diff options
Diffstat (limited to 'src/Interpreter.ml')
| -rw-r--r-- | src/Interpreter.ml | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/src/Interpreter.ml b/src/Interpreter.ml index 17dd14a4..ee64ec29 100644 --- a/src/Interpreter.ml +++ b/src/Interpreter.ml @@ -2118,7 +2118,12 @@ let promote_shared_loan_to_mut_loan (l : V.BorrowId.id) (ctx : C.eval_ctx) : let ctx = update_loan ek l (V.MutLoan l) ctx in (* Return *) (ctx, sv) - | _, Abstract _ -> raise Unimplemented + | _, Abstract _ -> + (* I don't think it is possible to have two-phase borrows involving borrows + * returned by abstractions. I'm not sure how we could handle that anyway. *) + failwith + "Can't promote a shared loan to a mutable loan if the loan is inside \ + an abstraction" (** Helper function: see [activate_inactivated_mut_borrow]. @@ -2138,7 +2143,11 @@ let promote_inactivated_borrow_to_mut_borrow (l : V.BorrowId.id) | Concrete (V.InactivatedMutBorrow _) -> (* Update it *) update_borrow ek l (V.MutBorrow (l, borrowed_value)) ctx - | Abstract _ -> raise Unimplemented + | Abstract _ -> + (* This can't happen for sure *) + failwith + "Can't promote a shared borrow to a mutable borrow if the borrow is \ + inside an abstraction" (** Promote an inactivated mut borrow to a mut borrow. @@ -2187,7 +2196,12 @@ let rec activate_inactivated_mut_borrow (config : C.config) (io : inner_outer) [promote_shared_loan_to_mut_loan] *) promote_inactivated_borrow_to_mut_borrow l borrowed_value ctx) - | _, Abstract _ -> raise Unimplemented + | _, Abstract _ -> + (* I don't think it is possible to have two-phase borrows involving borrows + * returned by abstractions. I'm not sure how we could handle that anyway. *) + failwith + "Can't activate an inactivated mutable borrow referencing a loan inside\n\ + \ an abstraction" (** Paths *) |