}
			return false
		}, nil
	}

	var rfx []*regexp.Regexp
	for _, tagf := range strings.Split(value, ",") {
		fx, err := regexp.Compile(tagf)
		if err != nil {
			return nil, fmt.Errorf("parsing %s regexp: %v", name, err)
		}
		rfx = append(rfx, fx)
	}
	if wantKey == "" {
		return func(s *profile.Sample) bool {
		matchedrx:
			for _, rx := range rfx {
				for key, vals := range s.Label {