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Diffstat (limited to '3rdParty/Boost/src/boost/variant/detail/hash_variant.hpp')
-rw-r--r-- | 3rdParty/Boost/src/boost/variant/detail/hash_variant.hpp | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/variant/detail/hash_variant.hpp b/3rdParty/Boost/src/boost/variant/detail/hash_variant.hpp new file mode 100644 index 0000000..3da669e --- /dev/null +++ b/3rdParty/Boost/src/boost/variant/detail/hash_variant.hpp @@ -0,0 +1,48 @@ +//----------------------------------------------------------------------------- +// boost variant/detail/hash_variant.hpp header file +// See http://www.boost.org for updates, documentation, and revision history. +//----------------------------------------------------------------------------- +// +// Copyright (c) 2011 +// Antony Polukhin +// +// 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) + + +#ifndef BOOST_HASH_VARIANT_FUNCTION_HPP +#define BOOST_HASH_VARIANT_FUNCTION_HPP + +#if defined(_MSC_VER) && (_MSC_VER >= 1020) +# pragma once +#endif + +#include <boost/variant/variant_fwd.hpp> +#include <boost/variant/static_visitor.hpp> +#include <boost/variant/apply_visitor.hpp> +#include <boost/functional/hash_fwd.hpp> + +namespace boost { + + namespace detail { namespace variant { + struct variant_hasher: public boost::static_visitor<std::size_t> { + template <class T> + std::size_t operator()(T const& val) const { + using namespace boost; + hash<T> hasher; + return hasher(val); + } + }; + }} + + template < BOOST_VARIANT_ENUM_PARAMS(typename T) > + std::size_t hash_value(variant< BOOST_VARIANT_ENUM_PARAMS(T) > const& val) { + std::size_t seed = boost::apply_visitor(detail::variant::variant_hasher(), val); + hash_combine(seed, val.which()); + return seed; + } +} + +#endif + |