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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
| Name | Description | 
|---|---|
| A bitmask type (C++ Std [lib.bitmask.types]). | 
| Name | Description | 
|---|---|
| Protected destructor to prevent deletion through this type. | 
| Name | Description | 
|---|---|
| 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. | |
| If used with v4_mapped, return all matching IPv6 and IPv4 addresses. | |
| Determine the canonical name of the host specified in the query. | |
| Host name should be treated as a numeric string defining an IPv4 or IPv6 address and no name resolution should be attempted. | |
| Service name should be treated as a numeric string defining a port number and no name resolution should be attempted. | |
| Indicate that returned endpoint is intended for use as a locally bound socket endpoint. | |
| If the query protocol family is specified as IPv6, return IPv4-mapped IPv6 addresses on finding no IPv6 addresses. | 
        Header: boost/asio/ip/resolver_base.hpp
      
        Convenience header: boost/asio.hpp