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        The ip::resolver_base
        class is used as a base for the ip::basic_resolver
        class templates to provide a common place to define the flag constants.
      
class resolver_base
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                 Name  | 
                 Description  | 
|---|---|
| 
                 A bitmask type (C++ Std [lib.bitmask.types]).  | 
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                 Name  | 
                 Description  | 
|---|---|
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                 ~resolver_base [destructor]  | 
                 Protected destructor to prevent deletion through this type.  | 
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                 Name  | 
                 Description  | 
|---|---|
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                 address_configured [static]  | 
                 Only return IPv4 addresses if a non-loopback IPv4 address is configured for the system. Only return IPv6 addresses if a non-loopback IPv6 address is configured for the system.  | 
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                 all_matching [static]  | 
                 If used with v4_mapped, return all matching IPv6 and IPv4 addresses.  | 
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                 canonical_name [static]  | 
                 Determine the canonical name of the host specified in the query.  | 
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                 numeric_host [static]  | 
                 Host name should be treated as a numeric string defining an IPv4 or IPv6 address and no name resolution should be attempted.  | 
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                 numeric_service [static]  | 
                 Service name should be treated as a numeric string defining a port number and no name resolution should be attempted.  | 
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                 passive [static]  | 
                 Indicate that returned endpoint is intended for use as a locally bound socket endpoint.  | 
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                 v4_mapped [static]  | 
                 If the query protocol family is specified as IPv6, return IPv4-mapped IPv6 addresses on finding no IPv6 addresses.  | 
        Header: asio/ip/resolver_base.hpp
      
        Convenience header: asio.hpp