(*
 * Copyright (c) 2009-2013, Monoidics ltd.
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *)

(** The Smallfoot Intermediate Language: Decompiled Expressions *)

open! IStd
module F = Format

(** expression representing the result of decompilation *)
type t =
  | Darray of t * t
  | Dbinop of Binop.t * t * t
  | Dconst of Const.t
  | Dsizeof of Typ.t * t option * Subtype.t
  | Dderef of t
  | Dfcall of t * t list * Location.t * CallFlags.t
  | Darrow of t * Fieldname.t
  | Ddot of t * Fieldname.t
  | Dpvar of Pvar.t
  | Dpvaraddr of Pvar.t
  | Dunop of Unop.t * t
  | Dunknown
  | Dretcall of t * t list * Location.t * CallFlags.t

(** Value paths: identify an occurrence of a value in a symbolic heap each expression represents a
    path, with Dpvar being the simplest one *)
type vpath = t option

val pp : F.formatter -> t -> unit

val to_string : t -> string
(** convert to a string *)

val pp_vpath : Pp.env -> F.formatter -> vpath -> unit
(** Pretty print a value path *)

val has_tmp_var : t -> bool
(** return true if [dexp] contains a temporary pvar *)