[Haskell-cafe] If wishes were horses... (was: Re: definition of sum)

wren ng thornton wren at freegeek.org
Fri Mar 12 00:42:05 EST 2010

David Leimbach wrote:
> Note that foldl' has a ' to indicate that it's not the same as foldl
> exactly.  I would propose that sum' exist as well as sum, and that sum be
> lazy.

I wish Haskell allowed ! to occur (non-initially) in alphanum_' 
identifiers as well as in symbolic ones. Then we could be more 
consistent about having ! mean strictness like it does with ($!), bang 
patterns, strict fields,... (too bad about (!) and (!!)). The prime has 
so many other uses, it's a shame it gets used up for strict/lazy 
variants, as if there were no other variations.

Live well,

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