Creational

Creational patterns More...

Collaboration diagram for Creational:

Classes
struct	Singleton_demo
struct	Factory_method_demo
struct	Sample_product
struct	Sample_factory_method_demo
struct	Abstract_factory
struct	Sample_factory
struct	Prototype
	is the factory of himself More...
struct	Builder

Macros
#define	SINGLETON(Singleton)

Functions
void	creational_patterns_demo ()

Detailed Description

Creational patterns

https://refactoring.guru/design-patterns/creational-patterns

Macro Definition Documentation

SINGLETON

#define SINGLETON

(

Singleton

)

Value:

public:             \
    /* Meyers Singleton realization */ \
    static Singleton& instance() {  \
        static Singleton me;    \
        return me;      \
    }               \
    Singleton(const Singleton&) = delete;           \
    Singleton& operator=(const Singleton&) = delete;    \
    Singleton(Singleton&&) = delete;            \
    Singleton& operator=(Singleton&&) = delete;     \
private: \
    Singleton()

The singleton will be automatically safely instantiated on the first call.

Define constructor body after the define

Definition at line 186 of file patterns.cpp.

Function Documentation

creational_patterns_demo()

void creational_patterns_demo

(

)

Definition at line 272 of file patterns.cpp.

{
    Singleton_demo& singe = Singleton_demo::instance();
 
    unique_ptr<Abstract_factory> factory(new Sample_factory());
 
    auto product = factory->create();
 
    Prototype p1;
    auto p2 = p1.create();
 
    Sample_factory_method_demo C;
    assert(C.client() == 123);
 
    Interface& p = (Builder().add(1).add(2) << 3 << 4).create();
    assert(p.method() == 10);
    // strstream looks like string builder
    delete &p;
}

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