16 Mar
2005
16 Mar
'05
5:06 a.m.
Ian McCulloch wrote:
Yes, if you want to forward to a function but you don't know if it takes arguments by value or const reference.
It doesn't matter. When you forward, you pass to result_of the exact types of the arguments you are supplying in the function (object) call, with a reference when the argument is an lvalue. int x; long y; int const z; int g(); int & h(); f(x, y); // result_of<F(int&, long&)> f(1, x); // result_of<F(int, int&)> f(z, 4); // result_of<F(int const&, int)> f( g(), h() ); // result_of<F(int, int&)> What is 'f' and how it takes its arguments in the cases above does not affect how result_of is used.