Most functional programming languages like Haskell or ML allow
to define functions using pattern matching. Instead of testing
arguments in the body of a message, this allows to specify case-
based function definitions in a very elegant way. An example of
such a definition would be the factorial: fac(0) = 1 fac(n) = n
* fac(n - 1) This package provides an object model to describe
such functions, a parser to read the syntax, visitors to
transform the code to ordinary smalltalk code and a browser to
make it easy to work with. The advantage is, that it is fully
integrated into Squeak and allows to be used with any other part
of the system. Furthermore it is transparent to any source-
management tool and does not require a runtime library. The goal
of this package is to allow the developer to write functions in
a more natural way and to transform these functions to ordinary
Smalltalk code: The previous example can be written and compiled
in the functional browser using a slightly enhanced Smalltalk
syntax, as seen b