On Sat, Mar 10, 2012 at 11:56 PM, pwx
<airyai@gmail.com> wrote:
I tried to create a template function that receives boost::function as
parameter. Say like this:
template <typename T1, typename T2>
void proc(const boost::function<void(const T1&, T2&)> &p) {
// ...
}
void f(const string& s1, string&s2) {
// ...
}
Everything goes ok when I called proc( boost::function<void(const
string&, string&)>(f) ). But when I try this:
proc(boost::bind(f, _1, _2));
The compiler refused with the error:
no matching function for call to
‘proc(boost::_bi::bind_t<boost::_bi::unspecified, F,
boost::_bi::list2<boost::arg<1>, boost::arg<2> > >)’
Anyway to fulfill this design purpose? Thanks.
Explicitly provide the template parameters? E.g.,
proc< std::string, std::string >(boost::bind(f, _1, _2));
There's really no way for the compiler to figure out what T1 and T2 should be without your help. Or maybe your proc should really be declared like
template< class F > void proc(F const & f);
?
Or maybe you can provide the above overload of proc and have its body provide the explicit template parameters to the original overload of proc for you?
Just some ideas.
- Jeff