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module virtual_poly_runme;
import std.exception;
import virtual_poly.NDouble;
import virtual_poly.NInt;
import virtual_poly.NNumber;
void main() {
// D supports covariant (polymorphic) return types, so this should work like
// in C++.
auto d = new NDouble(3.5);
NDouble dc = d.copy();
enforce(d.get() == dc.get(), "Test 1 failed.");
auto i = new NInt(2);
NInt ic = i.copy();
enforce(i.get() == ic.get(), "Test 2 failed.");
NNumber n = d;
auto nd = cast(NDouble) n.copy();
enforce(nd.get() == d.get(), "Test 3 failed.");
}
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