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From: David Abrahams (dave_at_[hidden])
Date: 2006-05-18 16:21:22

I find myself creating this class member:

        , compressed_pair<
            , compressed_pair<
                , SetUnstored
> members;

I imagine this sort of usage is pretty common. The problem is that
it's hard to initialize this member efficiently: you have to build and
copy too many compressed_pairs. I propose to extend compressed_pair
with overloaded ctors, as follows:

        first_param_type f
      , typename second_type::first_param_type sf
      , typename second_type::second_param_type ss);

        first_param_type f
      , typename second_type::first_param_type sf
      , typename second_type::second_type::first_param_type ssf
      , typename second_type::second_type::second_param_type sss );



If SFINAE doesn't take out these declarations when the second type is
not a (compressed_)pair, we can always template them.


Dave Abrahams
Boost Consulting

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