Re: [Boost-users] [fusion] .at<N>() template member in containers?

On Wed, Oct 6, 2010 at 1:21 PM, Frank Mori Hess wrote:

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1

On Wednesday 06 October 2010, alfC wrote:

...

Hi,

Excuse my simple minded questions. Sometimes by asking this question (often with negative answer) I understand more on the design of the Boost libraries.

Besides possible redundancy, why is that the fusion containers, for example fusion::vector, doesn't have a template member function to extract elements?

fusion::vector stuff(1.2, 3, "hola"); stuff.at<2>(); //returns "hola", just like at_c<2>(stuff);

Wouldn't that require template specializations of the "at()" member template for its differing return types? IIRC, C++ doesn't let you specialize template members of template classes.

It does not seem to be a technical problem, tuples have member functions tuples t; t.get<2>(); // a string

-----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux)

iEYEARECAAYFAkys2mAACgkQ5vihyNWuA4Wd+wCff6IeuTbsJj0GVqPrqaGanKEG 9ogAoM/nwd7GCdR4IzYR2i5lBLhfyx1z =ojtF -----END PGP SIGNATURE----- _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users

-- Sie haben diese Nachricht erhalten, da Sie der Google Groups-Gruppe Boost Users beigetreten sind. Wenn Sie Nachrichten in dieser Gruppe posten möchten, senden Sie eine E-Mail an boostusers@googlegroups.com. Wenn Sie aus dieser Gruppe austreten möchten, senden Sie eine E-Mail an boostusers+unsubscribe@googlegroups.com . Besuchen Sie die Gruppe unter http://groups.google.com/group/boostusers?hl=de, um weitere Optionen zu erhalten.