| Re: Error handling by build-in IDL routines [message #14640] |
Tue, 16 March 1999 00:00 |
Vapuser
Messages: 63
Registered: November 1998
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Member |
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"R.Bauer" <R.Bauer@fz-juelich.de> writes:
> Try this!
>
> PRO t2,test
>
> HELP,/recall,output=output
> for_test=(STR_SEP(output[1],','))[1]
> varsize=SIZE(routine_names(for_test,fetch=-1),/type)
> VarValue = Routine_Names(for_test, FETCH=-1 )
>
> IF test EQ varvalue THEN IF varsize NE 4 THEN $
> MESSAGE,'Expression must be of type FLOAT:'+for_test,/info
>
> END
>
> dd='dummy'
> t2,dd
>
> % T2: Expression must be of type FLOAT:dd
>
>
> R.Bauer
I don't think this work in a procedure.
If anyone out there in RSI land is listening...
It would be nice to have a function like the Perl package Carp.pm,
which reports errors from the line number of the invocation of Carp's
calling routine. So, say you have a perl routine foo which reports
some error by calling carp. The linenumber given in the error message
emitted by Carp is the line at which foo is called, not the line at
which Carp is called. That way, you can write error handling code that
doesn't have to keep track of the stack, and depend on the output from
help.
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| Re: Error handling by build-in IDL routines [message #14658 is a reply to message #14640] |
Mon, 15 March 1999 00:00  |
R.Bauer
Messages: 1424
Registered: November 1998
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Senior Member |
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Frank Holland wrote:
> Hi!
>
> I have a question about error handling by build-in IDL routines.
> Consider the following example:
>
> fritz = 'the cat'
> print, median(fritz)
>
> IDL replies with:
> % MEDIAN: Expression must be an array in this context: FRITZ.
> % Execution halted at: $MAIN$
>
> My question:
> How does the function MEDIAN knows the name of the parameter (i.e.
> FRITZ) I passed into it? How can I implement this functionality into my
> own IDL routines?
>
> Thanks for any suggestions,
>
> Frank
Try this!
PRO t2,test
HELP,/recall,output=output
for_test=(STR_SEP(output[1],','))[1]
varsize=SIZE(routine_names(for_test,fetch=-1),/type)
VarValue = Routine_Names(for_test, FETCH=-1 )
IF test EQ varvalue THEN IF varsize NE 4 THEN $
MESSAGE,'Expression must be of type FLOAT:'+for_test,/info
END
dd='dummy'
t2,dd
% T2: Expression must be of type FLOAT:dd
R.Bauer
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| Re: Error handling by build-in IDL routines [message #14661 is a reply to message #14658] |
Mon, 15 March 1999 00:00 |
R.Bauer
Messages: 1424
Registered: November 1998
|
Senior Member |
|
|
Frank Holland wrote:
> Hi!
>
> I have a question about error handling by build-in IDL routines.
> Consider the following example:
>
> fritz = 'the cat'
> print, median(fritz)
>
> IDL replies with:
> % MEDIAN: Expression must be an array in this context: FRITZ.
> % Execution halted at: $MAIN$
>
> My question:
> How does the function MEDIAN knows the name of the parameter (i.e.
> FRITZ) I passed into it? How can I implement this functionality into my
> own IDL routines?
>
> Thanks for any suggestions,
>
> Frank
Try this!
PRO t2,test
HELP,/recall,output=output
for_test=(STR_SEP(output[1],','))[1]
varsize=SIZE(routine_names(for_test,fetch=-1),/type)
VarValue = Routine_Names(for_test, FETCH=-1 )
IF test EQ varvalue THEN IF varsize NE 4 THEN $
MESSAGE,'Expression must be of type FLOAT:'+for_test,/info
END
dd='dummy'
t2,dummy
R.Bauer
Hallo Frank,
ich denke gerade �ber eine allgemeinere Funktion nach.
Die Idee von heute morgen war eigentlich schon fast richtig. Ich habe nur
nicht an
den recall buffer gedacht.
R.
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