[boost] Re: Small tuple extension

From: Larry Evans (cppljevans_at_[hidden])
Date: 2005-04-27 18:09:01

On 04/27/2005 05:33 PM, Giovanni P. Deretta wrote:
[snip]
> to use some kind of tag instead of indexes).  In code that i wrote there 
> were  a set of functions that had similar effects and had multiple 
> return values (as tuples).  The return values weren't the same, but all 
> of them had a common types.  Some generic code had to work with this 
> functions and needed to extract this common types from the tuples.  A 
> typed get was exactly what i needed.  Fusion 'find' would probably have 
> done the job as well, but i did not know it untill now.

I amended the code in vault:

http://boost-sandbox.sourceforge.net/vault/index.php?&direction=0&order=&directory=cppljevans

by adding templated member function:

    template<class FieldType>
      FieldType&
    find_type(void)
    ;

to template tuple_indexed.  Would this satisfy your needs?