forked from boostorg/unordered
54 lines
1.3 KiB
C++
54 lines
1.3 KiB
C++
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// Copyright 2006-2009 Daniel James.
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#if !defined(BOOST_UNORDERED_TEST_HELPERS_HEADER)
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#define BOOST_UNORDERED_TEST_HELPERS_HEADER
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namespace test {
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template <class Container> struct get_key_impl
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{
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typedef BOOST_DEDUCED_TYPENAME Container::key_type key_type;
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static key_type const& get_key(key_type const& x) { return x; }
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template <class T>
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static key_type const& get_key(std::pair<key_type, T> const& x, char = 0)
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{
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return x.first;
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}
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template <class T>
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static key_type const& get_key(
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std::pair<key_type const, T> const& x, unsigned char = 0)
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{
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return x.first;
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}
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};
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template <class Container, class T>
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inline BOOST_DEDUCED_TYPENAME Container::key_type const& get_key(T const& x)
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{
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return get_key_impl<Container>::get_key(x);
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}
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// test::next
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//
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// Increments an iterator by 1 or a given value.
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// Like boost::next, but simpler and slower.
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template <typename Iterator> Iterator next(Iterator it) { return ++it; }
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template <typename Iterator, typename IntType>
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Iterator next(Iterator it, IntType x)
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{
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for (; x > 0; --x) {
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++it;
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}
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return it;
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}
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}
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#endif
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