Function getSingleInstance
Summary
#include <lib/inc/drogon/DrClassMap.h>
(1) static const std::shared_ptr< DrObjectBase > & getSingleInstance(const std::string &className)
(2) template <typename T>
static std::shared_ptr< T > getSingleInstance()
Function overload
Synopsis
#include <lib/inc/drogon/DrClassMap.h>
static const std::shared_ptr< DrObjectBase > & getSingleInstance(const std::string &className)
Description
Get the singleton object of the class named by className.
- Parameters:
className- The name of the class- Return
- const std::shared_ptr<DrObjectBase>& The smart pointer to the instance.
Source
Line 66 in lib/inc/drogon/DrClassMap.h.
Synopsis
#include <lib/inc/drogon/DrClassMap.h>
template <typename T>
static std::shared_ptr< T > getSingleInstance()
Description
Get the singleton T type object.
- Template Parameters:
T- The type of the class- Return
- std::shared_ptr<T> The smart pointer to the instance.
- Note
- The T must be a subclass of the DrObjectBase class.
Source
Lines 76-85 in lib/inc/drogon/DrClassMap.h.
template <typename T>
static std::shared_ptr<T> getSingleInstance()
{
static_assert(std::is_base_of<DrObjectBase, T>::value,
"T must be a sub-class of DrObjectBase");
static auto const singleton =
std::dynamic_pointer_cast<T>(getSingleInstance(T::classTypeName()));
assert(singleton);
return singleton;
}