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A customisation point that queries the value of a property.

constexpr unspecified query = unspecified;

The name query denotes a customization point object. The expression boost::asio::query(E, P) for some subexpressions E and P (with types T = decay_t<decltype(E)> and Prop = decay_t<decltype(P)>) is expression-equivalent to:


Header: boost/asio/query.hpp

Convenience header: boost/asio.hpp