Your search +path:boost_asio +path:. +path:reference +path:. +path:posix__basic_stream_descriptor +path:. +path:cancel +path:. +path:overload2 did not match any files.
Suggestions:

• Make sure all terms are spelled correctly.
• Try different keywords.
• Try more general keywords.
• Use 'wil*' cards if you are looking for partial match.