Diff between function and delegate

[Mathias Lang via Digitalmars-d-learn]

On Monday, 27 June 2016 at 19:34:06 UTC, "Smoke" Adams wrote:
> I have
>
> alias fnc = void function(Object);
> alias del = void delegate();
>
> Does func avoid the GC? I am passing in this to Object so I 
> don't technically need a delegate or a "context". I want to be 
> sure that I'm actually gaining something here by doing this.
>
> I read somewhere that delegates only require the GC when they 
> use objects outside their scope. Do delegates always use the GC 
> or only in certain cases?

Delegate don't GC allocate when:
- You take a pointer to a member function
- The function accept a `scope` delegate and you pass a literal
- You use `scope myDG = (Params) { body... }`