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[SVN r43358]
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John Maddock
2008-02-21 16:51:41 +00:00
parent 3b702727b9
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15
doc/static_assert.qbk
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@ -15,6 +15,10 @@
[last-revision $Date$]
]
This manual is also available in
[@http:svn.boost.org/svn/boost/sandbox/pdf/static_assert/release/static_assert.pdf
printer friendly PDF format].
[section:intro Overview and Tutorial]
The header `<boost/static_assert.hpp>` supplies a single macro `BOOST_STATIC_ASSERT(x)`,
@ -94,12 +98,17 @@ the user that the template is being misused.
#include <boost/type_traits.hpp>
template <class RandomAccessIterator >
RandomAccessIterator foo(RandomAccessIterator from, RandomAccessIterator to)
RandomAccessIterator foo(RandomAccessIterator from,
RandomAccessIterator to)
{
// this template can only be used with
// random access iterators...
typedef typename std::iterator_traits< RandomAccessIterator >::iterator_category cat;
BOOST_STATIC_ASSERT((boost::is_convertible<cat, const std::random_access_iterator_tag&>::value));
typedef typename std::iterator_traits<
RandomAccessIterator >::iterator_category cat;
BOOST_STATIC_ASSERT(
(boost::is_convertible<
cat,
const std::random_access_iterator_tag&>::value));
//
// detail goes here...
return from;