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Returns the result type of front.
template<typename Seq> struct front { typedef unspecified type; };
Table 1.26. Parameters
|
Parameter |
Requirement |
Description |
|---|---|---|
|
|
A model of Forward Sequence |
Argument sequence |
result_of::front<Seq>::type
Return type: Any type
Semantics: The type returned by dereferencing
an iterator to the first element in Seq.
Equivalent to .
result_of::deref<result_of::begin<Seq>::type>::type
#include <boost/fusion/sequence/intrinsic/front.hpp> #include <boost/fusion/include/front.hpp>
typedefvector<int,char> vec; BOOST_MPL_ASSERT((boost::is_same<result_of::front<vec>::type, int&>));