ARK>>Непонятно. Это все не нужно. GetIter не должен завершаться с ошибкой.

for (Iter i : data)
{
    X x;
    if (i.Get(x))
    {
        ...
    }
}
if (data.IteratorCorrupted)
{
    ...
}

Because that error right there? No compiler error, no warning, you lose. You just have to be trained well enough to watch for them and prevent them. Very insidious bugs if you don't know what you're doing. One of the design philosophies of C++ is speed over safety. The runtime check that would lead iterator invalidation to an exception instead of unspecified behavior is too expensive, in the view of C++ language designers.

    error = sAIPanelFlyoutMenu->AppendItem(fPanelFlyoutMenu, 1, ai::UnicodeString("First Item"));
    error = sAIPanelFlyoutMenu->AppendItem(fPanelFlyoutMenu, 3, ai::UnicodeString("Third Item"));
    error = sAIPanelFlyoutMenu->InsertItem(fPanelFlyoutMenu, 3, 2, ai::UnicodeString("Second Item"));
    error = sAIPanelFlyoutMenu->InsertSeparator(fPanelFlyoutMenu, 3, 5);
    error = sAIPanelFlyoutMenu->AppendItem(fPanelFlyoutMenu, 4, ai::UnicodeString("Fourth Item"));

class Frobber
{
private:
    int m_NumberOfFrobs;
    FrobManager m_FrobManager;

public:

    void Frob()
    {
        m_NumberOfFrobs++;

        m_FrobManager.HandleFrob(new FrobObject());
    }
};

A>    error = sAIPanelFlyoutMenu->AppendItem(fPanelFlyoutMenu, 1, ai::UnicodeString("First Item"));
A>    error = sAIPanelFlyoutMenu->AppendItem(fPanelFlyoutMenu, 3, ai::UnicodeString("Third Item"));
A>    error = sAIPanelFlyoutMenu->InsertItem(fPanelFlyoutMenu, 3, 2, ai::UnicodeString("Second Item"));
A>    error = sAIPanelFlyoutMenu->InsertSeparator(fPanelFlyoutMenu, 3, 5);
A>    error = sAIPanelFlyoutMenu->AppendItem(fPanelFlyoutMenu, 4, ai::UnicodeString("Fourth Item"));
A>

%% Для варианта 1 и 2 ниже
%% нам нужен список элементов и функция, их добавляющая

list_of_items() ->
  ["First Item", "Third Item", separator, "Fourth Item"].

add_to_menu(Item) ->
  try
    fly_out_menu:append_item(panel_flyout_menu, Item)
  catch
    _:Reason -> {error, Reason}
  end.

%% ------------------------
%% Вариант 1
%% лопатим вручную
safe_add([], Errors) ->
  case Errors of
    [] -> ok;
    _ -> %% обработали ошибки, если надо
  end;
safe_add([Item|Rest], Errors) ->
  case add_to_menu(Item) of
    ok -> safe_add(Rest, Errors);
    {error, Reason} = safe_add(Rest, [Reason | Errors])
  end.

%% и дальше в коде где-то

safe_add(list_of_items()).

%% ------------------------
%% Вариант 2
%% foldl

safe_add(Item, Errors) ->
  case add_to_menu(Item) of
    ok -> Errors;
    {error, Reason} -> [Reason | Errors]
  end.

%% где-то в коде
  case lists:foldl(fun safe_add/2, [], list_of_items()) of
    [] -> ok;
    Errors -> %% обрабатываем все ошибки
  end.

%% ------------------------
%% Вариант 3
%% Один в один код из Адоба

adobe_style_adъ() ->
 % игнорируем ошибки
 catch fly_out_menu:append_item(panel_flyout_menu, "First Item"),
 catch fly_out_menu:append_item(panel_flyout_menu, "Third Item"),
 catch fly_out_menu:append_item(panel_flyout_menu, "Second Item"),
 catch fly_out_menu:append_item(panel_flyout_menu, separator),
 
 % не игнорируем ошибки
 fly_out_menu:append_item(panel_flyout_menu, "First Item").

%% где-то дальше в коде
try 
  adobe_style_adъ()
catch 
  _:Reason -> %обработали ошибку