unpack_args

template<
      typename F
    >
struct unpack_args
{
    // unspecified
    // ...
};

A higher-order primitive transforming an n-ary Lambda Expression F into an unary Metafunction Class g accepting a single sequence of n arguments.

#include <boost/mpl/unpack_args.hpp>

Parameter	Requirement	Description
`F`	Lambda Expression	A lambda expression to adopt.

For an arbitrary Lambda Expression f, and arbitrary types a1,... an:

typedef unpack_args<f> g;

Return type:

Return type:	Metafunction Class.
Semantics:	`g` is a unary Metafunction Class such that apply_wrapn< g, vector<a1,...an> >::type is identical to apply<F,a1,...an>::type

Semantics:

g is a unary Metafunction Class such that

apply_wrapn< g, vector<a1,...an> >::type

is identical to

apply<F,a1,...an>::type

BOOST_MPL_ASSERT(( apply<
      unpack_args< is_same<_1,_2> >
    , vector<int,int>
    > ));