return n
}

const badKey = "!BADKEY"

// argsToAttr turns a prefix of the nonempty args slice into an Attr
// and returns the unconsumed portion of the slice.
// If args[0] is an Attr, it returns it.
// If args[0] is a string, it treats the first two elements as
// a key-value pair.
// Otherwise, it treats args[0] as a value with a missing key.
func argsToAttr(args []any) (Attr, []any) {
	switch x := args[0].(type) {

	return Attr{key, GroupValue(argsToAttrSlice(args)...)}
}

func argsToAttrSlice(args []any) []Attr {
	var (
		attr  Attr
		attrs []Attr
	)
	for len(args) > 0 {
		attr, args = argsToAttr(args)
		attrs = append(attrs, attr)
	}
	return attrs
}

// Any returns an Attr for the supplied value.
// See [AnyValue] for how values are treated.
func Any(key string, value any) Attr {