How to with-self-yield in initialize?

[stugol]

I don't seem to be able to with self yield in an initialize or new function...?

See https://play.crystal-lang.org/#/r/q4p and https://play.crystal-lang.org/#/r/q4q

[JacobUb]

I don't know about the first one. The second, though: https://play.crystal-lang.org/#/r/q50

[bcardiff]

It could be added, but it will force the type inference to quit some calculations because it will be exposing an object not "completely initialized"

https://play.crystal-lang.org/#/r/q4y

@Exilor workaround is better than the one I was going to post :+1:

[stugol]

@Exilor: Awesome, thank you! Although I'm not sure I understand how it works. Why doesn't the call to new cause an infinite recursion?

[JacobUb]

Because classes have a default new that doesn't yield, and the one I added does. Methods that yield are different from methods that have the same name, the same arguments but don't yield.

[stugol]

@Exilor: Oh, of course!

[vladfaust]

Bumping up. Is that somehow achievable?

class Router
  def initialize(&block)
    with self yield
  end

  def get(path)
  end
end

Router.new do
  get "/"
end

# undefined method 'get'

I currently have to write

Router.new do |r|
  r.get "/"
end

which is kinda overhead.

[asterite]

class Router
  def self.new
    with Router.new yield
  end

  def initialize
  end

  def get(path)
  end
end

Router.new do
  get "/"
end