}
	if len(addrs) > 1 {
		return nil, errors.New("mail: group with multiple addresses")
	}
	return addrs[0], nil
}

// parseAddress parses a single RFC 5322 address at the start of p.
func (p *addrParser) parseAddress(handleGroup bool) ([]*Address, error) {
	debug.Printf("parseAddress: %q", p.s)
	p.skipSpace()
	if p.empty() {
		return nil, errors.New("mail: no address")
	}

	// address = mailbox / group

		}

		// Check round-trip.
		if test.addr.Address != "" && test.addr.Address != "@" {
			a, err := ParseAddress(test.exp)
			if err != nil {
				t.Errorf("ParseAddress(%#q): %v", test.exp, err)
				continue
			}
			if a.Name != test.addr.Name || a.Address != test.addr.Address {
				t.Errorf("ParseAddress(%#q) = %#v, want %#v", test.exp, a, test.addr)
			}
		}
	}
}

  //
  // - bsonobjectid: a bson object ID, i.e. a 24 characters hex string
  // - uri: an URI as parsed by Golang net/url.ParseRequestURI
  // - email: an email address as parsed by Golang net/mail.ParseAddress
  // - hostname: a valid representation for an Internet host name, as defined by RFC 1034, section 3.1 [RFC1034].
  // - ipv4: an IPv4 IP as parsed by Golang net.ParseIP
  // - ipv6: an IPv6 IP as parsed by Golang net.ParseIP

  //
  // - bsonobjectid: a bson object ID, i.e. a 24 characters hex string
  // - uri: an URI as parsed by Golang net/url.ParseRequestURI
  // - email: an email address as parsed by Golang net/mail.ParseAddress
  // - hostname: a valid representation for an Internet host name, as defined by RFC 1034, section 3.1 [RFC1034].
  // - ipv4: an IPv4 IP as parsed by Golang net.ParseIP
  // - ipv6: an IPv6 IP as parsed by Golang net.ParseIP

Unknown formats are ignored. The following formats are validated:\n\n- bsonobjectid: a bson object ID, i.e. a 24 characters hex string - uri: an URI as parsed by Golang net/url.ParseRequestURI - email: an email address as parsed by Golang net/mail.ParseAddress - hostname: a valid representation for an Internet host name, as defined by RFC 1034, section 3.1 [RFC1034]. - ipv4: an IPv4 IP as parsed by Golang net.ParseIP - ipv6: an IPv6 IP as parsed by Golang net.ParseIP - cidr: a CIDR as parsed by Golang...

Unknown formats are ignored. The following formats are validated:\n\n- bsonobjectid: a bson object ID, i.e. a 24 characters hex string - uri: an URI as parsed by Golang net/url.ParseRequestURI - email: an email address as parsed by Golang net/mail.ParseAddress - hostname: a valid representation for an Internet host name, as defined by RFC 1034, section 3.1 [RFC1034]. - ipv4: an IPv4 IP as parsed by Golang net.ParseIP - ipv6: an IPv6 IP as parsed by Golang net.ParseIP - cidr: a CIDR as parsed by Golang...

		{"AddressParser.WordDecoder", Field, 5},
		{"ErrHeaderNotPresent", Var, 0},
		{"Header", Type, 0},
		{"Message", Type, 0},
		{"Message.Body", Field, 0},
		{"Message.Header", Field, 0},
		{"ParseAddress", Func, 1},
		{"ParseAddressList", Func, 1},
		{"ParseDate", Func, 8},
		{"ReadMessage", Func, 0},
	},
	"net/netip": {
		{"(*Addr).UnmarshalBinary", Method, 18},

Unknown formats are ignored. The following formats are validated:\n\n- bsonobjectid: a bson object ID, i.e. a 24 characters hex string - uri: an URI as parsed by Golang net/url.ParseRequestURI - email: an email address as parsed by Golang net/mail.ParseAddress - hostname: a valid representation for an Internet host name, as defined by RFC 1034, section 3.1 [RFC1034]. - ipv4: an IPv4 IP as parsed by Golang net.ParseIP - ipv6: an IPv6 IP as parsed by Golang net.ParseIP - cidr: a CIDR as parsed by Golang...

Unknown formats are ignored. The following formats are validated:\n\n- bsonobjectid: a bson object ID, i.e. a 24 characters hex string - uri: an URI as parsed by Golang net/url.ParseRequestURI - email: an email address as parsed by Golang net/mail.ParseAddress - hostname: a valid representation for an Internet host name, as defined by RFC 1034, section 3.1 [RFC1034]. - ipv4: an IPv4 IP as parsed by Golang net.ParseIP - ipv6: an IPv6 IP as parsed by Golang net.ParseIP - cidr: a CIDR as parsed by Golang...

Unknown formats are ignored. The following formats are validated:\n\n- bsonobjectid: a bson object ID, i.e. a 24 characters hex string - uri: an URI as parsed by Golang net/url.ParseRequestURI - email: an email address as parsed by Golang net/mail.ParseAddress - hostname: a valid representation for an Internet host name, as defined by RFC 1034, section 3.1 [RFC1034]. - ipv4: an IPv4 IP as parsed by Golang net.ParseIP - ipv6: an IPv6 IP as parsed by Golang net.ParseIP - cidr: a CIDR as parsed by Golang...