2013-02-04 01:24:23 +00:00
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#ifndef SPROUT_UTILITY_VALUE_HOLDER_HASH_HPP
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#define SPROUT_UTILITY_VALUE_HOLDER_HASH_HPP
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#include <cstddef>
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#include <sprout/config.hpp>
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#include <sprout/utility/value_holder/value_holder.hpp>
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2013-02-04 09:42:39 +00:00
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#include <sprout/functional/hash.hpp>
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2013-02-04 01:24:23 +00:00
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namespace sprout {
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//
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// hash_value
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//
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template<typename T>
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inline SPROUT_CONSTEXPR std::size_t
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hash_value(sprout::value_holder<T> const& v) {
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return sprout::to_hash(*v)
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;
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}
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template<typename T>
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inline SPROUT_CONSTEXPR std::size_t
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hash_value(sprout::value_holder<T&> const& v) {
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return v.is_initialized() ? sprout::to_hash(*v)
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: 0
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;
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_UTILITY_VALUE_HOLDER_HASH_HPP
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