begin

Returns the result type of begin.

template<typename Seq>
struct begin
{
    typedef unspecified type;
};

Table 1.19. Parameters

Parameter	Requirement	Description
`Seq`	A model of Forward Sequence	Argument sequence

result_of::begin<Seq>::type

Return type: An iterator modelling the same traversal concept as Seq.

Semantics: Returns the type of an iterator to the first element of Seq.

/sequence/intrinsic/begin.hpp>

typedef vector<int> vec;
typedef result_of::begin<vec>::type it;
BOOST_MPL_ASSERT((boost::is_same<result_of::deref<it>::type, int&>))