5 Sep
2008
5 Sep
'08
8:39 p.m.
On Thu, 4 Sep 2008, Ryan Ingram wrote:
Nice. I've written similar stuff a couple of times before, but the formulation using Maybe and modify definitely solves some problems I started to notice as I used it on bigger structures. However, it might be better to separate a class of "never failing" references, where the reader is guaranteed to succeed, from "potentially failing" references which give a Maybe value.
I'd also not use the names "get" and "modify" because they are already used by MonadState. I always used "frGet", "frSet", and "frModify", and then tended to not use them directly as I was generally working in a state monad.
Haskell already supports qualification, why manual prefixing?