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Moves an iterator by a specified distance.
template< typename I, int N > struct advance_c { typedef unspecified type; };
Table 1.19. Parameters
|
Parameter |
Requirement |
Description |
|---|---|---|
|
|
Model of Forward Iterator |
Iterator to move relative to |
|
|
Integer constant |
Number of positions to move |
result_of::advance_c<I, N>::type
Return type: A model of the same iterator
concept as I.
Semantics: Returns an iterator a distance
N from I.
If I is a Bidirectional
Iterator then N
may be negative. Equivalent to .
result_of::advance<I, boost::mpl::int_<N> >::type
#include <boost/fusion/iterator/advance.hpp> #include <boost/fusion/include/advance.hpp>
typedefvector<int,double,char> vec; typedefresult_of::begin<vec>::type first; typedefresult_of::next<first>::type second; typedefresult_of::next<second>::type third; BOOST_MPL_ASSERT((result_of::equal_to<result_of::advance_c<first, 2>::type, third>));