More on C++ stack arrays

Walter Bright newshound2 at digitalmars.com
Sun Oct 20 12:27:47 PDT 2013


On 10/20/2013 12:15 PM, David Nadlinger wrote:
>> I'm not particularly enamored with the compiler inserting silent copying to
>> the heap - D programmers tend to not like such things.
>
> Well, this is exactly what happens with closures, so one could argue that there
> is precedent.

Not at all. The closure code does not *copy* the data to the heap. It is 
allocated on the heap to start with.


> I also find this pattern to be very useful. The LLVM support libraries even
> package it up into a nice llvm::SmallVector<T, n> template that allocates space
> for n elements inside the object, falling back to heap allocation only if that
> threshold has been exceeded (a tunable small string optimization, if you want).

Nice!



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