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Dynamic dispatch contrasts with static dispatch, in which the implementation of a polymorphic operation is selected at compile time. The purpose of dynamic dispatch is to defer the selection of an appropriate implementation until the run time type of a parameter (or multiple parameters) is known.
In computer programming, a virtual method table (VMT), virtual function table, virtual call table, dispatch table, vtable, or vftable is a mechanism used in a programming language to support dynamic dispatch (or run-time method binding).
Multiple dispatch or multimethods is a feature of some programming languages in which a function or method can be dynamically dispatched based on the run-time (dynamic) type or, in the more general case, some other attribute of more than one of its arguments. [1]
Polymorphism can be distinguished by when the implementation is selected: statically (at compile time) or dynamically (at run time, typically via a virtual function). This is known respectively as static dispatch and dynamic dispatch, and the corresponding forms of polymorphism are accordingly called static polymorphism and dynamic polymorphism.
The agent is dynamically polymorphic at run-time because the object is created in the moment it is needed, dynamically, where the version of the objectified routine is determined at that time. The only strongly bound knowledge is of the Result type of the agent signature—that is—a named TUPLE with two elements.
This process, called dynamic dispatch, usually happens at run time by checking a table linked to the object to find the correct method. In this context, a method call is also known as message passing , meaning the method name and its inputs are like a message sent to the object for it to act on.
In computing, late binding or dynamic linkage [1] —though not an identical process to dynamically linking imported code libraries—is a computer programming mechanism in which the method being called upon an object, or the function being called with arguments, is looked up by name at runtime.
The Dynamic Language Runtime (DLR) from Microsoft runs on top of the Common Language Runtime (CLR) and provides computer language services for dynamic languages. These services include: A dynamic type system, to be shared by all languages using the DLR services; Dynamic method dispatch; Dynamic code generation; Hosting API