FunctionEvaluator

class FunctionEvaluator

Class to evaluate function expressions given by a string.

Public Functions

void create(const std::string &expr)

Build the evaluator object.

Parameters:

expr – Function expression to be evaluated

void create(const std::vector<std::string> &expressions)

Build the evaluator object.

Parameters:

expressions – Function expressions (one per component) to be evaluated

void define_constant(const std::string &name, Real value)

Define a constant.

Parameters:

• name – Name of the constant

• value – Value

void register_function(Function *fn)

Register user function with function evaluator.

Parameters:

fn – Function to register

Real evaluate(Int dim, Real time, const Real x[])

Evaluate the function expression at time time and spatial position x

Parameters:

• dim – Spatial dimension

• time – Simulation time

• x – Spatial location