GOOPS NEWS --- history of user-visible changes. -*- text -*- Copyright (C) 1999 Free Software Foundation, Inc. See the end for copying conditions. Please send GOOPS bug reports to bug-guile@gnu.org. Changes since GOOPS 0.1.4: Changes since GOOPS 0.1.2: * Changes to the distribution ** GOOPS 0.1.4 is dependent on Guile version >= 1.3.3 * Changes to Scheme functions and syntax ** A new scheme for "forwarding" calls to a builtin to a generic function It is now possible to extend the functionality of some Guile primitives by letting them defer a call to a GOOPS generic function on argument mismatch. This functionality is enabled with the GOOPS primitive enable-primitive-generic! PRIMITIVE ... [This primitive will disappear again in Guile-1.4 when all primitives will be primitive generics.] It is then possible to extend the primitive(s) by defining methods for them without loss of efficiency in normal evaluation. Example: (use-modules (oop goops)) (enable-primitive-generic! +) (define-method + ((x ) (y )) (string-append x y)) + will still be as efficient as usual in numerical calculations, but can also be used for concatenating strings. Who will be the first one to extend Guile's numerical tower to rationals? :) Changes since GOOPS 0.1: * Changes to Scheme functions and syntax ** Corrected serious bugs in compute-slot-accessors and initialize . Copyright information: Copyright (C) 1999 Free Software Foundation, Inc. Permission is granted to anyone to make or distribute verbatim copies of this document as received, in any medium, provided that the copyright notice and this permission notice are preserved, thus giving the recipient permission to redistribute in turn. Permission is granted to distribute modified versions of this document, or of portions of it, under the above conditions, provided also that they carry prominent notices stating who last changed them. Local variables: mode: outline paragraph-separate: "[ ]*$" end: