| Front Page / Sequences / Intrinsic Metafunctions / back | 
Returns the last element in the sequence.
#include <boost/mpl/back.hpp>
| Parameter | Requirement | Description | 
|---|---|---|
| Sequence | Bidirectional Sequence | A sequence to be examined. | 
For any Bidirectional Sequence s:
typedef back<s>::type t;
| Return type: | A type. | 
|---|---|
| Precondition: | empty<s>::value == false. | 
| Semantics: | Equivalent to typedef deref< prior< end<s>::type >::type >::type t; | 
Amortized constant time.
typedef range_c<int,0,1> range1; typedef range_c<int,0,10> range2; typedef range_c<int,-10,0> range3; BOOST_MPL_ASSERT_RELATION( back<range1>::value, ==, 0 ); BOOST_MPL_ASSERT_RELATION( back<range2>::value, ==, 9 ); BOOST_MPL_ASSERT_RELATION( back<range3>::value, ==, -1 );