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41 lines
1.2 KiB
41 lines
1.2 KiB
(*
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* Copyright (c) 2016 - present Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*)
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open! IStd
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(** Single abstraction for all the kinds of variables in SIL *)
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type t = LogicalVar of Ident.t | ProgramVar of Pvar.t [@@deriving compare]
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let equal = [%compare.equal : t]
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let of_id id = LogicalVar id
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let of_pvar pvar = ProgramVar pvar
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let of_formal_index formal_index = of_id (Ident.create_footprint Ident.name_spec formal_index)
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let to_exp = function ProgramVar pvar -> Exp.Lvar pvar | LogicalVar id -> Exp.Var id
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let is_global = function ProgramVar pvar -> Pvar.is_global pvar | LogicalVar _ -> false
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let is_return = function ProgramVar pvar -> Pvar.is_return pvar | LogicalVar _ -> false
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let is_footprint = function ProgramVar _ -> false | LogicalVar id -> Ident.is_footprint id
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let pp fmt = function ProgramVar pv -> Pvar.pp Pp.text fmt pv | LogicalVar id -> Ident.pp fmt id
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module Map = PrettyPrintable.MakePPMap (struct
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type nonrec t = t
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let compare = compare
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let pp = pp
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end)
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