Whoo! Callbacks!
SoLoad now has support for user-defined callback functions.
The syntax goes
cbnew rtype atypes
to create a new callback function. The value returned from this command will always be used when the callback is invoked in the execution of another SoLoad command, so hang onto it.
When the callback is invoked, it will return a message in the form of
callback callbackID arg1 ... argN
instead of a normal function return.
If you want to delete the callback, simply go
cbdel callbackID
but as always, if you don't bother, it will be cleaned up at exit.
Other Changes in SoLoad
The "load" and "type" commands no longer require you to explicitly state the number of types they take. Support for giving referring to libraries, functions, and such by name was removed, as it complicated the program a great deal, and didn't really help at all when SoLoad was invoked from another program. Support for loadable definition files was axed too, with the realization that the information would generally be repeated the language-side bindings anyway, so the functions might as well be loaded dynamically there too.
Unfortunately, these changes mean that my old guides are now subtly inaccurate. I will add a note to that effect later, but will hesitate to write new documentation until I am reasonably sure the interface won't be changing for a while.
