25#ifndef quantlib_quote_hpp
26#define quantlib_quote_hpp
28#include <ql/handle.hpp>
29#include <ql/errors.hpp>
30#include <ql/utilities/null.hpp>
Object that notifies its changes to a set of observers.
purely virtual base class for market observables
virtual bool isValid() const =0
returns true if the Quote holds a valid value
virtual Real value() const =0
returns the current value
~Quote() override=default