A.18.31 The Generic Package Containers.Bounded_Priority_Queues

with System;
with Ada.Containers.Synchronized_Queue_Interfaces;
generic
with package Queue_Interfaces is new Ada.Containers.Synchronized_Queue_Interfaces (<>);
type Queue_Priority is private;
with function Get_Priority
(Element : Queue_Interfaces.Element_Type) return Queue_Priority is <>;
with function Before
(Left, Right : Queue_Priority) return Boolean is <>;
Default_Capacity : Count_Type;
Default_Ceiling : System.Any_Priority := System.Priority'Last;
package Ada.Containers.Bounded_Priority_Queues is
pragma Preelaborate(Bounded_Priority_Queues);

package Implementation is
... -- not specified by the language
end Implementation;

protected type Queue
(Capacity : Count_Type := Default_Capacity;
Ceiling : System.Any_Priority := Default_Ceiling)
with Priority => Ceiling is
new Queue_Interfaces.Queue with

overriding
entry Enqueue (New_Item : in Queue_Interfaces.Element_Type);
overriding
entry Dequeue (Element : out Queue_Interfaces.Element_Type);

not overriding
procedure Dequeue_Only_High_Priority
(At_Least : in Queue_Priority;
Element : in out Queue_Interfaces.Element_Type;
Success : out Boolean);

overriding
function Current_Use return Count_Type;
overriding
function Peak_Use return Count_Type;

private
... -- not specified by the language
end Queue;

... -- not specified by the language

end Ada.Containers.Bounded_Priority_Queues;