Re: [Boost-users] Why use 'functional composition' with boost::bind

On 08/04/2010 03:02 AM, Mathias Gaunard wrote:

...

2) Then, it is suggested furthermore that if foo() is a (simple?) nested function, say T=double and,

double foo(double x) { return 2*x; }

then one should do 'functional composition', i.e. create the functor for the previous point 1) by

boost::bind(std::multiplies<double>(),2,_1)

Replace all that by just 2*_1

Does it work? I was not able to: error: no match for ‘operator*’ in ‘2 * boost::lambda::<unnamed>::_1’ Regards Gaetano Mendola