- var blocks={};

mixin set(key)
  - blocks[key] = this.block

mixin A(buttonClass, buttonText, disabled)
  button.button(class= buttonClass, disabled= disabled)
    span
      if block
        block
        - blocks.left()
        | #{buttonText}
        - blocks.right()
      else
        | #{buttonText}

+A("button_small button_filled", "Кнопка", false)
  +set('left')
    p l
  +set('right')
    p r