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Fix C++20 compatibility for filtered_hash #608

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Fix C++20 compatibility for filtered_hash #608

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16 changes: 4 additions & 12 deletions Rx/v2/src/rxcpp/rx-util.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -996,22 +996,16 @@ struct filtered_hash<T, typename std::enable_if<rxu::is_string<T>::value>::type>
};
template <class T>
struct filtered_hash<T, typename std::enable_if<std::is_convertible<T, std::chrono::duration<typename T::rep, typename T::period>>::value>::type> {
using argument_type = T;
using result_type = std::size_t;

result_type operator()(argument_type const & dur) const
std::size_t operator()(T const & dur) const
{
return std::hash<typename argument_type::rep>{}(dur.count());
return std::hash<typename T::rep>{}(dur.count());
}
};
template <class T>
struct filtered_hash<T, typename std::enable_if<std::is_convertible<T, std::chrono::time_point<typename T::clock, typename T::duration>>::value>::type> {
using argument_type = T;
using result_type = std::size_t;

result_type operator()(argument_type const & tp) const
std::size_t operator()(T const & tp) const
{
return std::hash<typename argument_type::rep>{}(tp.time_since_epoch().count());
return std::hash<typename T::rep>{}(tp.time_since_epoch().count());
}
};

Expand All @@ -1022,8 +1016,6 @@ struct is_hashable
template<typename T>
struct is_hashable<T,
typename rxu::types_checked_from<
typename filtered_hash<T>::result_type,
typename filtered_hash<T>::argument_type,
typename rxu::callable_result<filtered_hash<T>, T>::type>::type>
: std::true_type {};

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