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Stop using project_lval_ty_from_slot for lval_ty; cover residual un-caught cases in type.ml.

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This commit is contained in:
Graydon Hoare 2010-07-23 13:51:56 -07:00
parent ac228a59ce
commit 62b69503d5
2 changed files with 19 additions and 15 deletions
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12
src/boot/me/semant.ml
View File

@ -1206,18 +1206,10 @@ let rec project_lval_ty_from_slot (cx:ctxt) (lval:Ast.lval) : Ast.ty =
let lval_ty (cx:ctxt) (lval:Ast.lval) : Ast.ty =
(*
FIXME: The correct definition of this function is just:
Hashtbl.find cx.ctxt_all_lval_types (lval_base_id lval)
However, since the typechecker is not presently handling
every stmt, we have a fallback mode to "pick out the slot
type and hope for the best".
*)
match htab_search cx.ctxt_all_lval_types (lval_base_id lval) with
Some t -> t
| None -> project_lval_ty_from_slot cx lval
| None -> bugi cx (lval_base_id lval) "no type for lval %a"
Ast.sprintf_lval lval
;;
let lval_is_static (cx:ctxt) (lval:Ast.lval) : bool =

22
src/boot/me/type.ml
View File

@ -509,7 +509,8 @@ let check_stmt (cx:Semant.ctxt) : (fn_ctx -> Ast.stmt -> unit) =
end;
if n_boxes > 1 then
(* TODO: allow more than one level of automatic dereference *)
Common.err None "sorry, only one level of automatic dereference is \
Common.unimpl (Some (Semant.lval_base_id lval))
"sorry, only one level of automatic dereference is \
implemented; please add explicit dereference operators";
Hashtbl.replace cx.Semant.ctxt_auto_deref_lval lval_id (n_boxes > 0);
@ -690,13 +691,19 @@ let check_stmt (cx:Semant.ctxt) : (fn_ctx -> Ast.stmt -> unit) =
| Ast.STMT_new_str (dst, _) -> infer_lval Ast.TY_str dst
| Ast.STMT_new_port _ -> () (* we can't actually typecheck this *)
| Ast.STMT_new_port dst ->
(* we can't actually typecheck this *)
ignore (check_lval dst);
()
| Ast.STMT_new_chan (dst, Some port) ->
let ty = Ast.TY_chan (demand_port (check_lval port)) in
infer_lval ty dst
| Ast.STMT_new_chan (_, None) -> () (* can't check this either *)
| Ast.STMT_new_chan (dst, None) ->
(* can't check this either *)
ignore (check_lval dst);
()
| Ast.STMT_new_box (dst, mut, src) ->
let ty = Ast.TY_box (maybe_mutable mut (check_atom src)) in
@ -818,8 +825,13 @@ let check_stmt (cx:Semant.ctxt) : (fn_ctx -> Ast.stmt -> unit) =
let value_ty = demand_chan (check_lval chan) in
infer_lval ~mut:Ast.MUT_immutable value_ty value
| Ast.STMT_log _ | Ast.STMT_note _ | Ast.STMT_prove _ ->
() (* always well-typed *)
| Ast.STMT_log x | Ast.STMT_note x ->
(* always well-typed, just record type in passing. *)
ignore (check_atom x)
| Ast.STMT_prove _ ->
(* always well-typed, static. Ignore. *)
()
| Ast.STMT_check (_, calls) -> check_check_calls calls