On Wednesday, 27 May 2015 at 15:30:28 UTC, Steven Schveighoffer
wrote:
On 5/27/15 9:11 AM, "Simon =?UTF-8?B?QsO8cmdlciI=?=
<[email protected]>" wrote:
On Wednesday, 27 May 2015 at 14:58:39 UTC, drug wrote:
Do you want to dynamically change priority?
Actually yes. In my actual code I am not using a RedBlackTree
but my own
Container (a heap with the possibility to modify elements
inside), which
is notified when prio changes so it can do a (local)
reordering.
It would be a very bad idea to change prio if the RBTree is
constructed already (and if this works).
Why prio is outside of your predicate?
Well, how would I get it into the lambda? In C++ I would use a
comparision class, and the constructor of the container would
take an
instance of that class. But D's RedBlackTree-constructor does
not take
such a (run-time) argument. And I dont see a way to get prio
into the
predicate, which is a template-argument.
This is true, RedBlackTree does not take a functor as a
parameter to the constructor, it just uses an alias.
This should work if your RedBlackTree is scoped inside a
function where the data exists. But at the time of declaration
inside the class, the instance of prio doesn't exist, so you
can't alias it.
It would be a good enhancement I think to add support for
function objects.
-Steve
I thought unaryFun *does* work with all callables, including
structs/classes with opCall?
