
shelf_size(+ShelfHandle, -Size)

   Get the number of slots of a shelf object

Arguments
   ShelfHandle         A shelf handle or shelf name
   Size                A variable or integer (output)

Type
   Non-logical Variables, Arrays, Bags, Shelves and Stores

Description
	Retrieves the fixed number of slots that the shelf was created with.
	The slots are numbered from 1 to Size.

	Note: If ShelfHandle is not a handle, then it must be an atom or a
	compound term, and the shelf is identified by this term's toplevel
	functor together with the context module.


Modes and Determinism
   shelf_size(+, -) is det

Modules
   This predicate is sensitive to its module context (tool predicate, see @/2).

Exceptions
     4 --- ShelfHandle is not instantiated
     5 --- ShelfHandle is not a shelf
    40 --- ShelfHandle refers to an already destroyed shelf

Examples
   
    ?- shelf_create(foo(0,0,0), Shelf),
       shelf_size(Shelf, Size).

    Shelf = $&(shelf,"36nzz7")
    S = 3
    Yes (0.00s cpu)
    

See Also
   shelf_create / 2, shelf_create / 3
