Module Core_kernel.Moption

A Moption is a mutable option, like 'a option ref, but with a more efficient implementation; in particular, set_some does not allocate.

type 'a t

include sig ... end

val sexp_of_t : ('a ‑> Base.Sexp.t) ‑> 'a t ‑> Base.Sexp.t

include Core_kernel__.Import.Invariant.S1 with type a t := a t

type 'a t

val invariant : 'a Base__.Invariant_intf.inv ‑> 'a t Base__.Invariant_intf.inv

module Optional_syntax : Optional_syntax.S1 with type a t := a t with type a value := a Core_kernel__.Import.identity

val create : Core_kernel__.Import.unit ‑> _ t

val is_none : _ t ‑> Core_kernel__.Import.bool

val is_some : _ t ‑> Core_kernel__.Import.bool

val get : 'a t ‑> 'a Core_kernel__.Import.option

val get_some_exn : 'a t ‑> 'a

val unsafe_get : 'a t ‑> 'a

Does not check that is_some before unsafely accessing the stored value

val set : 'a t ‑> 'a Core_kernel__.Import.option ‑> Core_kernel__.Import.unit

val set_none : _ t ‑> Core_kernel__.Import.unit

val set_some : 'a t ‑> 'a ‑> Core_kernel__.Import.unit