gtkradiant/tools/urt/libs/generic/static.cpp

#include "static.h"

#if defined( _DEBUG ) || defined( DOXYGEN )

namespace ExampleStatic
{
// Static example
// ---- myclass.h
class MyClass
{
public:
int value;
MyClass() : value( 3 ){
}
};

typedef Static<MyClass> StaticMyClass;

// ---- main.cpp
class DynamicInitialisation
{
public:
DynamicInitialisation(){
	// StaticMyClass::instance() may be invalid here because construction order is undefined
}
};

DynamicInitialisation g_dynamicInitialisation;

void duringMain(){
	int bar = StaticMyClass::instance().value;
}
// end example
}

namespace ExampleLazyStatic
{
// LazyStatic example
// ---- myclass.h
class MyClass
{
public:
int value;
MyClass() : value( 3 ){
}
// destructor will never be called
};

typedef LazyStatic<MyClass> StaticMyClass;

// ---- main.cpp
class DynamicInitialisation
{
public:
DynamicInitialisation(){
	int bar = StaticMyClass::instance().value;
}
};

DynamicInitialisation g_dynamicInitialisation;

void duringMain(){
	int bar = StaticMyClass::instance().value;
}
// end example
}

namespace ExampleSmartStatic
{
// SmartStatic example
// ---- myclass.h
class MyClass
{
public:
int value;
MyClass() : value( 3 ){
}
};

typedef CountedStatic<MyClass> StaticMyClass;

// ---- main.cpp
class DynamicInitialisation
{
public:
DynamicInitialisation(){
	// StaticMyClass::instance() is invalid before the ref is constructed
	SmartStatic<MyClass> ref;
	int bar = ref.instance().value;

	SmartStatic<MyClass> ref2;   // any number of instances are allowed.
}
};

DynamicInitialisation g_dynamicInitialisation;

void duringMain(){
	int bar = SmartStatic<MyClass>().instance().value; // an instance can be a temporary
}
// end example
}

#endif