virtual Number * Absolute()=0
Represents a mathematical function in a syntax tree.
static FunctionNode * Create(ExpressionNode *expression, char *text, char *sys)
virtual Number * Evaluate()=0
AbsoluteFunctionNode(ExpressionNode *expression, char *text, char *sys)
FunctionNode(ExpressionNode *expression, char *text, char *sys)
Base class for all nodes related to mathematical expressions.
ExpressionNode * expression