[/
 / Copyright (c) 2003-2025 Christopher M. Kohlhoff (chris at kohlhoff dot com)
 /
 / 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)
 /]

[section:ResolveHandler Resolve handler requirements]

A resolve handler must meet the requirements for a [link boost_asio.reference.Handler
handler]. A value `h` of a resolve handler class should work correctly in the
expression `h(ec, r)`, where `ec` is an lvalue of type `const error_code` and
`r` is an lvalue of type `const ip::basic_resolver_results<InternetProtocol>`.
`InternetProtocol` is the template parameter of the [link
boost_asio.reference.ip__basic_resolver `ip::basic_resolver<>`] which is used to
initiate the asynchronous operation.

[endsect]
