Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.lang.postscript > #2558
| From | Martin Leese <please@see.Web.for.e-mail.INVALID> |
|---|---|
| Newsgroups | comp.lang.postscript |
| Subject | Re: How to test if a procedure is defined ? |
| Date | 2016-05-01 08:04 -0600 |
| Organization | A noiseless patient Spider |
| Message-ID | <ng5271$ufi$1@dont-email.me> (permalink) |
| References | <slrnnibqmm.54q.peter@box8.pjb.com.au> |
Peter Billam wrote:
> Greetings. I'm wanting to put together something like perl or lua
> 'require', by testing if some procedure is defined, and if not
> then run-ning the PS 'library' file that will define it.
> But I don't see how to test if a procedure is defined. Anything like
> gloop type or gloop gcheck
> just crashes if gloop is undefined, before type or gcheck get executed.
> /gloop type
> just reports nametype, even if gloop doesn't exist.
> Is there eg: a way to invoke gloop within a crash-free sandbox,
> eg like pcall in lua ? Any other way to test if it's defined ?
Try:
yourdict /gloop known
or, if the appropriate dictionary is on the dictionary stack:
/gloop where
--
Regards,
Martin Leese
E-mail: please@see.Web.for.e-mail.INVALID
Web: http://members.tripod.com/martin_leese/
Back to comp.lang.postscript | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
How to test if a procedure is defined ? Peter Billam <peter@www.pjb.com.au> - 2016-05-01 11:39 +0000
Re: How to test if a procedure is defined ? Martin Leese <please@see.Web.for.e-mail.INVALID> - 2016-05-01 08:04 -0600
Re: How to test if a procedure is defined ? Peter Billam <peter@www.pjb.com.au> - 2016-05-02 01:06 +0000
Re: How to test if a procedure is defined ? luser- -droog <mijoryx@yahoo.com> - 2016-05-01 19:45 -0700
Re: How to test if a procedure is defined ? Peter Billam <peter@www.pjb.com.au> - 2016-05-02 05:48 +0000
csiph-web