CppFunction.h

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// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; indent-tabs-mode: nil; -*-
//
// CppFunction.h: Rcpp R/C++ interface class library -- C++ exposed function
//
// Copyright (C) 2012 - 2013 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_Module_CppFunction_h
#define Rcpp_Module_CppFunction_h
 
namespace Rcpp {
 
        class CppFunctionBase {
        public:
                CppFunctionBase() {}
        virtual ~CppFunctionBase(){} ;
 
        virtual SEXP operator()(SEXP*) {
            return R_NilValue ;
        }
 
        };
 
    class CppFunction : public CppFunctionBase {
    public:
        CppFunction(const char* doc = 0) : docstring( doc == 0 ? "" : doc) {}
        virtual ~CppFunction(){} ;
 
        virtual int nargs(){ return 0 ; }
 
        virtual bool is_void(){ return false ; }
 
        virtual void signature(std::string&, const char* ){}
 
        virtual SEXP get_formals(){ return R_NilValue; }
 
        virtual DL_FUNC get_function_ptr() = 0  ;
 
        std::string docstring ;
    };
 
}
#endif