ChainControlParsedFunctionWrapper

This class wraps libMesh::ParsedFunction for use of various parsed ChainControls.

For valid syntax for the function expression, see the function parser site.

The user-defined symbols may include the following:

• bool or Real ChainControlData

• Functions

• Scalar variables

• Constant values

Pre-defined symbols that may be used in the function expression are x, y, z, and t, representing the corresponding spatial coordinates and time value.