Singleton

Usage

• A class of which only a single instance can exist
• Ensure a class has only one instance and provide a global point of access to it
• Make all constructors and destructors private

Diagram

Participants

Singleton

• Defines an Instance operation that lets clients access its unique instance. Instance is a class operation.
• Responsible for creating and maintaining its own unique instance.

Description

• Singleton class Dossier
• Uses lazy instantiation

Source code

• Options.h
• Options.cpp

Examples

• test.cpp
• output.txt