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typesd

Can I create a struct out of a TypeInfo_Struct?

I have a TypeInfo_Stuct; how do I create a struct out of this? 

struct A {
    int example;
}

TypeInfo test = typeid(A);

void main() {
    // how do I create a structure of type A from test in here? 
}
Solution

  • I don't think it is possible. It implies polymorphic construction which is not provided for structs in D.

    Such functionality is supported by druntime for classes though:

    class A {}

auto ti = typeid(A);

void main()
{
    auto instance = cast(A) ti.create();
    assert(instance);
}

    One can possibly implement similar factory infrastructure for types other than classes but that is not available out of the box (and is somewhat discouraged).