#include <toast/typed_factory.hpp>
A typed_factory holds copies of arguments that can later be used to construct an object of the specified type. typed_factory derives from boost::typed_in_place_factory so it can be used to initialize a boost::optional for a type that is non-copyable.
This class exists for two reasons:
1. boost's typed factory forces you to pass by reference. With toast::typed_factory you can use boost::ref instead.
2. boost's typed factory pre-boost-1.35 was missing a nullary version.
For examples of use, see unintrusive_ptr's unit test. Although not listed above (because Doxygen doesn't interact well with Boost's preprocessor library), typed_factory has constructors of up to TOAST_MAX_TYPED_FACTORY_ARITY arity. You can define TOAST_MAX_TYPED_FACTORY_ARITY yourself to set the maximum value, otherwise it will default to 10.
Public Types | |
| typedef T | value_type |
Public Member Functions | |
| T * | create () const |
| void | apply (void *addr) const |
| T* typed_factory< T >::create | ( | ) | const [inline] |
Return a new object using the factory function that the user is responsible for managing
| void typed_factory< T >::apply | ( | void * | addr | ) | const [inline] |
Initialize the given address with the factory function. The address must have been allocated by the user prior to calling apply and be large enough to hold T.