Caché ObjectScript Reference - InterSystems Documentation

ArgumentspcAn optional postconditional expression that can make the command conditional. If the postconditionalexpression is appended to the GOTO command keyword, Caché executes theGOTO command if the postconditional expression is true (evaluates to a non-zero numericvalue). Caché does not execute the GOTO command if the postconditional expression isfalse (evaluates to zero). If the postconditional expression is appended to an argument, Cachéexecutes the argument if the postconditional expression is true (evaluates to a non-zeronumeric value). If the postconditional expression is false (evaluates to zero), Caché skips thatargument and evaluates the next argument (if there is one) or the next command. For furtherdetails, refer to Command Postconditional Expressions in Using Caché ObjectScript.locationThe point to which control will be transferred. It is required in routine code. It is optionalfrom the programmer prompt. You can specify location as a single value or as a commaseparatedlist of values (with postconditionals) and can take any of the following forms:label+offset specifies a line label within the current routine. The optional +offset is a nonnegativeinteger that specifies the number of lines after the label at which execution is to start.label+offset^routine specifies a line label within the named routine, which resides on disk.Caché loads the routine from disk and continues execution at the indicated label. The optional+offset is a nonnegative integer that specifies the number of lines after the label at whichexecution is to start.^routine specifies a routine that resides on disk. Caché loads the routine from disk and continuesexecution at the first line of executable code within the routine. If you specify a nonexistentroutine, Caché issues a error message. For more information, referto the $ZERROR special variable.You can also reference location as a variable containing any of the above forms. In this case,though, you must use name indirection. location cannot specify a subroutine label that isdefined with a formal parameter list or the name of a user-defined function or procedure. Ifyou specify a non-existent label, Caché issues a error message. For more information,refer to Indirection in Using Caché ObjectScript.ExampleGOTOIn the following example, the GOTO directs execution to one of three locations dependingon the user-supplied age value. The location is a subroutine label that is stored in variableloc and then referenced by means of name indirection (@loc).Caché ObjectScript Reference 47