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dependency "mir-algorithm" version="~>3.10.61"

+/

import mir.algebraic: Nullable;

​

struct S

{

    int x;

}

​

struct T

{

    float y;

}

​

alias MySumType = Nullable!(S, T);

​

void main()

{

    MySumType a = S(3);

​

    import std;

    writeln(a, " ", a._is!S);

}