Re: detect emacs/xemacs in elisp?

["Stefan Monnier <foo@acm.com>" <monnier+gnu.emacs.help/news/@flint.cs.yale.edu>]

>>>>> "Jason" == Jason Addison <jason_addison@hotmail.com> writes:
> I have some elisp that works/doesn't work in emacs/xemacs in my
> ".emacs" file.

You can use

        (condition-case nil
            (this-is-the thing that might fail)
          (error nil))

to tell Emacs to ignore any error that might occur while executing
the form (this-is-the thing that might fail).

If you do (require 'cl) you can equivalently use the following shorthand:

        (ignore-errors (this-is-the thing that might fail))

> Another way around this
> would be to know how to determine if a function is defined before
> calling it.

(if (fboundp 'foo)
    (foo some arg))


        Stefan