question, dsl with method_missing and self yield

[kostya]

i am trying to build dsl: http://play.crystal-lang.org/#/r/jzg
is it possible to make with self yield understand method_missing?

something like ruby instance_eval(block)

[asterite]

I think we could make this work. At least it makes sense to work that way, if methods are first looked up in the with scope. However, the ends_with?('=') condition in your example will never be true because doing a = 1 is a local variable assignment, and then if you do self.a = 1, self is not bound to the with scope. That is, with ... yield is not like Ruby's instance_eval.

[kostya]

in ruby the same a = 1, would be local variable, but a 1 is method call

[asterite]

Yes, what I meant is that there's no way to invoke a method that ends_with?('=') if you use with ... yield.