One pattern that I have frequently used in EMACS elisp is that redefining a top-level value overwrites that value rather than shadowing it. Basically hot reloading. This doesn't work in a dependently typed context as the type of subsequent definitions can depend on values of earlier definitions.
def t := string
def x: t := "asdf"
redef t := int
Excluding the type-level debugging they mention, I think a lean style language-server is a better approach. Otherwise you are basically using an append-only ed to edit your environment rather than a vi.
def a := 1
def f x := a * x
-- at this point f 1 evaluates to 1
redef a := 2
-- at this point f 1 evaluates to 2
I used this to write the front end for an ATM machine.
- Static typing a la Haskell with Coalton in Common Lisp
- Dependent typing with Deputy in Clojure (this post)
- The Common Lisp compiler SBCL ported to the Nintendo Switch
- Common Lisp and AI/deep learning
- A special retrospective on Modula and Oberon
- Many lightning talks.
Peter Norvig, 1992
Paradigms of AI Programming: Case Studies in Common Lisp
https://en.m.wikipedia.org/wiki/Peter_Norvig
it's no coincidence Google is actively maintaining sbcl, either.
And it is called that for a reason, it is not very dynamic :) and probably too static to the taste of many Lisp and all Smalltalk fans.
Lisp was the de facto language of artificial intelligence in the U.S. for many years. Apparently Prolog was popular in Europe (according to Norvig's PAIP)
droideqa•1y ago
The only hint is this repo[0] referenced in the paper.
[0]: https://gitlab.com/fredokun/deputy
agumonkey•1y ago