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-rw-r--r--src/Interpreter.ml9
1 files changed, 8 insertions, 1 deletions
diff --git a/src/Interpreter.ml b/src/Interpreter.ml
index 2fa1bea2..5db49935 100644
--- a/src/Interpreter.ml
+++ b/src/Interpreter.ml
@@ -3540,7 +3540,14 @@ let set_discriminant (config : C.config) (ctx : C.eval_ctx) (p : E.place)
(ctx, Unit)
| _, V.Symbolic _ ->
assert (config.mode = SymbolicMode);
- (* TODO *) raise Unimplemented
+ (* This is a bit annoying: in theory we should expand the symbolic value
+ * then set the discriminant, because in the case the discriminant is
+ * exactly the one we set, the fields are left untouched, and in the
+ * other cases they are set to Bottom.
+ * For now, we forbid setting the discriminant of a symbolic value:
+ * setting a discriminant should only be used to initialize a value,
+ * really. *)
+ failwith "Unexpected value"
| _, (V.Adt _ | V.Bottom) -> failwith "Inconsistent state"
| _, (V.Concrete _ | V.Borrow _ | V.Loan _) -> failwith "Unexpected value"