diff options
| -rw-r--r-- | src/comp/middle/typeck.rs | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/src/comp/middle/typeck.rs b/src/comp/middle/typeck.rs index 94bd41a674f..7f427c32318 100644 --- a/src/comp/middle/typeck.rs +++ b/src/comp/middle/typeck.rs @@ -1223,7 +1223,23 @@ fn check_expr(&fn_ctxt fcx, @ast.expr expr) -> @ast.expr { case (ast.expr_unary(?unop, ?oper, _)) { auto oper_1 = check_expr(fcx, oper); auto oper_t = expr_ty(oper_1); - // FIXME: Unops have a bit more subtlety than this. + alt (unop) { + case (ast.box) { oper_t = plain_ty(ty_box(oper_t)); } + case (ast.deref) { + alt (oper_t.struct) { + case (ty_box(?inner_t)) { + oper_t = inner_t; + } + case (_) { + fcx.ccx.sess.span_err + (expr.span, + "dereferencing non-box type: " + + ty_to_str(oper_t)); + } + } + } + case (_) { /* fall through */ } + } ret @fold.respan[ast.expr_](expr.span, ast.expr_unary(unop, oper_1, ast.ann_type(oper_t))); |