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Gnu smalltalk 1.95.4

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mjl 2001-07-10 22:31:06 +00:00
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GNU Smalltalk is an implementation that closely follows the
Smalltalk-80 language as described in the book `Smalltalk-80: the
Language and its Implementation' by Adele Goldberg and David Robson.
The Smalltalk programming language is an object oriented programming
language. This means, for one thing, that when programming you are
thinking of not only the data that an object contains, but also of the
operations available on that object.
In the Smalltalk language, everything is an object. This includes
numbers, executable procedures (methods), stack frames (called method
contexts or block contexts), etc. Each object is an "instance" of a
"class". A class can be thought of as a datatype and the set of
functions that operate on that datatype. An instance is a particular
variable of that datatype. When you want to perform an operation on an
object, you send it a "message", and the object performs an operation
that corresponds to that message.
Unlike other Smalltalks (including Smalltalk-80), GNU Smalltalk
emphasizes Smalltalk's rapid prototyping features rather than the
graphical and easy-to-use nature of the programming environment.
Smalltalk is a Free (or Open Source) implementation that closely
follows the Smalltalk-80 language as described in the book
Smalltalk-80: the Language and its Implementation by Adele
Goldberg and David Robson.