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— Herb Sutter and Andrei
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Coding Standards
Front Page / Iterators / Iterator Metafunctions / deref |
Dereferences an iterator.
#include <boost/mpl/deref.hpp>
Parameter | Requirement | Description |
---|---|---|
Iterator | Forward Iterator | The iterator to dereference. |
For any Forward Iterators iter:
typedef deref<iter>::type t;
Return type: | A type. |
---|---|
Precondition: | iter is dereferenceable. |
Semantics: | t is identical to the element referenced by iter. If iter is a user-defined iterator, the library-provided default implementation is equivalent to typedef iter::type t; |
Amortized constant time.
typedef vector<char,short,int,long> types; typedef begin<types>::type iter; BOOST_MPL_ASSERT(( is_same< deref<iter>::type, char > ));