[Haskell-cafe] Enable -Wall by default?

[Joachim Durchholz]

I generally agree that a lot is subjective, but I believe this one is not:

Am 10.12.20 um 20:46 schrieb Albert Y. C. Lai:
> I make unused binds because it's future-proof---perhaps I 
> will actually use it in the next version?  Editing from
> 
> (p, _q) = f x
> 
> to
> 
> (p, q) = f x
> 
> produces noise in diffs and commits, no?

No, that's not noise, it's a reminder that _q is now being used.
Sure, there will also be other changes in the function's body. Still, a 
single-change noise isn't much concern.

Well okay. If your diff tool does only by-line diffs and not by-word or 
by-character diffs, then yeah it's annoying.
This used to be a serious problem a view years ago. Not anymore today 
I'd say, word diffs are pretty commonplace nowadays.

> Some of you are against noisy 
> diffs and commits, no?  Then embrace unused binds!

Noise in the always-the-same place isn't much of a hassle actually.
At some point I even started to notice the *absence* of some noise and 
got alerted to a mistake.

YMMV :-)

> 2. In fact, I go so far as adding -fdefer-type-errors during the first 
> 99% of a development cycle.  Why?  Because ghci is so much more 
> informative when :load succeeds.

Will -Wall prevent :load?
If not, this particular argument is beside the point.

Just my 2 cents.

Regards,
Jo