This code doesn't work!

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import std.stdio;
 
void main(string[] args)
{
        auto t = new Child;
        t.fuga();
        writeln("done.");
}
 
class Parent
{
public:
        bool isHage() const @property;
 
public:
        abstract void fuga()
        out
        {
                assert(isHage);
        }
        body { }
}
 
class Child : Parent
{
        override bool isHage() const @property
        {
                return true;
        }
        override void fuga()
        {
                //nop
        }
}
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