CSC/ECE 517 Fall 2010/ch5 5c IC: Difference between revisions
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==Introduction== | ==Introduction== | ||
Dynamic dispatch is an object-oriented programming concept that refers to the mapping of a method to an object's dynamic | Dynamic dispatch is an object-oriented programming concept that refers to the mapping of a method to an object's dynamic runtime type. It is common in many object-oriented languages. Languages such as Java and C++ use single dispatch, while only a few, such as CLOS, use multiple dispatch. Both types of dispatch will be discussed later. | ||
'''Advantages''' | '''Advantages''' | ||
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* Obstacle to optimization | * Obstacle to optimization | ||
* Hinders compiler in determining exact type of objects | * Hinders compiler in determining exact type of objects | ||
==Single Dispatch== | |||
==Multiple Dispatch== | |||
==References== | ==References== | ||
Revision as of 01:17, 1 November 2010
Dynamic Dispatch
Introduction
Dynamic dispatch is an object-oriented programming concept that refers to the mapping of a method to an object's dynamic runtime type. It is common in many object-oriented languages. Languages such as Java and C++ use single dispatch, while only a few, such as CLOS, use multiple dispatch. Both types of dispatch will be discussed later.
Advantages
- Flexibility
- Extensibility
Disadvantages
- Lookup overhead
- Counter to safety and increased compile-time knowledge
- Obstacle to optimization
- Hinders compiler in determining exact type of objects
Single Dispatch
Multiple Dispatch
References
[1] S. Milton, H.W. Schmidt, “Dynamic Dispatch in Object-Oriented Languages”, 2004.
[2] M. Muller, “Message Dispatch in Dynamically-Typed Object-Oriented Languages”, Master’s Thesis, University of New Mexico, 1995.