# Class type Uq_resolver.resolver

    class type resolver = object .. end

    method ipv6 : bool

Whether `host_by_name` may return IPv6 addresses

    method host_by_name : string -> Unixqueue.event_system -> Unix.host_entry engine

Look up the passed host name up. The implementation can be synchronous or asynchronous. In the first case, an engine is returned that is already in one of the states ``Done he` or ``Error e` where `he` is the host entry, or `e` is an exception like `Host_not_found`. In this case the passed event system is ignored. If the implementation is asynchronous, the caller must run the event system until the state of the engine transitions to ``Done he` or ``Error e`.