On Nov 22, 2004, at 7:05 PM, Brock Peabody wrote:
I replaced my home grown result_type<> with boost::result_of<> today only to find that I couldn't get it to work. When I try to use result_of with VC 7.1:
struct test_struct {
typedef int result_type; };
boost::result_of<test_struct>::type i = 5;
I get:
test.cpp(10) : error C2027: use of undefined type 'boost::result_of<F>'
I get the same results if I use function types of pointer to function types:
boost::result_of<int (*)()>::type i = 5; boost::result_of<int ()()>::type i = 5;
Am I missing something?
Yes :) With result_of, you pass the function object type _and_ the types of the arguments, e.g., boost::result_of<test_struct(int, float)>::type That's how result_of is able to deal with polymorphic function objects. Doug