Douglas Gregor <doug.gregor@gmail.com> writes:
On Jun 19, 2005, at 10:32 AM, Brian Braatz wrote:
My question is, given:
boost::function< int (char, long) > func(&f);
how is it possible to pass the (char,long)? (I tried to receive this in a template as a single template param, or as three , but neither worked)
int (char, long) is a function type, i.e., the type that the pointer type int (*)(char, long) points to. You can pull apart a point type using partial specialization:
template<typename> struct Honk;
template<typename R, typename T1, typename T2> struct Honk<R(T1, T2)> { };
Honk<int(char, long)> h; // R = int, T1 = char, T2 = long
I have been studying the headers, but the indirection used (FTSE :)
) is making it hard for me to figure this one out.
I am supposed to be giving a talk that covers some of the implementation techniques used in Boost.Function at the C++ Connections conference in Vegas,... if you can wait that long :) -- Dave Abrahams Boost Consulting www.boost-consulting.com