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

 Syntax

 Data Types

 Variables

 Expressions

 Statements

 "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

 References

 PDF Printing Version