Singleton Class Reference

A minimal singleton class implementation. More...

#include <ahSingleton.H>

Public Member Functions
Deleted copy and move operations
	Singleton (const Singleton &)=delete
	Singleton (Singleton &&)=delete
Singleton &	operator= (const Singleton &)=delete
Singleton &	operator= (Singleton &&)=delete

Static Public Member Functions
static Singleton &	get_instance () noexcept
	Returns the unique instance of the Singleton.

Private Member Functions
	Singleton ()=default
	Private constructor to prevent direct instantiation.

Detailed Description

A minimal singleton class implementation.

This class demonstrates the Meyers singleton pattern and can be used directly when a simple singleton with no additional state or behavior is needed.

For singletons with custom state or behavior, prefer using the Make_Singleton macro on your own class.

Example

Singleton & s1 = Singleton::get_instance();
Singleton & s2 = Singleton::get_instance();
assert(&s1 == &s2);  // Same instance

Thread Safety

Thread-safe initialization is guaranteed by the C++11 standard for function-local static variables.

See also

Make_Singleton

Definition at line 177 of file ahSingleton.H.

Constructor & Destructor Documentation

Singleton() [1/3]

Singleton::Singleton ( const Singleton &  )

delete

Singleton() [2/3]

Singleton::Singleton ( Singleton &&  )

delete

Singleton() [3/3]

Singleton::Singleton ( )

privatedefault

Private constructor to prevent direct instantiation.

Member Function Documentation

get_instance()

static Singleton & Singleton::get_instance ( )

inlinestaticnoexcept

Returns the unique instance of the Singleton.

The instance is created on the first call (lazy initialization) and the same instance is returned on all subsequent calls.

Returns

Reference to the singleton instance.

Note

Thread-safe: initialization is guaranteed to be thread-safe by the C++11 standard (function-local static).

Definition at line 191 of file ahSingleton.H.

Referenced by TEST(), and TEST().

operator=() [1/2]

Singleton & Singleton::operator= ( const Singleton &  )

delete

operator=() [2/2]

Singleton & Singleton::operator= ( Singleton &&  )

delete

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The documentation for this class was generated from the following file:

• ahSingleton.H