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POFiltering specific iterators for template functions
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copied!<p>I am developing a set of functions that takes advantage of containers that have packed and sequential memory storage (for memory copies). They have function signatures in the style of most STD functions, input/output iterators point to elements and denote ranges. For instance, a function could look like this:</p> <pre><code>template< typename InputIterator, typename OutputIterator > OutputIterator fooBar( InputIterator& first, InputIterator& last, OutputIterator& result ); </code></pre> <p>I wish to verify that the iterators passed are legal, that is packed and sequential. For the STD containers, this is limited to std::vector and std::array. Unfortunately, I can't rely on the iterator 'category' trait, because the random access trait does not imply seqential storage. An example of this is microsofts concurrent_vector class, documented here <a href="http://msdn.microsoft.com/en-us/library/dd504906%28v=vs.110%29.aspx" rel="nofollow">parallel containers</a></p> <p>In addition, I can't accept all iterators from the vector and array classes either, for instance i need to reject reverse iterators, and std::vector<code><bool</code>> iterators are unsuitable because of the proxy class that it uses. </p> <p>I've attempted to create my own traits class to distinguish and filter the iterators with the constraints that i describe above, but i'm running into template syntax problems. I am looking for feedback from others on how they would approach this problem.</p> <p>Thanks</p>

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