__new() - Object Constructor Function

This section describes what is object constructor function.

Object constructor function, __new(), is a special class function automatically created by the H system when a $class statement is executed. You should never create your own version of __new() function to override the system created version.

The syntax to call the constructor function is:

class_name.__new(); 

But a shorthand version is supported:

class_name(); # shorthand version of the following
class_name.__new(); 

Examples of calling object constructor functions:

# an empty class
$class dummy: {};

b = dummy.__new(); # creates a "dummy" object
d = dummy(); # creates a "dummy" object

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