// -*- mode: c++; c-basic-offset:4 -*-

// This file is part of libdap, A C++ implementation of the OPeNDAP Data

// Access Protocol.

// Copyright (c) 2002,2003 OPeNDAP, Inc.

// Author: James Gallagher <jgallagher@opendap.org>

//

// This library is free software; you can redistribute it and/or

// modify it under the terms of the GNU Lesser General Public

// License as published by the Free Software Foundation; either

// version 2.1 of the License, or (at your option) any later version.

//

// This library 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

// Lesser General Public License for more details.

//

// You should have received a copy of the GNU Lesser General Public

// License along with this library; if not, write to the Free Software

// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

//

// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.

// (c) COPYRIGHT URI/MIT 1998-1999

// Please read the full copyright statement in the file COPYRIGHT_URI.

//

// Authors:

//      jhrg,jimg       James Gallagher <jgallagher@gso.uri.edu>

#ifndef _rvalue_h

#define _rvalue_h

#include <dods-datatypes.h>

namespace libdap

{

/** Holds the rvalues for the parser, Clause objects and evaluator.

    @see Clause.h

    @see DDS.h

    @see expr.y */

class rvalue

{

private:

    BaseType *d_value;

    btp_func d_func;  // pointer to a function returning BaseType *

    std::vector<rvalue *> *d_args;  // arguments to the function

public:

    typedef std::vector<rvalue *>::iterator Args_iter ;

    typedef std::vector<rvalue *>::const_iterator Args_citer ;

    rvalue(BaseType *bt);

    rvalue(btp_func f, std::vector<rvalue *> *a);

    rvalue();

    virtual ~rvalue();

    std::string value_name();

    BaseType *bvalue(DDS &dds;;

};

// This type def must come after the class definition above. It is used in

// the Clause and DDS classes.

typedef std::vector<rvalue *> rvalue_list;

typedef std::vector<rvalue *>::const_iterator rvalue_list_citer ;

typedef std::vector<rvalue *>::iterator rvalue_list_iter ;

typedef std::vector<dods_byte> *byte_arg_list;

typedef std::vector<dods_int16> *int16_arg_list;

typedef std::vector<dods_uint16> *uint16_arg_list;

typedef std::vector<dods_int32> *int32_arg_list;

typedef std::vector<dods_uint32> *uint32_arg_list;

typedef std::vector<dods_float32> *float32_arg_list;

typedef std::vector<dods_float64> *float64_arg_list;

rvalue_list *make_rvalue_list(rvalue *rv);

rvalue_list *append_rvalue_list(rvalue_list *rvals, rvalue *rv);

BaseType **build_btp_args(rvalue_list *args, DDS &dds;;

} // namespace libdap

#endif // _rvalue_h