[Haskell-cafe] Re: GHC predictability

[Andrew Coppin]

Don Stewart wrote:
> ndmitchell:
>   
>>>  2. Does anybody know how to actually read GHC's Core output anyway?
>>>       
>> There is one different from standard Haskell I am aware of. In Core,
>> case x of _ -> 1 will evaluate x, in Haskell it won't. Other than
>> that, its just Haskell, but without pattern matching and only cases -
>> hence the rather high number of cases.
>>     
>
> Well, 'let's too, which bind either unlifted or lifted values.
>
> If they're binding lifted things, that's a thunk being allocated.
>   

See, somebody needs to write all this down - in language comprehensible 
to people who don't already know what an "unlifed value" is. ;-)