Arc Forumnew | comments | leaders | submitlogin
1 point by almkglor 5947 days ago | link | parent

  (require "ssyntaxes.arc")
  (def foo! (x)
    (= (car x) 42))
  (= hmm '(3))
  foo!.x
Well, it has to do with the ssyntaxes.arc precedence rules and how they work: basically, split according to the current ssyntax, then go to next ssyntax. Since #\. is listed before #\!, symbols are first split by #\. into (foo! x), so it works properly.

It won't work with a type that ends in ! and if you use the ? ssyntax:

  (def my-type! (x)
    (annotate 'my-type! x))
  (my-type!? my-type!.1) ; will transform to (my-type '?)