^PASSED
Determine whether an argument was passed
WTSupported in traditional Synergy on Windows
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WNSupported in Synergy .NET on Windows
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USupported on UNIX
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VSupported on OpenVMS
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^PASSED(parameter)
Arguments
parameter
The routine parameter in question. (a or n)
Return value
If the specified argument has been passed to the current routine, ^PASSED returns a value of one. If the argument has not been passed, the returned value is zero. (i)
Discussion
^PASSED determines whether or not a routine argument has been passed.
Parameter can be specified as the field name of a parameter, or by using ^ARG(n_expression) or ^ARGN(n_expression).
If you call ^PASSED on a required parameter, a “^PASSED on required parameter is always true” warning (INVPASSED) will occur.
^PASSED cannot be present in a main routine.
Examples
subroutine sub
arg1 ,a ;Optional parameter
arg2 ,a ;Optional parameter
arg3 ,a ;Optional parameter
record
i ,d2
proc
for i from 1 thru %numargs
if (^passed(^arg(i)))
.
. process argument(i)
.