.working ======= <<<<<<< .working >>>>>>> .merge-right.r57125 ======= >>>>>>> .merge-right.r58299
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Returns the actual type at a given index from the Sequence.
template< typename Seq, int M> struct value_at_c { typedef unspecified type; };
Table 1.28. Parameters
Parameter |
Requirement |
Description |
|---|---|---|
Seq |
A model of Forward Sequence |
Argument sequence |
M |
Positive integer index |
Index of element |
result_of::value_at_c<Seq, M>::type
Return type: Any type
Semantics: Returns the actual type at the Mth element of Seq.
#include <boost/fusion/sequence/intrinsic/value_at.hpp> #include <boost/fusion/include/value_at.hpp>
typedef vector<int,float,char> vec; BOOST_MPL_ASSERT((boost::is_same<result_of::value_at_c<vec, 1>::type, float>));