Make0_with_creators.T
module Elt : sig ... end
The iter
argument to Container.Make
specifies how to implement the container's iter
function. `Define_using_fold
means to define iter
via:
iter t ~f = Container.iter ~fold t ~f
`Custom
overrides the default implementation, presumably with something more efficient. Several other functions returned by Container.Make
are defined in terms of iter
, so passing in a more efficient iter
will improve their efficiency as well.
val length : [ `Define_using_fold | `Custom of t -> int ]
The length
argument to Container.Make
specifies how to implement the container's length
function. `Define_using_fold
means to define length
via:
length t ~f = Container.length ~fold t ~f
`Custom
overrides the default implementation, presumably with something more efficient. Several other functions returned by Container.Make
are defined in terms of length
, so passing in a more efficient length
will improve their efficiency as well.