function.h

a basic interpreter free basic

#pragma once
#include "Common.h"
/*
 * Class CFunction - Type for a single function (builtin or defined)
 */
class CFunction
{
private:
	// Name of a function
	string m_Name;

	// Is this a builtin function?
	bool m_Builtin;

	// For defined functions, store the expression to be
	// evaluated at runtime
	string m_Expression;

	// For builtins, provide a coderef
	float (*m_Coderef)(float Value);

	// Symbol used for parameter
	CSymbol *m_Symbol;

public:
	CFunction(void);
	CFunction(string Name, float (*coderef)(float));
	CFunction(string Name, string Expression);
	~CFunction(void);
	// Set the name of a function
	void SetName(string Name);
	// Get the name of the current function
	string GetName(void);
	// Set the builtin flag to either true or false
	void SetBuiltin(bool Value);
	// Returns true if the function is a builtin
	bool GetBuiltin(void);
	// Set the expression to run when the function is called
	void SetExpression(string Expression);
	// Get the runtime expression of the function
	string GetExpression(void);
	// Set the coderef for a builtin function
	void SetCoderef(float (*coderef)(float));

	// Execute the builtin function by coderef
	float ExecuteBuiltin(float Value);
	// Set the symbol used as a parameter
	void SetSymbol(CSymbol * Symbol);
	// Get the symbol used for the function parameter
	CSymbol * GetSymbol(void);
};