-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Friday 22 May 2009, Doug Gregor wrote:
I think it would be really, really cool to have a version of Signals2 that uses variadic templates rather than preprocessor metaprogramming. For me, personally, I'd rather see it as an alternative implementation of exactly the same interface (switched based on BOOST_NO_VARIADIC_TEMPLATES) rather than a separate library. But, that's up to Frank :)
That seems like the way to go. I was thinking it might be good to expose a separate variadic_signal which was completely free of preprocessor metaprogramming, instead of keeping it entirely as an implementation detail. But it seems to me now the existing signal interface might just need one change to be implementable without preprocessor metaprogramming. The arg1_type, arg2_type, etc typedefs need to be replaced with a template, so for example typedef signal<void (int)> sig_type; sig_type::arg1_type would look something like sig_type::arg<0>::type -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEARECAAYFAkoXB5oACgkQ5vihyNWuA4VgdwCgjSgN47i0nI1wLR1PfTwB7YgL sakAn0AFMHpB/sl29O8uv4sjwpKm8ujo =9Sj2 -----END PGP SIGNATURE-----