Ok, I think we have to seperate two things:
1) posting error messages
2) obtaining error codes
I think Roman is primarly interested in 2), so that his patches can
programmatically deal with certain error conditions.
Of course, 1) and 2) can be combined into a single object, basically
errno + strerror.
I just shudder at the thought that users would start parsing error
messages. After all, error messages are meant for display and can change
at any moment. In the future, error messages might even get localized.
I find it extremely important to add proper error codes from the start
to establish good practices.
i mean, there currently is no such thing and if you want to use it you
have to hope for the object author to implement it.
Sure. But library authors could update their objects to introduce error
codes. If well designed, error codes could be entirely optional, e.g.
[errno] outputting -1 if no error code was set.
Christof
On 14.06.2021 15:55, IOhannes m zmoelnig wrote:
On 6/14/21 3:33 PM, Christof Ressi wrote:
Here's another idea, which I don't really love, but which I would
prefer over your proposed [canvaserror]:
Method calls which can generate an error send the error code to a
global [errno] object and the user can query the current error state
with a bang. This would be similar to 'errno' in C.
but which error-code?
i mean, there currently is no such thing and if you want to use it you
have to hope for the object author to implement it.
the nice thing about the [patcherror] object is that no changes would
be required to whatever objects (apart from the patch that uses it,
obviously; but that's true for all solutions).
i also like the possibility, to suppress error printout (e.g. when
opening an *optional* configuration file).
and: it would allow us to catch *multiple* errors (e.g. if an object
emitted two errors in a row, without stopping to send something to the
outlet so we can query the errno).
as well as being able to catch errors that are not triggered by a
message directly (think: delayed opening of a file; either because
this happens only when dsp is turned on, or even in a separate thread).
gamdrs
IOhannes
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