[racket] Puzzled about type inference

From: Alexander D. Knauth (alexander at knauth.org)
Date: Tue Aug 5 18:13:13 EDT 2014

On Aug 5, 2014, at 6:06 PM, Raoul Duke <raould at gmail.com> wrote:

>>>      add type declarations to variables and fields and function and method signatures.
>> A good motto, which I shall endeavour to remember.
> what i do not get about TR and other languages (ocaml, haskell, etc.)
> is: there are these rules of thumb that you must somehow learn to keep
> yourself out of the weeds, but you only get to learn them the long and
> hard way. why don't the runtimes/ides
> (1) have a switch that says "hey, force me, the user, to put in type
> annotations by hand in the critical places, ok? so i don't have to
> suffer so much down the road, ok?"
> (2) put the inferred annotations into the code as it goes along so i
> can see what kind of crazy talk the inference engine is having with
> itself?

I’m just wondering, would it be possible for DrRacket to do something where you can right-click a variable or expression or something and one of the options is to see what the inferred type is?  

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