Right. When you have u :: v of try. catch., the error must persist
until it has been analyzed by the error handler. It could be removed
when the error handler finishes, but it isn't.
Henry Rich
On 12/27/2021 11:35 AM, bill lam wrote:
I believe this is the intended behaviour and a common practice. You should
check for error message immediately after error occurs.
On 27 Dec 2021, at 11:38 PM, Don Guinn <[email protected]> wrote:
To catch errors in code that I was not aware of due to error handling such
as try-catch or whatever, I checked the value of the error message
(13!:12''). But it found the error message is set even though no error was
signaled. Below is a new J session.
13!:12''
|interface error
| ferase fs
|[-127] C:\J903\system\util\boot.ijs
+'x'
|domain error
| +'x'
13!:12''
|domain error
| +'x'
erase nl ''
1 1 1 1
13!:12''
|domain error: erase
| erase nl''
JVERSION
Engine: j903/j64avx2/windows
Release-a: commercial/2021-12-16T15:15:09
Library: 9.03.08
Qt IDE: 1.9.5/5.15.2(5.15.2)
Platform: Win 64
Installer: J903 install
InstallPath: c:/j903
Contact: www.jsoftware.com
I don't see this as a bug that needs fixing but is interesting. I have seen
this show up in a lab attempting to define a tacit inverse of dyadic
factorial. The message was set in 13!:12'' but not signaled. But using that
definition would be an error. Maybe some of these errors should be signaled
so it could be fixed earlier and more easily.
And I'm curious as to what that interface non-error is all about.
Yes, I need to look at my initialization of J to find out why some names
are defined in a supposedly clear workspace.
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