A really hacky proof-of-concept of how to model template abstraction by multi-block helper functions.

gistfile1.rb

class Box
  def parse(title, &block)
    puts "<box>"
    puts "<title>#{title}</title>"
    block.call(Column.new).parse
    puts "<box>"
  end
end

class Column
  def first(&content)
    @first = content
  end

  def second(&content)
    @second = content
  end

  def third(&content)
    @third = content
  end

  def parse
    puts "<col1>#{@first.call}</col1>"
    puts "<col2>#{@second.call}</col2>"
    puts "<col3>#{@third.call}</col3>"
  end
end

Box.new.parse "Neues" do |col|
  col.second do
    "content of col 2"
  end
  col.first do
    "content of col 1"
  end
  col.third do
    "content of col 3"
  end
  col
end