package rfsm

  1. Overview
  2. Docs
On This Page
  1. Environments
package rfsm
Legend:
Library
Module
Module type
Parameter
Class
Class type

Environments

type 'a t

The type of environments, mapping identifiers, of type Ident.t to values of type 'a

val empty : 'a t

The empty environment

val is_empty : 'a t -> bool

is_empty e is true iff e is empty

val bindings : 'a t -> (Ident.t * 'a) list

bindings e returns the list of bindings in e

val dom : 'a t -> Ident.t list

dom e returns the domain of e, i.e. the list of identifiers bounds in e

val init : (Ident.t * 'a) list -> 'a t

init builds an environment from a list of bindings

val add : Ident.t -> 'a -> 'a t -> 'a t

add i v e returns the environment obtained by adding binding i->v to e. The benavior is the same as for Stdlib.Map.S.add: if i was already bound in e to a value that is physically equal to v, e is returned unchanged. Otherwise, the previous binding of i in e disappears.

val union : 'a t -> 'a t -> 'a t

union e1 e2 returns the union of environments e1 and e2. If an identifier is bound both in e1 and e2, that from e1 disappears.

val mem : Ident.t -> 'a t -> bool

mem i e returns true if e contains a binding for i, false otherwise.

val find : Ident.t -> 'a t -> 'a

find i e returns the value bound to i in e. Raises Not_found if no binding for i exists.

val upd : Ident.t -> 'a -> 'a t -> 'a t

upd i v e returns a environment in which the value bound to i in e has been replaced by v. Returns e unchanged if i is not bound in e.

val filter : (Ident.t -> 'a -> bool) -> 'a t -> 'a t
val fold : (Ident.t -> 'a -> 'b -> 'b) -> 'a t -> 'b -> 'b
val iter : (Ident.t -> 'a -> unit) -> 'a t -> unit
val map : ('a -> 'b) -> 'a t -> 'b t

filter, fold, iter and map are the classical higher-order functions operating on environments.

val pp : ?sep:string -> ?vlayout:bool -> ?qual:bool -> (Stdlib.Format.formatter -> 'a -> unit) -> Stdlib.Format.formatter -> 'a t -> unit

pp p fmt e prints environment e using the formatter fmt and the pretty-printing function p for printing the bound values. Optional arguments sep, vlayout and qual are respectively used to specify

  • the binding symbol (default: "=")
  • whether bindings are printed on a single horizontal box (default) or on vertically aligned boxes
  • whether to print qualfied identifiers or not (default)
val pp_dom : pp_ident:(Stdlib.Format.formatter -> Ident.t -> unit) -> Stdlib.Format.formatter -> 'a t -> unit

pp_dom ~pp_ident fmt e printfs the domain of environment e using the formatter fmt and the pretty-printing function pp_ident to print identifiers

OCaml

Innovation. Community. Security.

GitHub Discord Twitter Peertube RSS
About
Changelog Releases Industrial Users Academic Users Why OCaml
Ecosystem
Packages Community Events OCaml Planet Jobs
Resources
Install OCaml Get Started Platform Tools Language Manual Standard Library API Books Exercises Papers OCaml Playground Logo
Policies
Carbon Footprint Governance Privacy Code of Conduct