In addition to unwind_protect, Octave supports another limited form of exception handling.
The general form of a
try block looks like this:
try body catch cleanup end_try_catch
Where body and cleanup are both optional and may contain any Octave expressions or commands. The statements in cleanup are only executed if an error occurs in body.
No warnings or error messages are printed while body is
executing. If an error does occur during the execution of body,
cleanup can use the function
lasterr to access the text
of the message that would have been printed. This is the same
) but it is more efficient since
the commands do not need to be parsed each time the try and
catch statements are evaluated. See Error Handling, for more
information about the
Octave's try block is a very limited variation on the Lisp condition-case form (limited because it cannot handle different classes of errors separately). Perhaps at some point Octave can have some sort of classification of errors and try-catch can be improved to be as powerful as condition-case in Lisp.