Execution of $class Definition Body

This section describes when the $class definition body is executed.

When the $class statement is executed, the $class definition body will be executed. This is how class variables get their default values assigned.

Example showing the execution of $class definition body:

$class circle: {
   write("Adding class variables...");
   pi = 3.14159;
   $function area(radius): {
      return ^.pi*radius**2; 
   $function circumference(radius): {
      return ^.pi*radius*2; 

# you see the "Adding class variables..." message displayed

Last update: 2017.

Table of Contents

 About This Book

 Introduction of H Language


 Data Types




 "boolean" Data Type

 "integer" Data Type

 "string" Data Type

 "real" Data Type

 "array" Data Type

 Source Code Packages

Classes and Objects

 What Is Class

 What Is Object

 $class Statement - Create New Classes

 Class Variables and Functions

Execution of $class Definition Body

 __new() - Object Constructor Function

 $instance Statement - Define Instance Template

 Execution of $instance Definition Body

 Access Object Properties

 $method Statement - Define Object Method

 Access Object Methods

 _first() Method - Object Initialization

 Access Class Variables from Object Methods

 __delete() - Object Destructor Method

 $delete Statement - Delete Objects

 _last() Method - Object Cleanup

 Object Oriented Programming

 Inheritance - Object Attachments

 Encapsulation - Private Members


 PDF Printing Version