Module `Evd.Store`

Datatype used to store additional information in evar maps.

type t: Type of stores

type 'a field: Type of field of such stores

val field : unit -> 'a field: Create a new field

val empty : t: Empty store

val set : t -> 'a field -> 'a -> t: Set a field

val get : t -> 'a field -> 'a option: Get the value of a field, if any

val remove : t -> 'a field -> t: Unset the value of the field

val merge : t -> t -> t: merge s1 s2 adds all the fields of s1 into s2.