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open Utils
open TypesUtils
open Types
open Values
exception FoundSymbolicValue of symbolic_value
(** Utility exception *)
let mk_unit_value : typed_value =
{ value = Adt { variant_id = None; field_values = [] }; ty = mk_unit_ty }
let mk_typed_value (ty : ety) (value : value) : typed_value = { value; ty }
let mk_bottom (ty : ety) : typed_value = { value = Bottom; ty }
(** Box a value *)
let mk_box_value (v : typed_value) : typed_value =
let box_ty = mk_box_ty v.ty in
let box_v = Adt { variant_id = None; field_values = [ v ] } in
mk_typed_value box_ty box_v
let is_symbolic (v : value) : bool =
match v with Symbolic _ -> true | _ -> false
let as_symbolic (v : value) : symbolic_value =
match v with Symbolic s -> s | _ -> failwith "Unexpected"
(** Check if a value contains a borrow *)
let borrows_in_value (v : typed_value) : bool =
let obj =
object
inherit [_] iter_typed_value
method! visit_borrow_content _env _ = raise Found
end
in
(* We use exceptions *)
try
obj#visit_typed_value () v;
false
with Found -> true
(** Check if a value contains inactivated mutable borrows *)
let inactivated_in_value (v : typed_value) : bool =
let obj =
object
inherit [_] iter_typed_value
method! visit_InactivatedMutBorrow _env _ = raise Found
end
in
(* We use exceptions *)
try
obj#visit_typed_value () v;
false
with Found -> true
(** Check if a value contains a loan *)
let loans_in_value (v : typed_value) : bool =
let obj =
object
inherit [_] iter_typed_value
method! visit_loan_content _env _ = raise Found
end
in
(* We use exceptions *)
try
obj#visit_typed_value () v;
false
with Found -> true
(** Check if a value contains outer loans (i.e., loans which are not in borrwed
values. *)
let outer_loans_in_value (v : typed_value) : bool =
let obj =
object
inherit [_] iter_typed_value
method! visit_loan_content _env _ = raise Found
method! visit_borrow_content _ _ = ()
end
in
(* We use exceptions *)
try
obj#visit_typed_value () v;
false
with Found -> true
let find_first_primitively_copyable_sv (v : typed_value) : symbolic_value option
=
(* The visitor *)
let obj =
object
inherit [_] iter_typed_value
method! visit_Symbolic _ sv =
let ty = sv.sv_ty in
if type_is_primitively_copyable ty && ty_has_regions ty then
raise (FoundSymbolicValue sv)
else ()
end
in
(* Small helper *)
try
obj#visit_typed_value () v;
None
with FoundSymbolicValue sv -> Some sv
|
