play.cr

class Node
end

class FooNode < Node
end

class BarNode < Node
end

class Parser
  @foo = ""

  def method_names
    {{
      @type.methods.map do |v|
        v.name.stringify + ":" + (v.args.map &.restriction.stringify).join(",")
      end
    }}
  end

  def transform(node : FooNode)
  end

  def transform(node : BarNode)
  end
end

parser = Parser.new
parser.method_names