>> So... any associative operation then?
>
> yes. because associativity is the property that you are using in the
> reordering.
I guess most people just instinctively "know" that addition and
multiplication are associative (not to mention commutative) without
thinking about it too deeply.
>>> BTW Why did you choose this example with such a lot or irrelevant
>>> detail?
>>
>> My brain is like mush this morning. This was the first correct example
>> I could find. It's about 10 years ago that I discovered this effect,
>> so I wasn't even sure if I was remembering right!
>
> I think that as soon as you find an example you try to reduce it to the
> bare essentials and post that. The same actually as when posting a bug.
Ooo, 2 extra operations. Big deal.
>> (Currently attempting to build a Haskell parser, printer and type
>> interence engine.
>
> One word: why?
Two words: why not?
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