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[racket-dev] Should I expect this program to typecheck?

From: Neil Toronto (neil.toronto at gmail.com)
Date: Mon Aug 6 16:12:53 EDT 2012		 
#lang typed/racket

(: vector-first (All (A B) ((U (Vectorof A) (Vectorof B)) -> (U A B))))
(define (vector-first vs)
   (vector-ref vs 0))


I can't think of a reason this shouldn't work, but I may not be taxing 
my imagination enough to come up with one.

Neil ⊥
Posted on the dev mailing list.