Previous: Predefined operations of asdf, Up: Operations
asdf was designed to be extensible in an object-oriented fashion. To
teach asdf new tricks, a programmer can implement the behaviour he
wants by creating a subclass of operation.
asdf's pre-defined operations are in no way “privileged”, but it is
requested that developers never use the asdf package for
operations they develop themselves. The rationale for this rule is
that we don't want to establish a “global asdf operation name
registry”, but also want to avoid name clashes.
An operation must provide methods for the following generic functions
when invoked with an object of type source-file: FIXME describe
this better
output-files
perform
The perform method must call output-files to find out
where to put its files, because the user is allowed to override
output-files for local policy explain
operation-done-p, if you don't like the default one