21 #ifndef Rcpp__StringTransformer_h
22 #define Rcpp__StringTransformer_h
28 template <
typename UnaryOperator>
29 #if __cplusplus < 201103L
45 const UnaryOperator&
op;
49 template <
typename UnaryOperator>
StringTransformer< UnaryOperator > make_string_transformer(const UnaryOperator &fun)