[fpc-devel] Nested function closures

[Ryan Joseph]

> On Apr 27, 2021, at 12:10 PM, Sven Barth via fpc-devel <fpc-devel at lists.freepascal.org> wrote:
> 
>> So as Sven wrote, you would be duplicating effort, needlessly, since it has
>> to work always... If the compiler can decide that the heap interface is not
>> needed and optimize it away: so much the better. But I doubt this will be
>> possible.
> 
> In nearly all cases the interface can't be optimized away.

So as you showed it's not as bad as I thought, which is good, however my point was that in my scenario, which I argue is indeed very common, it could be implemented as a "nested anonymous function". My reasons:

1) Nested functions already exist and merely need an anonymous parser to be implemented (as I already did in that branch).
2) The interface is literally 100% useless as the object is never passed outside of the receiver (SortEntities). It will be created and destroyed with absolutely no value to the program whatsoever.

Regards,
	Ryan Joseph