type sockaddr interface {
	Addr

	// family returns the platform-dependent address family
	// identifier.
	family() int

	// isWildcard reports whether the address is a wildcard
	// address.
	isWildcard() bool

	// sockaddr returns the address converted into a syscall
	// sockaddr type that implements syscall.Sockaddr
	// interface. It returns a nil interface when the address is

		return nil, err
	}
	return newFD(fd.net, name, listen, ctl, data, fd.laddr, raddr)
}

func isWildcard(a Addr) bool {
	var wildcard bool
	switch a := a.(type) {
	case *TCPAddr:
		wildcard = a.isWildcard()
	case *UDPAddr:
		wildcard = a.isWildcard()
	case *IPAddr:
		wildcard = a.isWildcard()
	}
	return wildcard
}

func toLocal(a Addr, net string) Addr {
	switch a := a.(type) {

            }

            ModuleIdentifier moduleId = rule.getModuleId();
            IvyArtifactName artifact = rule.getArtifact();
            boolean anyOrganisation = isWildcard(moduleId.getGroup());
            boolean anyModule = isWildcard(moduleId.getName());

            // Build a strongly typed (mergeable) exclude spec for each supplied rule
            if (artifact == null) {

		return false
	}
	var ip IP
	var wildcard bool
	switch addr := addr.(type) {
	case *TCPAddr:
		ip = addr.IP
		wildcard = addr.isWildcard()
	case *UDPAddr:
		ip = addr.IP
		wildcard = addr.isWildcard()
	case *IPAddr:
		ip = addr.IP
		wildcard = addr.isWildcard()
	}

	// Test wildcard IP addresses.
	if wildcard && !testenv.HasExternalNetwork() {
		return false
	}

     */
    public <U> ModelType<? extends U> asSubtype(ModelType<U> modelType) {
        if (isWildcard()) {
            throw new IllegalStateException(this + " is a wildcard type");
        }
        if (modelType.isWildcard()) {
            throw new IllegalArgumentException(modelType + " is a wildcard type");
        }

    }

    @Test
    public void canRepresentWildcardTypeExpression() {
        TypeOf<?> type = new TypeOf<List<? extends Cloneable>>() {}.getActualTypeArguments().get(0);

        assertTrue(type.isWildcard());
        assertEquals(
            type.getUpperBound(),
            new TypeOf<Cloneable>() {});

        assertFalse(type.isSimple());
        assertFalse(type.isArray());

        wildcard ? "DaemonsState{*}" : "DaemonsState{busy=$busy,idle=$idle}"
    }

    boolean matches(DaemonsState rhs) {
        wildcard || (this.busy == rhs.busy && this.idle == rhs.idle)
    }

    boolean isWildcard() {
        busy < 0
    }

            "Array<${kotlinTypeStringFor(componentType!!)}>"
        isParameterized ->
            "$parameterizedTypeDefinition<${actualTypeArguments.joinToString(transform = ::kotlinTypeStringFor)}>"
        isWildcard ->
            (upperBound ?: lowerBound)?.let(::kotlinTypeStringFor) ?: "Any"
        else ->
            toString().let { primitiveTypeStrings[it] ?: it }
    }

	case reflect.Struct:
		for i := 0; i < v.NumField(); i++ {
			e := v.Field(i)
			set(e, f(e))
		}
	case reflect.Interface:
		e := v.Elem()
		set(v, f(e))
	}
	return val
}

func isWildcard(s string) bool {
	rune, size := utf8.DecodeRuneInString(s)
	return size == len(s) && unicode.IsLower(rune)
}

// match reports whether pattern matches val,
// recording wildcard submatches in m.

	}
	if m.Version != q.version {
		return fmt.Sprintf("%s@%s (%s)", q.pattern, q.version, m.Version)
	}
	return q.String()
}

// isWildcard reports whether q is a pattern that can match multiple paths.
func (q *query) isWildcard() bool {
	return q.matchWildcard != nil || (q.patternIsLocal && strings.Contains(q.pattern, "..."))
}

// matchesPath reports whether the given path matches q.pattern.