Re: [Boost-users] [fusion][mpl] Get type from fusion sequenceusingmpl::at_c

From: Chris Weed (chrisweed_at_[hidden])
Date: 2007-01-20 18:01:02

It appears another option is as follows:
result_of::value_of<result_of::begin<VectorType>::type>::type

or for an arbitrary index N

enum { N=2 };
result_of::value_of<result_of::advance_c<result_of::begin<VectorType>::type,N>::type>::type

Chris

On 1/20/07, Sohail Somani <s.somani_at_[hidden]> wrote:
>
>
>
> All the at functions would return you a reference, not a copy anyway. So
> they are doing the right thing. Stripping the reference is the right thing
> to do.
>
>  -----Original Message-----
>  From: boost-users-bounces_at_[hidden] on behalf of
> Chris Weed
>  Sent: Sat 1/20/2007 9:31 AM
>  To: boost-users_at_[hidden]
>  Subject: Re: [Boost-users] [fusion][mpl] Get type from fusion
> sequenceusingmpl::at_c
>
>  I tried this, but it seems to be the result of the at_c function which
>  is a reference. I would like to get the type of the element. I suppose
>  I could use a meta-function to strip off the &, but it seems like the
>  mpl version of at_c should do what I want.
>  Chris
>
>  On 1/18/07, Sohail Somani <s.somani_at_[hidden]> wrote:
>  >
>  >
>  >
>  > -----Original Message-----
>  >  From: boost-users-bounces_at_[hidden] on behalf of
>  > Chris Weed
>  >
>  >  Hi,
>  >  I am trying to get the type of the first element in a fusion vector
>  >  using mpl::at_c. This seems simple enough.
>  >
>  >  ----
>  >
>  >  I'm a noob to fusion but do you want fusion::result_of::at_c instead?
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