forked from boostorg/static_assert
41 lines
1.1 KiB
C++
41 lines
1.1 KiB
C++
// (C) Copyright John Maddock 2000.
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// Permission to copy, use, modify, sell and
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// distribute this software is granted provided this copyright notice appears
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// in all copies. This software is provided "as is" without express or implied
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// warranty, and with no claim as to its suitability for any purpose.
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// See http://www.boost.org for most recent version including documentation.
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#include <iterator>
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#include <list>
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#include <deque>
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#include <boost/static_assert.hpp>
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#include <boost/type_traits.hpp>
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template <class RandomAccessIterator >
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RandomAccessIterator foo(RandomAccessIterator from, RandomAccessIterator to)
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{
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// this template can only be used with
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// random access iterators...
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typedef typename std::iterator_traits< RandomAccessIterator >::iterator_category cat;
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BOOST_STATIC_ASSERT((boost::is_convertible<cat, const std::random_access_iterator_tag&>::value));
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//
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// detail goes here...
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return from;
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}
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int main()
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{
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std::deque<int> d;
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std::list<int> l;
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foo(d.begin(), d.end()); // OK
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//foo(l.begin(), l.end()); // error
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return 0;
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}
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