One can define a abstract base class in C++ by defining a set of virtual functions
as having null values; the antithesis of an abstract class is a concrete class in which all functions have been specified.
04:10.3 Ethernet controller: Intel Corporation 82599 Ethernet Controller Virtual Function
Each element's cost is the difference between the Pentium III cycle counter value before and after executing the element, decreased by the time required to read the cycle counter; it includes the virtual function
call(s) that move a packet from one element to the next.
The member function residual is the lowest-level virtual function
call in the codes we developed, so we can evaluate the effects of run-time polymorphism on performance by comparing the run-time efficiency of these Integrators.
The storage needed for an interface object is two words: the pointer to the class object, optr, and the pointer to S_C_Interface<C>'s virtual function
Gourdin, "Virtual function
placement for service chaining with partial orders and anti-affinity rules," Networks, 2017
All three Classes share the same virtual function
table and therefore also share the same dynamic constructor.
The addition of this latest Nimbra Virtual Function
update will offer new and existing customers the industry's most adaptable remote production and live media delivery platform, the company said.
The ETX-2 NG-EADs also offer optional virtualization modules to allow RAD customers to enhance their services in a flexible manner by hosting any third party virtual function
Counterfeit Object-Oriented Programming (COOP)  is one of the examples which launches a successful attack by reusing virtual function
calls in the target program.
The Touch Bar is supposed to act as a virtual function
row and offers app shortcuts and access to emojis.
The solution can be combined with additional virtual functions
that provide video optimization, caching, and virtualized Base Band Units (vBBU) for Cloud RAN.