INCLAN: erract: Difference between revisions

From CYANA Wiki
Jump to navigation Jump to search
No edit summary
Line 1: Line 1:
"erract" is a variable for error handling in macros. If an error occurs
== Synopsis ==
within a macro, the value of erract is executed as a command. By default
 
the exit command is executed, i.e. the program returns to interactive
'''erract'''
input. Errors that occur interactively are displayed and the program
 
continues with the execution of the next statement.
== Description ==
 
A variable for error handling in macros. If an error occurs within a macro, the value of '''erract''' is executed as a command. By default the '''exit''' command is executed, i.e. the program returns to interactive input. Errors that occur interactively are displayed and the program continues with the execution of the next statement, regardless of the setting of of the erract variable. If, for instance,


== Example ==  
== Example ==  


  set erract="show; quit"
  erract := "show; quit"


In case of an error in a macro a listing of all global variables
Then in case of an error in a macro a listing of all global variables is given, and the program is stopped. Such error handling can be useful if the program is used non-interactively.
is given, and the program is stopped. Such error handling can be
useful if the program is used non-interactively.

Revision as of 13:29, 17 August 2009

Synopsis

erract

Description

A variable for error handling in macros. If an error occurs within a macro, the value of erract is executed as a command. By default the exit command is executed, i.e. the program returns to interactive input. Errors that occur interactively are displayed and the program continues with the execution of the next statement, regardless of the setting of of the erract variable. If, for instance,

Example

erract := "show; quit"

Then in case of an error in a macro a listing of all global variables is given, and the program is stopped. Such error handling can be useful if the program is used non-interactively.