Implement #lang with application form

[pdarragh]

It'd be fun to make #lang lambda-vc where the #%app form is overridden so users do not need to use interp or quotation.

[sorawee]

Overriding #%app doesn't need a new #lang FWIW.

#lang racket

(module foo racket
  (provide (rename-out [app #%app]))
  (define-syntax-rule (app xs ...)
    (#%app xs ... 42)))

(require 'foo)

(+ 1 2 3) ; 48

[pdarragh]

Oh! Yes, it isn't necessary but I think I would like to maintain the more manual interp form when just doing (require lambda-vc) and leave a #%app override for #lang lambda-vc for clarity of intent. But you've certainly given me something to get started with, so maybe this week I'll implement this. Thank you for the interest!