Description
A COLA is designed to be the simplest possible language which can be described in itself, so that the implementation exactly describes itself. In order to do this the structure of the environment is separated from the semantics of the computation performed.
The object system describes the structure of a prototype-based Object Oriented environment. This is implemented in terms of objects and message passing, which is in fact the same system it is describing. This allows modification of the system by using the same object oriented knowledge used to write any other application.
This object system is turned into a useful programming language by complementing it with a functional language describing what each object's methods do. The methods called from the object language are closures running a functional programming language.
Combined together, these two parts form a complete prototype-based Object Oriented programming language which is entirely self-hosting.
Read more about this topic: COLA (software Architecture)
Famous quotes containing the word description:
“He hath achieved a maid
That paragons description and wild fame;
One that excels the quirks of blazoning pens.”
—William Shakespeare (1564–1616)
“Whose are the truly labored sentences? From the weak and flimsy periods of the politician and literary man, we are glad to turn even to the description of work, the simple record of the month’s labor in the farmer’s almanac, to restore our tone and spirits.”
—Henry David Thoreau (1817–1862)
“To give an accurate description of what has never occurred is not merely the proper occupation of the historian, but the inalienable privilege of any man of parts and culture.”
—Oscar Wilde (1854–1900)