`type ('a, 'b, 'c) t constraint 'c = [< `Read | `Write ]`

The type of a hashtable.

## Constructors

`val create : int -> ('a, 'b, _) t`
`val of_table : ('a, 'b) Stdlib.Hashtbl.t -> ('a, 'b, _) t`

Adopt a regular hashtable as a capability hashtble, allowing to decrease capabilities if necessary.

This operation involves no copying. In other words, in `let cap = of_table a in ...`, any modification in `a` will also have effect on `cap` and reciprocally.

`val to_table : ('a, 'b, [ `Read | `Write ]) t -> ('a, 'b) Stdlib.Hashtbl.t`

Return a capability hashtable as a regular hashtable.

This operation requires both read and write permissions on the capability table and involves no copying. In other words, in `let a = of_table cap in ...`, any modification in `a` will also have effect on `cap` and reciprocally.

`val read_only : ('a, 'b, [> `Read ]) t -> ('a, 'b, [ `Read ]) t`

Drop to read-only permissions.

This operation involves no copying.

`val write_only : ('a, 'b, [> `Write ]) t -> ('a, 'b, [ `Write ]) t`

Drop to write-only permissions.

This operation involves no copying.

## Base operations

`val length : ('a, 'b, _) t -> int`
`val is_empty : ('a, 'b, _) t -> bool`
`val add : ('a, 'b, [> `Write ]) t -> 'a -> 'b -> unit`
`val remove : ('a, 'b, [> `Write ]) t -> 'a -> unit`
`val remove_all : ('a, 'b, [> `Write ]) t -> 'a -> unit`
`val replace : ('a, 'b, [> `Write ]) t -> 'a -> 'b -> unit`
`val copy : ('a, 'b, [> `Read ]) t -> ('a, 'b, _) t`
`val clear : ('a, 'b, [> `Write ]) t -> unit`
`val stats : ('a, 'b, _) t -> statistics`

## Searching

`val find : ('a, 'b, [> `Read ]) t -> 'a -> 'b`
`val find_all : ('a, 'b, [> `Read ]) t -> 'a -> 'b list`
`val find_default : ('a, 'b, [> `Read ]) t -> 'a -> 'b -> 'b`
`val find_option : ('a, 'b, [> `Read ]) t -> 'a -> 'b option`
`val exists : ('a -> 'b -> bool) -> ('a, 'b, [> `Read ]) t -> bool`
`val mem : ('a, 'b, [> `Read ]) t -> 'a -> bool`

## Traversing

`val iter : ('a -> 'b -> unit) -> ('a, 'b, [> `Read ]) t -> unit`
`val for_all : ('a -> 'b -> bool) -> ('a, 'b, [> `Read ]) t -> bool`
`val fold : ('a -> 'b -> 'c -> 'c) -> ('a, 'b, [> `Read ]) t -> 'c -> 'c`
`val map : ('a -> 'b -> 'c) -> ('a, 'b, [> `Read ]) t -> ('a, 'c, _) t`
`val map_inplace : ('a -> 'b -> 'b) -> ('a, 'b, [> `Write ]) t -> unit`
`val filter : ('a -> bool) -> ('key, 'a, [> `Read ]) t -> ('key, 'a, _) t`
`val filter_inplace : ('a -> bool) -> ('key, 'a, [> `Write ]) t -> unit`
`val filteri : ('key -> 'a -> bool) -> ('key, 'a, [> `Read ]) t -> ('key, 'a, _) t`
`val filteri_inplace : ('key -> 'a -> bool) -> ('key, 'a, [> `Write ]) t -> unit`
`val filter_map : ('key -> 'a -> 'b option) -> ('key, 'a, [> `Read ]) t -> ('key, 'b, _) t`
`val filter_map_inplace : ('key -> 'a -> 'a option) -> ('key, 'a, [> `Write ]) t -> unit`
`val merge : ('key -> 'a option -> 'b option -> 'c option) -> ('key, 'a, [> `Read ]) t -> ('key, 'b, [> `Read ]) t -> ('key, 'c, _) t`
`val merge_all : ('key -> 'a list -> 'b list -> 'c list) -> ('key, 'a, [> `Read ]) t -> ('key, 'b, [> `Read ]) t -> ('key, 'c, _) t`

## Conversions

`val keys : ('a, 'b, [> `Read ]) t -> 'a BatEnum.t`
`val values : ('a, 'b, [> `Read ]) t -> 'b BatEnum.t`
`val enum : ('a, 'b, [> `Read ]) t -> ('a * 'b) BatEnum.t`
`val of_enum : ('a * 'b) BatEnum.t -> ('a, 'b, _) t`
`val to_list : ('a, 'b, [> `Read ]) t -> ('a * 'b) list`
`val of_list : ('a * 'b) list -> ('a, 'b, _) t`

## Boilerplate code

### Printing

`val print : ?first:string -> ?last:string -> ?sep:string -> ?kvsep:string -> ('a BatInnerIO.output -> 'b -> unit) -> ('a BatInnerIO.output -> 'c -> unit) -> 'a BatInnerIO.output -> ('b, 'c, [> `Read ]) t -> unit`

## Override modules

`module Exceptionless : sig ... end`

Operations on `BatHashtbl.Cap` without exceptions.

`module Labels : sig ... end`

Operations on `BatHashtbl.Cap` with labels.