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// clone.h: Rcpp R/C++ interface class library -- clone RObject's
//
// Copyright (C) 2010 - 2025 Dirk Eddelbuettel and Romain Francois
//
// This file is part of Rcpp.
//
// Rcpp is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 2 of the License, or
// (at your option) any later version.
//
// Rcpp is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Rcpp. If not, see <http://www.gnu.org/licenses/>.
#ifndef Rcpp__StringTransformer_h
#define Rcpp__StringTransformer_h
#include <RcppCommon.h>
namespace Rcpp{
template <typename UnaryOperator>
class StringTransformer : public std::function<const char*(const char*)> {
public:
StringTransformer( const UnaryOperator& op_ ): op(op_), buffer(){}
~StringTransformer(){}
const char* operator()(const char* input ) {
buffer = input;
std::transform( buffer.begin(), buffer.end(), buffer.begin(), op );
return buffer.c_str();
}
private:
const UnaryOperator& op;
std::string buffer;
};
template <typename UnaryOperator>
StringTransformer<UnaryOperator> make_string_transformer( const UnaryOperator& fun){
return StringTransformer<UnaryOperator>( fun );
}
}
#endif
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