Defining new forms

[masak]

Using the Windows executable of the 0.4.0 release:

> (set keys [map car _])
(lit clo nil (_) (map car _))

> (keys forms)
(thread ccc after dyn where if quote (nil))

> (form hello ((e) a s r m)
|   (mev s (cons (append "Hello " e "!") r) m))
<...huge output omitted...>

> (keys forms)
(hello thread ccc after dyn where if quote (nil))

> (hello "world")
undefined variable: hello

> (bel '(hello "world"))
"Hello world!"

I was surprised and happy to see that bel handles this one! 🎉 But arguably the ambient evaluator should, too.