ConvertBot: Handles trapping of errors in the macro language

2020-04-27T22:04:57Z

Handles trapping of errors in the macro language

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Handles trapping of errors in the macro language
<pre>
<TYPE> - Type of exception = ERROR|WARNING|OFF [DEF=ERROR]
<LABEL> - Name of statement label or "OFF" to disable TRAP [DEF=OFF]
<QUIET> - YES to trap quietly; NO to trap noisily [DEF=NO]

The above parameters are only used for .TXT macro support. NeXtMidas .MM macro
traps are enabled by defining a processException procedure in your macro.

Traps are ALWAYS ON in NeXtMidas. Handle macro exceptions (errors) by including
a processException procedure in your macro.

Example:

startmacro

set fileName "bad_file_name"
label re_enter
if filename EQS "bad_file_name" then
error "The file name ^filename is a BAD file name"
endif
stop

label try_again
set newFileName "good_file_name"
ask S:filename "^filename is a BAD. Enter new filename[^newfileName]: "
goto re_enter

endmacro

procedure processException M:emsg
! say "Caught exception, name=^{emsg.name} emsg.data=^{emsg.data}"
say "Caught exception, continue processing.."
goto try_again
return

</pre>

[[Category:NXM_Explain]]

TRAP - Revision history

ConvertBot: Handles trapping of errors in the macro language