On Thursday, 21 September 2017 at 20:32:38 UTC, Jean-Louis Leroy
wrote:
It did not take long! Someone tried to create templatized open
methods and it didn't work right of the box. I expected that,
but in fact there may be a bit of hope. You cannot have virtual
function templates in C++ or in D because the layout of the
vtables have to be known at compile time - but openmethods
creates its method tables at runtime so maybe it can be made to
work.
I stumbled upon a problem very quickly: it seems that classes
that come from class template instantiations are not registered
in ModuleInfo - see below,
[...]
Neither 'Bar!int' nor 'BarInt' appear in 'localClasses'.
Ideas?
Yeah. You can setup a custom registry that maps names to their
TypeInfo_Class.
I do something similar in iz (though the real point in iz is a
GC-free factory but the principle of the registry would be the
the same for you)
Example:
---
/+ dub.sdl:
name "dub_script"
dependency "iz" version="0.6.0"
+/
module dub_script;
import iz.memory, std.stdio;
class Foo(T){this(){writeln("fooDeInt");}}
TypeInfo_Class[string] registry; // you need that...
static this()
{
registerFactoryClass!(Foo!int)(registry); // ...and that,
maybe with another name
}
void main()
{
auto fooDeInt = iz.memory.factory(registry, "Foo!int");
destruct(cast(Object) fooDeInt);
}
---
