On Monday, 2 September 2019 at 12:43:31 UTC, berni wrote:
I need to pass the delegate add_new_way somehow to opApply.
Here I managed this, by adding this delegate to the
remove-delegate and safe it away for further use. This works,
because if remove is never called, add_new_way is not used
either. But it's a little bit awkward. Is there a better way,
to achieve this? (Note 1: In the real world, point%2==1 is a
more complex function call. Note 2: The order of elements in
Way[] way doesn't matter, if that makes things easier.)
The delegate that gets passed to opApply is constructed from the
body of the foreach loop; you don't (normally) pass it explicitly.
If you have an existing delegate that you want to use with
opApply, the easiest way is like this:
void delegate(Thing) myDelegate = ...;
foreach(thing; things) {
myDelegate(thing);
}
// Equivalent to: things.opApply((Thing t) => myDelegate(t))
