class Unparser::Emitter::Repetition

def dispatch
  if postcontrol?
    emit_postcontrol
  else
    emit_normal
  end
end

def emit_keyword
  write(MAP.fetch(node.type), ' ')
end

def emit_normal
  emit_keyword
  visit(condition)
  if body
    emit_body(body)
  else
    nl
  end
  k_end
end

def emit_postcontrol
  visit(body)
  ws
  emit_keyword
  visit(condition)
end

def postcontrol?
  body && local_variable_scope.first_assignment_in?(body, condition)
end