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Oh but I'm not arguing against being able to get the type_info of the
stored type - I very much like to see that.

- Sylvester
From: Paul Smith
Sent: 17-1-2013 18:15
To: std-proposals@isocpp.org
Subject: Re: [std-proposals] Any library proposal (Revision 2) draft
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On Thu, Jan 17, 2013 at 6:23 PM, Sylvester Hesp <s.hesp@oisyn.nl> wrote:
> On Thursday, January 17, 2013 3:23:27 PM UTC+1, Tony V E wrote:
>>
>> I don't think it is always that you put a derived type in, but in
>> general, you may not know the type put in.
>
>
> You *always* know the type you put in.

You always know the stored type... at the point of store.
There could be all sorts of reasons to want to query the type of the
value instead of just testing for a specific type. Dynamic-dispatching
is probably the most prominent example, even though it's arguable that
'any' isn't necessarily the best tool for the job.

At any rate, I don't see a simple way to implement 'a.is_type<T>()'
other than 'a.type() == typeid(T)' (which really isn't *that* much
worse).

--
Paul Smith

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I'm sorry my phone screwed up, please disregard this thread.

- Sylvester

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I'm sorry my phone screwed up, please disregard this thread.<div><br></div><div>- Sylvester</div>

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