Re: Is (catch #t (lambda () (use-modules (xxx))) ...) OK?

[Neil Jerram]

>>>>> "Rob" == Rob Browning <address@hidden> writes:

    Rob> Is this an effective way to test for the existence of a
    Rob> module, and if so, will a second (use-modules ...)  be
    Rob> required to actually get an effect on the top-level envt?
    Rob> i.e.

    Rob>   (if (catch #t (lambda () (use-modules (xxx)) #t) (lambda
    Rob> (key . args) #f)) (use-modules xxx) (do-something-else ...))

    Rob> or is the use-modules inside the catch sufficient?

I'm not sure about the use-modules inside the closure being
sufficient.  But you might like to know that boot-9.scm includes the
`false-if-exception' procedure, which basically implements the catch
for you.

Regards,
        Neil