(*
 * 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.
 *)

open Scope

type t = Scope.t list

val peek_scope : unit -> Scope.t

val peek_env : unit -> t

val clone_env : t -> t

val string_of_env : Context.t -> t -> string

val var_scope_kind : unit -> Scope.var_scope_kind

val in_async_scope : unit -> bool

val in_generator_scope : unit -> bool

val in_predicate_scope : unit -> bool

val all_entries : unit -> Entry.t SMap.t

val find_entry : Context.t -> string -> ?desc:Reason.reason_desc -> ALoc.t -> Scope.t * Entry.t

val peek_frame : unit -> int

val push_var_scope : Context.t -> Scope.t -> unit

val pop_var_scope : unit -> unit

val retrieve_closure_changeset : unit -> Changeset.t

val in_lex_scope : Context.t -> (unit -> 'a) -> 'a

val env_depth : unit -> int

val trunc_env : int -> unit

val init_env : ?exclude_syms:SSet.t -> Context.t -> Scope.t -> unit

val update_env : Context.t -> ALoc.t -> t -> unit

(***)

val promote_to_const_like : Context.t -> ALoc.t -> bool

val bind_class : Context.t -> ALoc.id -> Type.Properties.id -> Type.Properties.id -> unit

val bind_var : ?state:State.t -> Context.t -> string -> Type.t -> ALoc.t -> unit

val bind_let : ?state:State.t -> Context.t -> string -> Type.t -> ALoc.t -> unit

val bind_implicit_let :
  ?state:State.t -> Entry.let_binding_kind -> Context.t -> string -> Type.t -> ALoc.t -> unit

val bind_fun : ?state:State.t -> Context.t -> string -> Type.t -> ALoc.t -> unit

val bind_implicit_const :
  ?state:State.t -> Entry.const_binding_kind -> Context.t -> string -> Type.t -> ALoc.t -> unit

val bind_const : ?state:State.t -> Context.t -> string -> Type.t -> ALoc.t -> unit

val bind_import : Context.t -> string -> Type.t -> ALoc.t -> unit

val bind_type : ?state:State.t -> Context.t -> string -> Type.t -> ALoc.t -> unit

val bind_import_type : Context.t -> string -> Type.t -> ALoc.t -> unit

val bind_declare_var : Context.t -> string -> Type.t -> ALoc.t -> unit

val bind_declare_fun : Context.t -> string -> Type.t -> ALoc.t -> unit

val declare_let : Context.t -> string -> ALoc.t -> unit

val declare_implicit_let : Entry.let_binding_kind -> Context.t -> string -> ALoc.t -> unit

val declare_const : Context.t -> string -> ALoc.t -> unit

val declare_implicit_const : Entry.const_binding_kind -> Context.t -> string -> ALoc.t -> unit

val init_var :
  Context.t -> use_op:Type.use_op -> string -> has_anno:bool -> Type.t -> ALoc.t -> unit

val init_let :
  Context.t -> use_op:Type.use_op -> string -> has_anno:bool -> Type.t -> ALoc.t -> unit

val init_implicit_let :
  Entry.let_binding_kind ->
  Context.t ->
  use_op:Type.use_op ->
  string ->
  has_anno:bool ->
  Type.t ->
  ALoc.t ->
  unit

val init_fun : Context.t -> use_op:Type.use_op -> string -> Type.t -> ALoc.t -> unit

val init_const :
  Context.t -> use_op:Type.use_op -> string -> has_anno:bool -> Type.t -> ALoc.t -> unit

val init_implicit_const :
  Entry.const_binding_kind ->
  Context.t ->
  use_op:Type.use_op ->
  string ->
  has_anno:bool ->
  Type.t ->
  ALoc.t ->
  unit

val init_type : Context.t -> string -> Type.t -> ALoc.t -> unit

val pseudo_init_declared_type : Context.t -> string -> ALoc.t -> unit

module LookupMode : sig
  type t =
    | ForValue
    | ForType
    | ForTypeof
end

val local_scope_entry_exists : string -> bool

val get_env_entry : string -> t -> Scope.Entry.t option

val get_current_env_entry : string -> Scope.Entry.t option

val get_env_refi : Key.t -> t -> Scope.refi_binding option

val get_current_env_refi : Key.t -> Scope.refi_binding option

val get_class_entries : unit -> Type.class_binding list

val get_var : ?lookup_mode:LookupMode.t -> Context.t -> string -> ALoc.t -> Type.t

val get_internal_var : Context.t -> string -> ALoc.t -> Type.t

val get_var_declared_type : ?lookup_mode:LookupMode.t -> Context.t -> string -> ALoc.t -> Type.t

val unify_declared_type : ?lookup_mode:LookupMode.t -> Context.t -> string -> Type.t -> unit

val unify_declared_fun_type : Context.t -> string -> ALoc.t -> Type.t -> unit

val var_ref :
  ?lookup_mode:LookupMode.t -> Context.t -> string -> ?desc:Reason.reason_desc -> ALoc.t -> Type.t

val query_var :
  ?lookup_mode:LookupMode.t -> Context.t -> string -> ?desc:Reason.reason_desc -> ALoc.t -> Type.t

val set_var :
  Context.t -> use_op:Type.use_op -> string -> Type.t -> ALoc.t -> Changeset.EntryRef.t option

val set_internal_var : Context.t -> string -> Type.t -> ALoc.t -> Changeset.EntryRef.t option

val set_expr : Key.t -> ALoc.t -> Type.t -> Type.t -> Changeset.RefiRef.t

val refine_with_preds :
  Context.t -> ALoc.t -> Type.predicate Key_map.t -> Type.t Key_map.t -> Changeset.t

val in_refined_env :
  Context.t -> ALoc.t -> Type.predicate Key_map.t -> Type.t Key_map.t -> (unit -> 'a) -> 'a

val merge_env : Context.t -> ALoc.t -> t * t * t -> Changeset.t -> unit

val widen_env : Context.t -> ALoc.t -> unit

val copy_env : Context.t -> ALoc.t -> t * t -> Changeset.t -> unit

val havoc_all : unit -> unit

val reset_current_activation : ALoc.t -> unit

val havoc_vars : Changeset.t -> unit

val havoc_heap_refinements : unit -> unit

val havoc_heap_refinements_with_propname : private_:bool -> string -> unit

val get_refinement : Context.t -> Key.t -> ALoc.t -> Type.t option

val is_global_var : Context.t -> string -> bool
