anchor.diff:    | MLTY_Named ([arg; _; _], p) when
       Syntax.string_of_mlpath p = "LowStar.Monotonic.Buffer.mbuffer" -> TBuf (translate_type env arg)
     | MLTY_Named ([arg], p) when
  +    Syntax.string_of_mlpath p = "FStar.Buffer.buffer" ||
       Syntax.string_of_mlpath p = "LowStar.Buffer.buffer" ||
  -    Syntax.string_of_mlpath p = "FStar.Buffer.buffer" ||
       Syntax.string_of_mlpath p = "FStar.HyperStack.reference" ||
       Syntax.string_of_mlpath p = "FStar.HyperStack.stackref" ||
       Syntax.string_of_mlpath p = "FStar.HyperStack.ref" ||
  
positive.code:   (* All the distinguished combinators that correspond to allocation, either on
     * the stack, on the heap (GC'd or manually-managed). *)
    | MLE_App ({ expr = MLE_TApp({ expr = MLE_Name p }, _) } , [ e1; e2 ])
      when (string_of_mlpath p = "FStar.Buffer.create" || string_of_mlpath p = "LowStar.Buffer.alloca" ||
            string_of_mlpath p = "LowStar.Monotonic.Buffer.malloca") ->
        EBufCreate (Stack, translate_expr env e1, translate_expr env e2)
  
    | MLE_App ({ expr = MLE_TApp({ expr = MLE_Name p }, _) } , [ init ])
  
negative.code:       EBufCreate (Stack, translate_expr env init, EConstant (UInt32, "1"))
  
    | MLE_App ({ expr = MLE_TApp({ expr = MLE_Name p }, _) }, [ e2 ])
      when (string_of_mlpath p = "FStar.Buffer.createL" || string_of_mlpath p = "LowStar.Monotonic.Buffer.malloca_of_list") ->
        EBufCreateL (Stack, List.map (translate_expr env) (list_elements e2))
  
    | MLE_App ({ expr = MLE_TApp({ expr = MLE_Name p }, _) }, [ _; e2 ])
      when string_of_mlpath p = "LowStar.Monotonic.Buffer.mgcmalloc_of_list" ||
           string_of_mlpath p = "LowStar.Buffer.gcmalloc_of_list" ->
        EBufCreateL (Eternal, List.map (translate_expr env) (list_elements e2))
  
    | MLE_App ({ expr = MLE_TApp({ expr = MLE_Name p }, _) } , [ _rid; init ])
  