Footnotes

(1)

Don't forget to import the (oop goops) module

(2)

<complex> is in fact a builtin class in GOOPS. Because of this, GOOPS will create a new class. The old class will still serve as the type for Guile's native complex numbers.

(3)

With the new definition of <complex>, a <real> is not a <complex> since <real> inherits from <number> rather than <complex>. In practice, inheritance could be modified a posteriori, if needed. However, this necessitates some knowledge of the meta object protocol and it will not be shown in this document

(4)

This section is an adaptation of Jeff Dalton's (J.Dalton@ed.ac.uk) Brief introduction to CLOS

(5)

The parameter list for a define-method follows the conventions used for Scheme procedures. In particular it can use the dot notation or a symbol to denote an arbitrary number of parameters