Re: allocating an object of abstract class type error
Posted by
Luigi Ballabio on
Jan 12, 2017; 9:59am
URL: http://quantlib.414.s1.nabble.com/allocating-an-object-of-abstract-class-type-error-tp17968p17969.html
A class is abstract when it (or one of its base classes) declares a pure virtual method and doesn't define it.
In your case: CmsSpreadCouponPricer inherits from FloatingRateCouponPricer, which declares a bunch of virtual methods:
virtual Real swapletPrice() const = 0;
virtual Rate swapletRate() const = 0;
virtual Real capletPrice(Rate effectiveCap) const = 0;
virtual Rate capletRate(Rate effectiveCap) const = 0;
virtual Real floorletPrice(Rate effectiveFloor) const = 0;
virtual Rate floorletRate(Rate effectiveFloor) const = 0;
virtual void initialize(const FloatingRateCoupon& coupon) = 0;
so FloatingRateCouponPricer is abstract. CmsSpreadCouponPricer doesn't define them, so it's also abstract. LognormalCmsSpreadPricer inherits from CmsSpreadCouponPricer and defines them (that is, gives them actual bodies) so it's a concrete class and can be instantiated.
For more details, you can probably check any C++ book.
Cheers,
Luigi
Hello, QuantLib community
I'm getting error 'allocating an object of abstract class type error' sometimes while working with some classes
For example:
return new CmsSpreadCouponPricer(correlation);
How do I know which class is abstract and can't allocate memory?
Thanks!
Regards
Jerry
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