Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Returns the type that will be returned by dereferencing the data property referenced by an associative iterator.
template< typename I > struct deref_data { typedef unspecified type; };
Table 1.21. Parameters
|
Parameter |
Requirement |
Description |
|---|---|---|
|
|
Model of Associative Iterator |
Operation's argument |
result_of::deref_data<I>::type
Return type: Any type
Semantics: Returns the result of dereferencing
the data property referenced by an associative iterator of type I.
#include <boost/fusion/iterator/deref_data.hpp> #include <boost/fusion/include/deref_data.hpp>
typedef map<pair<float, int> > map_type; typedef boost::fusion::result_of::begin<map_type>::type i_type; typedef boost::fusion::result_of::deref_data<i_type>::type r_type; BOOST_STATIC_ASSERT((boost::is_same<r_type, int&>::value));