Temporary Variables

Note
Temporary variables in block diagrams are deprecated; they will be removed in a future ASCET version. Consider using common subexpression elimination instead. To use temporary variables in block diagrams, the Disable BDE Temp Variable Generation option in the "Optimization" node of the parent project properties must be deactivated.

Note

Temporary variables in block diagrams are deprecated; they will be removed in a future ASCET version. Consider using common subexpression elimination instead.

To use temporary variables in block diagrams, the Disable BDE Temp Variable Generation option in the "Optimization" node of the parent project properties must be deactivated.

To avoid multiple execution within the same method or process, temporary variables can be specified for each operator or method call or hierarchy/statement block output in a block diagram. With that, the value of the expression is computed only once for each block it is used in, and stored to a temporary variable. When the expression is used again in that method, it is not re-evaluated but the temporary variable is reused.

A temporary variable does not have a start value; its value is determined only by the assignment of an expression. ASCET internally manages the temporary variables and provides a unique assignment (e.g. in the branches of an IF statement) so that no undefined values turn up when the temporary variable is used later. The value remains valid until a new assignment to the temporary variable occurs.

The example shows the temporary variable t which stores and reuses the value of the addition a + b:

t = a + b;

c = t;

d = t;