Re: [Boost-users] [parameter] Composing ArgumentPacks

BOOST_PARAMETER_KEYWORD(tag, x) BOOST_PARAMETER_KEYWORD(tag, y)

template<class ArgumentPack> void f(ArgumentPack const & args){ double x_val = args[x]; double y_val = args[y]; }

typedef boost::parameter::parameters< parameter::requiredtag::x > par_x_t; typedef boost::parameter::parameters< parameter::requiredtag::y > par_y_t;

double x_val = 9.0; double y_val = 0.1; spec_x_t spec_x; spec_y_t spec_y; f( ( spec_x(x_val),spec_y(y_val)) // (5) ); //no match operator[<unnamed>::x]

Hi All. Am I using Parameter incorrectly in this example?