Am 21.02.2012 17:45, schrieb Florian Philipp:
> Hi list!
>
> Sorry if this is a dumb question but I cannot really figure this out:
> Can I use the exception_catch adaptor with slots that pass parameters?
> If the answer is yes, what is wrong with this code:
>
> class SlotExceptionHandler {
> void operator()();
> }
> SlotExceptionHandler* exception_handler;
> slot<bool, Glib::IOCondition> real_slot;
>
> slot<void> except_functor = mem_fun(*exception_handler,
> &SlotExceptionHandler::operator());
> slot<void, IOCondition> param_except = hide(except_functor);
> slot<bool, IOCondition> return_except = bind_return(param_except, true);
> slot<bool, IOCondition> combined_slot = exception_catch(real_slot,
> return_except);
>
> gcc aborts on the last line:
> /usr/include/sigc++-2.0/sigc++/adaptors/exception_catch.h:82: error: no
> match for call to ‘(sigc::slot<bool, Glib::IOCondition, sigc::nil,
> sigc::nil, sigc::nil, sigc::nil, sigc::nil, sigc::nil>) ()’
> /usr/include/sigc++-2.0/sigc++/functors/slot.h:512: note: candidates
> are: T_return sigc::slot1<T_return, T_arg1>::operator()(typename
> sigc::type_trait<T_derived>::take) const [with T_return = bool, T_arg1 =
> Glib::IOCondition]
>
> If it's relevant: This is a SuSE Enterprise distribution, GTK+ is around
> 2.18, Gnome 2.28. I cannot check the sigc version right now.
>
> Thanks in advance!
> Florian Philipp
>
>
Nevermind. I didn't realize the exception handling slot doesn't need to
have the same parameters as the real slot, just the same return value.
Regards,
Florian Philipp
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