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Subject: Re: [boost] Interest in non-intrusive signal/slot lib?
From: Vicente J. Botet Escriba (vicente.botet_at_[hidden])
Date: 2015-05-20 11:17:41

Le 20/05/15 15:25, Sylvester-Bradley, Gareth a écrit :
> On 20 May 2015 14:13, Vicente J. Botet Escriba wrote:
>> I have some concerns about the lifetime of the emitters.
>> E.g. an application can have a class that contains a several possible emitters. The lifetime of all the
>> emitters depends on the lifetime of the C instance.
>> struct C {
>> T1 e1;
>> T2 e2;
>> };
>> int main() {
>> shared_ptr<C> c = make_shared<C>();
>> // ...
>> The lifetime of emitters c->e1 and c->e2 is managed by c.
>> Now I would like to connect to c->e1 and/or c->e2. But I would need to change the class C, as I don't > have a shared_ptr to &(c->e1) or &(c->e2).
>> Do you have a solution without changing C? If not, could your library take care of this use case? IMO
>> this will reduce the need for more shared_ptr than really needed.
> Doesn't an aliasing shared_ptr work for this?
> I.e. boost::shared_ptr<T>(c, &c->e1)
Wow, I missed this functionality.

Thanks a lot for sharing,

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