On Sun, 16 Mar 2003 11:47:57 -0600, "David B. Held" <[EMAIL PROTECTED]> wrote:
>"Gennaro Prota" <[EMAIL PROTECTED]> wrote in message >news:[EMAIL PROTECTED] >> [...] >> I don't know if it's useful or not but it's certainly usable. The fact >> that deduction fails in your case doesn't mean it fails always; and >> for named templates there's still the possibility to explicit specify >> template arguments. In your case, you could do: >> [...] >> foo f(x, (X*)0 ); >> [...] > >The problem is that it doesn't scale very well. I would like to >forward c'tors that take around 8-10 arguments. What monster are you creating, man? :-) Ok, assuming that you need so much parameters, and that there's a speed gain with using call_traits, it's enough to add one more of them to deduce all the template arguments. Example: class X1 {}; class X2 {}; class X3 {}; class foo { public: template <typename U1, typename U2, typename U3> foo(typename boost::call_traits<U1>::param_type v1, typename boost::call_traits<U2>::param_type v2, typename boost::call_traits<U3>::param_type v3, void(*)(U1, U2, U3) ) { } }; int main() { X1 x1; X2 x2; X3 x3; foo f(x1, x2, x3, (void(*)(X1, X2, X3))0 ); } As ugly as sin, but shouldn't make your Frankenstein appear much worse than it already is :-) PS: I'm just joking! Genny. _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
