Module type Base__.Hashtbl_intf.Multi

type ('a, 'b) t
type 'a key
val add_multi : ('a'b list) t ‑> key:'a key ‑> data:'b ‑> unit

add_multi t ~key ~data if key is present in the table then cons data on the list, otherwise add key with a single element list.

val remove_multi : ('a_ list) t ‑> 'a key ‑> unit

remove_multi t key updates the table, removing the head of the list bound to key. If the list has only one element (or is empty) then the binding is removed.

val find_multi : ('a'b list) t ‑> 'a key ‑> 'b list

find_multi t key returns the empty list if key is not present in the table, returns t's values for key otherwise