CODEWITHSUNDEEP
typesd
Jeroen
Jeroen

Reputation: 16815

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? 
}

Upvotes: 1

Views: 51

Answers (1)

Mihails Strasuns
Mihails Strasuns

Reputation: 3803

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).

Upvotes: 4

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