[Haskell-cafe] Does the GHC GC handle const application?

[Tom Ellis]

On Mon, May 30, 2016 at 08:13:41PM -0400, David Feuer wrote:
> If I create a thunk representing
> 
> const x y
> 
> will the garbage collector be sure to replace this with x?

Not until it's evaluated, no.

> I'm just wondering if I have to be concerned about the fact that
> Data.Sequence defines update in terms of adjust, with
> 
> update x = adjust (const x)

Could you say more about your concern?