Hi
> How controversial would a proposal to {-# DEPRECATE fromJust #-} be, in
> favour of:
>
> Just _ = x -- which will give you the precise line number
> It seems to me this is one cause of mysterious newbie errors we
> could easily discourage, with little harm.
Btw, I'm not seriously suggesting removing it ;)
It could be discouraged ever so slightly in the haddocks though.
I strongly disagree. If we are removing things that confuse newbies
why not start with higher rank types, MPTC's and GADT's ;)
fromJust is simple, useful and clear. What you mean is that
implementations aren't very good at debugging this. It seems unfair to
blame partial functions for the lack of a debugger. If a call stack
was automatically output every time a fromJust failed would this even
be something people complained about?
Thanks
Neil
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