
    do_parse
  end


  def next_token
    return if @ss.eos?
    
    # skips empty actions
    until token = _next_token or @ss.eos?; end
    token
  end

  def _next_token
    text = @ss.peek(1)
    @lineno  +=  1  if text == "\n"
    token = case @state
    when nil
      case
      when (text = @ss.scan(/\s/))
        ;

      when (text = @ss.scan(/\(/))
         action { [:LPAREN, text] }

      when (text = @ss.scan(/\)/))
         action { [:RPAREN, text] }

      when (text = @ss.scan(/\[/))
         action { [:LBRACK, text] }

      when (text = @ss.scan(/\]/))
         action { [:RBRACK, text] }

      when (text = @ss.scan(/\{/))
         action { [:LBRACE, text] }

      when (text = @ss.scan(/\}/))
         action { [:RBRACE, text] }

      when (text = @ss.scan(/=/))
         action { [:EQUALS, text] }

      when (text = @ss.scan(/\!=/))
         action { [:NOTEQUALS, text] }

      when (text = @ss.scan(/~/))
         action { [:MATCH, text] }

      when (text = @ss.scan(/</))
         action { [:LESSTHAN, text] }

      when (text = @ss.scan(/>/))
         action { [:GREATERTHAN, text] }

      when (text = @ss.scan(/not(?![\w_:])/))
         action { [:NOT, text] }

      when (text = @ss.scan(/and(?![\w_:])/))
         action { [:AND, text] }

      when (text = @ss.scan(/or(?![\w_:])/))
         action { [:OR, text] }

      when (text = @ss.scan(/true(?![\w_:])/))
         action { [:BOOLEAN, true]}

      when (text = @ss.scan(/false(?![\w_:])/))
         action { [:BOOLEAN, false]}

      when (text = @ss.scan(/-?\d+\.\d+/))
         action { [:NUMBER, text.to_f] }

      when (text = @ss.scan(/-?\d+/))
         action { [:NUMBER, text.to_i] }

      when (text = @ss.scan(/\"(\\.|[^\\"])*\"/))
         action { [:STRING, YAML.load(text)] }

      when (text = @ss.scan(/\'(\\.|[^\\'])*\'/))
         action { [:STRING, YAML.load(text)] }

      when (text = @ss.scan(/[\w_:]+/))
         action { [:STRING, text] }

      when (text = @ss.scan(/@@/))
         action { [:EXPORTED, text] }

      else
        text = @ss.string[@ss.pos .. -1]
        raise  ScanError, "can not match: '" + text + "'"
      end  # if

    else
      raise  ScanError, "undefined state: '" + state.to_s + "'"
    end  # case state
    token
  end  # def _next_token

end # class