[Issue 5710] cannot use delegates as parameters to non-global template

[d-bugmail at puremagic.com]

https://d.puremagic.com/issues/show_bug.cgi?id=5710



--- Comment #31 from Martin Nowak <code at dawg.eu> 2013-11-18 13:58:12 PST ---
(In reply to comment #29)
> #1 is necessary for the multiple-context delegates. But applying same rule for
> existing one-context delegates will add hidden runtime cost against existing
> code.
For single context it's
  dg.ptr = cast(void*)c;
For multi-context pointer it's
  void*[2] __ctxt = [cast(void*)c, funcThis];
  dg.ptr = cast(void*)&__ctxt;

And yes, if the delegate escapes the scope the __ctxt becomes a closure
variable and is heap allocated (dg.ptr will point into the heap).

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