Unions

Explore the concept of unions in D programming and understand how they allow different data types to share the same memory space. Learn the differences between unions and structs, their memory size implications, and practical considerations for safe use across platforms. This lesson helps you handle low-level memory sharing effectively in D.

We'll cover the following...

- Introduction

Introduction

Unions, a low-level feature inherited from the C programming language, allow more than one member of the user-defined type to share the same memory area. Unions are very similar to structs with the following main differences:

Unions are defined by the union keyword.
The members of a union are not independent; they share the same memory area.

Just like structs, unions can have member functions. The examples below will produce different results depending on whether they are compiled on a 32-bit or a 64-bit environment.
Naturally, struct objects are as large as necessary to accommodate all of their ...

1.Introduction

2.Lifetimes, null Value and the is Operator

3.Type Conversions

4.Structs

5.Variable Number of Parameters

6.Function Overloading and Member Functions

7.Constructor and Other Special Functions

8.Operator Overloading

9.Introduction to Classes

10.Inheritance

11.The Object Class

12.Interfaces

13.destroy and scoped

14.Modules and Libraries

15.Encapsulation and Protection Attributes

16.UFCS, Properties and Contract Programming

17.Templates

18.Pragmas, alias and with

19.Pointers

20.Bit Operations

21.Conditional Compilation

22.Function Pointers, Delegates, and Lambdas

23.foreach with Structs and Classes

24.Unions, Labels, goto and Tuples

25.More Templates

26.More Functions

27.Mixins

28.Ranges

29.static foreach and Parallelism

30.Message Passing Concurrency

31.Data Sharing Concurrency

32.Fibers

33.Memory Management

34.User Defined Attributes (UDA) and Operator Precedence

35.Conclusion

Unions

Introduction