On Sunday, 12 October 2014 at 19:46:41 UTC, ketmar via
Digitalmars-d-learn wrote:
Hello.
please, how to call template constructor of a class? it's
completely
escaped my mind. i.e. i have this class:
class A {
this(alias ent) (string name) {
...
}
}
and i want to do:
void foo () { ... }
auto a = new A!foo("xFn");
yet compiler tells me that
"template instance A!foo A is not a template declaration, it is
a class"
I think there's no nice way to explicitly pass template arguments
to constructors. Here's a hack:
auto a = cast(A) (new void[__traits(classInstanceSize,
A)]).ptr;
a.__ctor!foo("xFn");
I didn't think this through or test it thoroughly. So it most
probably has issues. You could try to identify and fix them, and
then hide the ugly away in a function.
But the two leading underscores tell it: "__ctor" is an
implementation detail. It may disappear/change without notice.
Some other solution/workaround would probably be the better
choice. Like a static factory method that's already been
mentioned.
