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// Copyright 2006-2009 Daniel James.
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#if !defined(BOOST_UNORDERED_TEST_HELPERS_HEADER)
#define BOOST_UNORDERED_TEST_HELPERS_HEADER
#include <iterator>
namespace test {
template <class Container> struct get_key_impl
{
typedef typename Container::key_type key_type;
static key_type const& get_key(key_type const& x) { return x; }
template <class T>
static key_type const& get_key(std::pair<key_type, T> const& x, char = 0)
{
return x.first;
}
template <class T>
static key_type const& get_key(
std::pair<key_type const, T> const& x, unsigned char = 0)
{
return x.first;
}
};
template <class Container, class T>
inline typename Container::key_type const& get_key(T const& x)
{
return get_key_impl<Container>::get_key(x);
}
// test::next
//
// Increments an iterator by 1 or a given value.
// Like boost::next, but simpler.
// Mainly because boost::next uses an MPL file
// which causes warnings.
template <typename Iterator> Iterator next(Iterator it) { return ++it; }
template <typename Iterator, typename IntType>
Iterator next(Iterator it, IntType x)
{
std::advance(it,
static_cast<typename std::iterator_traits<Iterator>::difference_type>(x));
return it;
}
}
#endif
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