Getting completely (I mean ENTIRELY) rid off GC
Daniel Alves via Digitalmars-d
digitalmars-d at puremagic.com
Thu Sep 11 11:32:09 PDT 2014
You know, currently I spend most of my time programming in ObjC,
but I really love C, C++ and D.
Since the Clang Compiler, ObjC dropped the GC entirely. Yes,
that's right, no GC at all. And, in fact, it does support
concurrent programming and everything else. The magic behind it
is ARC - Automated Reference Counting
(http://clang.llvm.org/docs/AutomaticReferenceCounting.html): the
compiler analyzes your code, figures out object scopes and sets
the correct calls to retain/release/autorelease (for those who
are not familiar with ObjC, pointers are mostly reference
counted). So there is no need for a GC and all its complications.
In addition to that, Rusty also has an approach like ObjC called
Region Pointers and objects' Lifetime
(http://doc.rust-lang.org/guide-pointers.html#boxes). The idea is
the same, but, depending on the type of the pointer, the compiler
may add a call for freeing or for decrementing a pointer
reference counter.
Finally, it looks like there is a language called Cyclone that
goes the same way (paper here:
http://www.cs.umd.edu/projects/cyclone/papers/cyclone-regions.pdf)
Since I read Andrei's book, D Programming Language, I've been
asking myself why D does not go this way...
Anyone knows about a good reason for that?
On Thursday, 11 September 2014 at 18:04:06 UTC, Andrey Lifanov
wrote:
> Thank you all for replies!
>
> I'm not saying that GC is evil. I just want to have different
> options and more control, when this is required. If D offered
> such choice, many good C++ programmers would have certainly
> considered D as a perfect alternative to C++.
>
> D states that there is no strict and dogmatic rules that it
> follows about programming languages paradigms. And that it is a
> general purpose language. So I think it would be nice to have
> more options of how we can manage memory.
>
> I will continue investigation and certainly inform you if it
> ends with something useful.
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