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// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; indent-tabs-mode: nil; -*-
//
// InternalFunction_with_std_function.h: Rcpp R/C++ interface class library -- exposing C++ std::function's
//
// Copyright (C) 2014 Christian Authmann
// Copyright (C) 2015 Romain Francois and Dirk Eddelbuettel
//
// 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_InternalFunctionWithStdFunction_h
#define Rcpp_InternalFunctionWithStdFunction_h
#include <functional>
namespace Rcpp {
namespace InternalFunctionWithStdFunction {
#include <Rcpp/generated/InternalFunctionWithStdFunction_call.h>
template <typename RESULT_TYPE, typename... Args>
class CppFunctionBaseFromStdFunction : public CppFunctionBase {
public:
CppFunctionBaseFromStdFunction(const std::function<RESULT_TYPE(Args...)> &fun) : fun(fun) {}
virtual ~CppFunctionBaseFromStdFunction() {}
SEXP operator()(SEXP* args) {
BEGIN_RCPP
auto result = call<RESULT_TYPE, Args...>(fun, args);
return Rcpp::module_wrap<RESULT_TYPE>(result);
END_RCPP
}
private:
const std::function<RESULT_TYPE(Args...)> fun;
};
template <typename... Args>
class CppFunctionBaseFromStdFunction<void, Args...> : public CppFunctionBase {
public:
CppFunctionBaseFromStdFunction(const std::function<void(Args...)> &fun) : fun(fun) {}
virtual ~CppFunctionBaseFromStdFunction() {}
SEXP operator()(SEXP* args) {
BEGIN_RCPP
call<void, Args...>(fun, args);
END_RCPP
}
private:
const std::function<void(Args...)> fun;
};
} // namespace InternalFunctionWithStdFunction
} // namespace Rcpp
#endif
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