To/From Code

	Languages
BROWSEBYLANGUAGE Access VBA ASP Classic C# C++ C++/CLI Corel Paradox Delphi Delphi Prism Java JavaScript Perl PHP VB Classic VB.Net

	Categories
BROWSEBYCATEGORY +Tool Basics -Language Basics Case Sensitivity Code Blocks Comments Constants End of Statement Literals Variables +Language Details +Data Structures +Statements +Operators +Commands +Database +OOP Basics +OOP Details

	C++/CLI Guides
C++/CLI To/From Conversion Guides C++/CLI and Access VBA C++/CLI and ASP Classic C++/CLI and C# C++/CLI and C++ C++/CLI and Corel Paradox C++/CLI and Delphi C++/CLI and Java C++/CLI and JavaScript C++/CLI and Perl C++/CLI and PHP C++/CLI and VB Classic C++/CLI and VB.Net

Cross Ref Guide

C++/CLILANGUAGE

C++/CLI

C++/CLIANDDELPHI PRISMTOC

Overview

+Tool Basics

Report Tools Overview

-Language Basics

+Language Details

+Statements

+Operators

+OOP Basics

Member Field◄╣

+OOP Details

	Members-Only
Sign in to see member-only pages.

► KB ► To/From Guides ► C++/CLI ► Language Basics

Print This

Member Field (Cross Ref > Language Basics)

By Mike Prestwood

C++/CLI versus Delphi Prism: A side by side comparison between C++/CLI and Delphi Prism.

OOP Basics

Some languages support object-based concepts such as Paradox, Access, and VB Classic. Other languages have OO extensions and fully support object orientation in a hybrid fashion (such as C++ and Dephi for Win32). Finally, some lanages such as C#, VB.Net, Prism, and Java are entirely written in OO. Meaning, every line of code written must occur within a class).

Member Field

[Other Languages]

Also known as a Class Field.

A class variable defined with a specific class visibility, usually private visibility. A member property is different than a member field. A member property uses a member field to store values through accessor methods (getters and setters). For example, it is common to use a private member field to store the current value of a property. The current values of all the class member fields is the current state of the object.

Languages Focus

What modifiers apply to member fields, if any? Typical member field modifiers include scope modifiers (private, protected, etc.) and read-only. Can you initialize the value of a member field when declared ensuring a default value?

[Not specified yet. Coming...]

Delphi Prism:

In Prism you can set the visibility of a member field to any visibility: private, protected, public, assembly and protected or assembly or protected.

Prism supports the readonly modifier for member fields which is handy for constant like data. In this case, I chose not to preface my read-only member field with "F" so it's usage is just like a read-only property.

Prism also support the class modifier (static data) for member fields.

Delphi developers should notice the use of := to initialize a member field (in Delphi you use an =).

Syntax Example:

Cyborg = class(System.Object)
private
  FSerialNumber: String:="A100";
public
  FCyborgName: String;
  FCyborgAge: Integer:=0;
 
  class SeriesID: Integer:=100; readonly;
end;

Delphi Prism Member Field