forked from boostorg/unordered
49 lines
973 B
C++
49 lines
973 B
C++
// Copyright 2022 Peter Dimov
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// Distributed under the Boost Software License, Version 1.0.
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// https://www.boost.org/LICENSE_1_0.txt
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// an imitation of a third-party header specializing hash_is_avalanching
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// (boost/container_hash/hash.hpp is an example doing that)
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#include <boost/type_traits/integral_constant.hpp>
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struct X3
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{
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};
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namespace boost
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{
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namespace unordered
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{
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template<class T> struct hash_is_avalanching;
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template<> struct hash_is_avalanching< ::X3 >: boost::true_type {};
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} // namespace unordered
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} // namespace boost
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//
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#include <boost/unordered/hash_traits.hpp>
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#include <boost/core/lightweight_test_trait.hpp>
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struct X1
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{
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};
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struct X2
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{
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typedef void is_avalanching;
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};
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int main()
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{
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using boost::unordered::hash_is_avalanching;
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BOOST_TEST_TRAIT_FALSE((hash_is_avalanching<X1>));
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BOOST_TEST_TRAIT_TRUE((hash_is_avalanching<X2>));
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BOOST_TEST_TRAIT_TRUE((hash_is_avalanching<X3>));
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return boost::report_errors();
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}
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