1decltype(auto) operator()( const Child<TYPE,ALLOW,CONVERTER,FILTER> &kwd, KEYWORDS &&...kwds ) const;
2decltype(auto) operator()( const Child<TYPE,ALLOW,CONVERTER,FILTER> &kwd, KEYWORDS &&...kwds );
3decltype(auto) operator()( const Child<TYPE,ALLOW,CONVERTER,FILTER> &kwd, const string label, KEYWORDS &&...kwds ) const;
4decltype(auto) operator()( const Child<TYPE,ALLOW,CONVERTER,FILTER> &kwd, const string label, KEYWORDS &&...kwds );
5decltype(auto) operator()( const Child<TYPE,ALLOW,CONVERTER,FILTER> &kwd, const char *const label, KEYWORDS &&...kwds ) const;
6decltype(auto) operator()( const Child<TYPE,ALLOW,CONVERTER,FILTER> &kwd, const char *const label, KEYWORDS &&...kwds );
7decltype(auto) operator()( const Child<TYPE,ALLOW,CONVERTER,FILTER> &kwd, const regex labelRegex, KEYWORDS &&...kwds ) const;
8decltype(auto) operator()( const Child<TYPE,ALLOW,CONVERTER,FILTER> &kwd, const regex labelRegex, KEYWORDS &&...kwds );
9decltype(auto) operator()( const Child<TYPE,ALLOW,CONVERTER,FILTER> &kwd, const pair<Child,label>, KEYWORDS &&...kwds ) const;
10decltype(auto) operator()( const Child<TYPE,ALLOW,CONVERTER,FILTER> &kwd, const pair<Child,label>, KEYWORDS &&...kwds );