%PrevV function
Function
The function returns previous value of the argument. Function usefulness - eval tags.
Declaration
UNIVAL %PrevV( UNIVAL in Arg )
Parameters
Arg
Expression of optional type.
Note
Based on the way of evaluation of eval tag the result will be:
periodical eval tag - returns the value of argument valid during previous calculation,
on-change eval tag - returns previous value of the argument.
Implemented functions
Function arguments - types