On Sunday, 26 May 2019 at 17:51:37 UTC, Aphex wrote:
1. Is it possible to have a runtime class and struct creator function that can deal with templates. It doesn't seem like it should be that big a deal. One only needs to actually know the size of class and that will depend on the template parameter sizes, which if they are known then everything is known?

The root problem is described in https://issues.dlang.org/show_bug.cgi?id=2484. In short, the D runtime keeps track of all class types and lets you search through them and instantiate them if you wish. Sadly, this doesn't cover templated classes, in part because an instantiation of a templated class is not necessarily in the module that defined it, and because there may be multiple identical instantiations across multiple modules.

Now, templated classes still have .classinfo members, and these can be used with _d_newclass to create new instances of the class. I filed an issue with Orange for this: https://github.com/jacob-carlborg/orange/issues/57

2. Is the output or Orange for templated classes correct? "Issue1.Y!string.Y" or should it be "Issue1.Y!string"? Else this is a bug that I'll need to track down and fix.

The name Issue1.Y!string.Y is correct - 'class Y(T) {}' is short for 'template Y(T) { class Y {} }'.


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