import std.stdio;

​

static interface I { ref double bar() @safe pure nothrow @nogc; }

static abstract class D { int index; }

static class C : D, I

{

    double value;

    ref double bar() @safe pure nothrow @nogc { return value; }

    this(double d) { value = d; }

    ~this() nothrow {}

}

​

void main() nothrow

{

    auto c = new C(1);

    destroy(c);

}

​