How does Padrino map :index to '/'?

Question

I'm curious how Padrino accomplishes mapping:

get :index do

to:

get '/' do

I'm having trouble finding it in the source.

Answer 1

It simply overrides the get method, i.e.:

alias old_get get

def get(path)
  if path == :index
    old_get '/'
  else
    old_get path
  end
end