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Add relaxed init-context in which we're willing to auto-deref.

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This commit is contained in:
Graydon Hoare 2010-06-30 21:00:09 -07:00
parent f6fda46020
commit edfcd3a723
1 changed files with 10 additions and 5 deletions
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15
src/boot/me/type.ml
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@ -191,6 +191,11 @@ let lval_ctx =
mut_ok = true }
;;
let init_ctx =
{ ext_ok = true;
mut_ok = true }
;;
let strict_ctx =
{ ext_ok = false;
mut_ok = false }
@ -1150,7 +1155,7 @@ let process_crate (cx:ctxt) (crate:Ast.crate) : unit =
let tvbase = any() in
unify_lval rval_ctx base tvbase;
unify_tyvars rval_ctx tvrec tvbase;
unify_lval lval_ctx dst tvrec
unify_lval init_ctx dst tvrec
| Ast.STMT_init_rec (dst, fields, None) ->
let dct = Hashtbl.create 10 in
@ -1160,7 +1165,7 @@ let process_crate (cx:ctxt) (crate:Ast.crate) : unit =
Hashtbl.add dct ident tv
in
Array.iter add_field fields;
unify_lval lval_ctx dst (ref (TYSPEC_record dct))
unify_lval init_ctx dst (ref (TYSPEC_record dct))
| Ast.STMT_init_tup (dst, members) ->
let member_to_tv atom =
@ -1169,16 +1174,16 @@ let process_crate (cx:ctxt) (crate:Ast.crate) : unit =
tv
in
let member_tvs = Array.map member_to_tv members in
unify_lval lval_ctx dst (ref (TYSPEC_tuple member_tvs))
unify_lval init_ctx dst (ref (TYSPEC_tuple member_tvs))
| Ast.STMT_init_vec (dst, atoms) ->
let tv = any() in
let unify_with_tv atom = unify_atom rval_ctx atom tv in
Array.iter unify_with_tv atoms;
unify_lval lval_ctx dst (ref (TYSPEC_vector tv))
unify_lval init_ctx dst (ref (TYSPEC_vector tv))
| Ast.STMT_init_str (dst, _) ->
unify_lval lval_ctx dst (ty Ast.TY_str)
unify_lval init_ctx dst (ty Ast.TY_str)
| Ast.STMT_copy (dst, expr) ->
let tv = any() in