Here are the classes, structs, unions and interfaces with brief descriptions:

<Function>	Function defines the interface that describes a function that can be used as a user defined function in a MathParser instance
MathParser	MathParser class provides the capability to parse and evaluate math expressions given as strings at runtime
<Node>	Internal support protocol that represents parsed expression tree
<Parameter>	Parameter protocol represents a parameter that is passed into a user defined function
ParserException	Exception thrown by the parser when the expression has a problem
<VariableDelegate>	VariableDelegate returns the current value of a variable whose name is given