Does PiecewiseYieldCurve derive from YieldTermStructure

Posted by willshaw on
URL: http://quantlib.414.s1.nabble.com/Does-PiecewiseYieldCurve-derive-from-YieldTermStructure-tp5413.html

Maybe it's a silly question.

I see the declaration of PiecewiseYieldCurve. It inherits from LazyObject. But in example, it looks like PiecewiseYieldCurve inherits from YieldTermStructure and it can use member functions of YieldTermStructure.

But I only see class PiecewiseYieldCurve: public LazyObject. I'm really confused. Please help me.
Thank you.