class Transform

# File lib/terrascript.rb, line 5
def initialize(inFd, outFd = $stdout)
  @in = inFd
  @out = outFd
  @mode = :read
  @argName = "block"
  @arg = ""
  @body = ""
  @depth = 0
end

# File lib/terrascript.rb, line 15
def process
  @in.each do |line|
    processLine line
  end
end

# File lib/terrascript.rb, line 38
          def keyword?(line, s)
  line.lstrip.start_with? ("@" << s)
end

# File lib/terrascript.rb, line 42
          def processLine(line)
  case @mode

  when :read
    case
    when keyword?(line, "inline")
      args = line.split(' ')
      if !args[1].nil?
        @argName = args[1]
      end
      @mode = :body
    else
      @out.puts line
    end

  when :arg
    case
    when keyword?(line, "end")
      if @depth == 0
        transform
        @arg = ""
        @body = ""
        @mode = :read
      else
        @depth = @depth - 1
        @arg << line
      end

    when keyword?(line, "inline")
      @depth = @depth + 1
      @arg << line

    else
      @arg << line
    end

  when :body
    @body << line
    if line.lstrip.start_with?("return")
      @mode = :arg
    end

  end
end

# File lib/terrascript.rb, line 21
          def transform
  s = $stdout
  $stdout = @out

  # process nested directives
  if @arg.include? "@inline"
    stream = StringIO.new(@arg)
    outStream = StringIO.new
    Transform.new(stream, outStream).process
    @arg = outStream.string
  end

  eval("lambda { |#{@argName}|\n#{@body}\n}").call(@arg)

  $stdout = s
end