On 29.05.2012 21:04, Andrej Mitrovic wrote:
On 5/29/12, Dmitry Olshansky<[email protected]> wrote:
I'm reiterating prior info on the subject and provide some motivating
examples. For those convinced of necessity of virtual function templates
already - skip to the bottom ;)
I've run into an issue like this, currently I use this sort of workaround:
class Base
{
abstract void run();
void runAll(this Child)(Child ch)
{
foreach (i; 0 .. 10) // demo
ch.templateMethod(i);
}
}
class Child : Base
{
override void run()
{
runAll(this);
}
void templateMethod(T)(T t) { }
}
void main()
{
auto ch = new Child;
ch.run();
}
Would this work if say:
Base ch = new Child;
ch.run();
Since all this template this parameter stuff is arcane to me :)
In any event it look like doing hand-written thunks. And that's clear
indication to me that it needs a better hook in compiler.
All subclasses of Base need to implement 'templateMethod', but it has
to be a templated function. Unfortunately that means it can't be
virtual so I'm using a 'this' template parameter in a base function
that has to be called. Not very pretty!
The bloat is the same, and even some extra call overhead if I'm not
mistaken.
--
Dmitry Olshansky
