[Haskell-cafe] Library for overloaded indexing (a la (!))

[Tom Ellis]

On Thu, Aug 13, 2015 at 11:36:01PM -0700, William Yager wrote:
> Alright, so we've established how to replicate (!) and (!?) using lens;
> what about (!!) and (!!?)? Those were the ones that gave me typing trouble.

Can't you just define an indexed getter for the particular case you care
about?