Re: [boost] [mpl] as_sequence< X< Y > > instantiates typedefs inX<Y >

From: David Abrahams (dave_at_[hidden])
Date: 2005-08-03 12:33:41

Andreas Huber <ahd6974-spamgroupstrap_at_[hidden]> writes:

> David Abrahams <dave <at> boost-consulting.com> writes:
>> > - size
>> > - empty
>> > - at
>> 
>> ?? list<> doesn't support that!
>
> You mean at? I've had another look an I am positive that it must support it 
> somehow. I'm not including any other containers than mpl::list! At least for 
> 1.32. I haven't tried with 1.33 yet.

Well, if list<> supports at<> it's an extension.  It certainly isn't
O(1).  mpl::list is not a random access sequence.  Ah, I see that at<>
is using advance<>, which is why it "works."  I wonder if we actually
ought to be causing a compilation error in this case.

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com