Overload new and delete to not use GC?

[Guillaume Piolat via Digitalmars-d-learn]

On Sunday, 22 May 2016 at 07:35:32 UTC, Rusty wrote:
> I know it's possible to do [explicit object 
> allocation](http://wiki.dlang.org/Memory_Management#Explicit_Class_Instance_Allocation) on the heap, but I find that quite cumbersome.
>
> So.. is it possible to overload 'new' and 'delete' to not use 
> GC?

The way to do it is to use emplace() and destroy() instead.
https://p0nce.github.io/d-idioms/#Placement-new-with-emplace

Unique!T, RefCounted!T, and Scoped!T use emplace() internally.


> Also, it seems many features of the language rely on GC. Is 
> there a definitive list of those?

- new
- Appending and concatenating slices
- Homogeneous template parameters void f(
- Some array literals
- Closures that escape
- other features I don't recall

@nogc lets you avoid all of them and is necessary to avoid 
unintentional allocations.