A list-update policy that unconditionally moves elements to the front of the list.
Defined in: list_update_policy.hpp
| Parameter | Description | Default Value | 
| class Allocator | Allocator type. This is used only for definitions, e.g., the size type. | std::allocator<char> | 
| Type | Definition | Description | 
| allocator | Allocator | Allocator type. | 
| Type | Definition | Description | 
| metadata_type | null_lu_metadata | Metadata on which this functor operates. In this case, none. | 
| metadata_reference | typename Allocator::template rebind< metadata_type>::other::reference | Reference to metadata on which this functor operates. | 
| Method | Description | 
| metadata_type operator() () const | Creates a metadata object. | 
| inline bool operator() (metadata_reference r_metadata) const | Decides whether a metadata object should be moved to the front of the list. |