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Help GCC 4.8 distinguish between Functions and Executors #1723

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Help GCC 4.8 distinguish between Functions and Executors #1723

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7 changes: 6 additions & 1 deletion include/asio/detail/work_dispatcher.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -40,8 +40,13 @@ struct empty_work_function
}
};

template <typename Function>
template <typename Function, typename = void>
struct work_result
{
};

template <typename Function>
struct work_result<Function, void_t<result_of_t<decay_t<Function>()>>>
{
typedef decay_t<result_of_t<decay_t<Function>()>> type;
};
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