On Wed, 18 Apr 2012 17:07:07 -0400, Xan <xancor...@gmail.com> wrote:
Hi,
I want to know what is most interesting for me: delegates or functions.
I consulted sources but none say the practical consequences of such
election.
What can I do and what can't I do with functions and delegates?
Please, be didactics, I'm a newbee
In my experience, delegates are the more useful type to *store*. I've
implemented this in some places:
int delegate(int) stored_dg;
void setDelegate(int delegate(int) dg) { stored_dg = dg; }
void setDelegate(int function(int) fn) { stored_dg =
std.functional.toDelegate(fn); }
On the whole, delegates are slightly more expensive to call, but not by
much. However, a function converted to a delegate pays the penalty of a
double call, because it takes a call to strip out the context pointer. I
wish there was a more straightforward way to do this...
But I've not seen this be a huge factor -- yet.
-Steve
