evaluation.h

Go to the documentation of this file.

#ifndef EVALUATION_H
#define EVALUATION_H
#pragma once
/***************************************************************************
 *   Copyright (C) 2007-2013 Mike Kinghan, imk@burroingroingjoing.com      *
 *   All rights reserved.                                                  *
 *                                                                         *
 *   Originally contributed by Mike Kinghan, imk@burroingroingjoing.com.   *
 *                                                                         *
 *   Redistribution and use in source and binary forms, with or without    *
 *   modification, are permitted provided that the following conditions    *
 *   are met:                                                              *
 *                                                                         *
 *   Redistributions of source code must retain the above copyright        *
 *   notice, this list of conditions and the following disclaimer.         *
 *                                                                         *
 *   Redistributions in binary form must reproduce the above copyright     *
 *   notice, this list of conditions and the following disclaimer in the   *
 *   documentation and/or other materials provided with the distribution.  *
 *                                                                         *
 *   Neither the name of Mike Kinghan nor the names of its contributors    *
 *   may be used to endorse or promote products derived from this software *
 *   without specific prior written permission.                            *
 *                                                                         *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS   *
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT     *
 *   LIMITED TO, THE IMPLIED WARRANTIES OF  MERCHANTABILITY AND FITNESS    *
 *   FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE        *
 *   COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,   *
 *   INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,  *
 *   BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS *
 *   OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED    *
 *   AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,*
 *   OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF *
 *   THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH  *
 *   DAMAGE.                                                               *
 *                                                                         *
 **************************************************************************/
#include "integer.h"

struct evaluation {

    evaluation() = default;

        explicit evaluation(integer const & val)
                :       _value(val){}

        explicit evaluation(int val)
                :       _value(integer(INT_INT,val)){}

        bool resolved() const {
                return _value.type() != INT_UNDEF;
        }

        bool is_true() const {
                return resolved() && _value.raw() != 0;
        }

        bool is_false() const {
                return resolved() && _value.raw() == 0;
        }

        bool insoluble() const {
                return _insoluble;
        }

        bool empty() const {
                return _empty;
        }

        unsigned short & net_infix_ops() {
                return _net_infix_ops;
        }

        integer const & value() const {
                return _value;
        }

        void set_value(integer const & val) {
                _value = val;
                _net_infix_ops = 0;
        }

        void set_value(int val) {
                _value = integer(INT_INT,val);
                _net_infix_ops = 0;
        }

        void set_insoluble() {
                _value = integer(INT_UNDEF);
                _insoluble = true;
        }

        void set_empty() {
                _empty = true;
        }

        void set_parens_off(size_t loff, size_t roff) {
                _lparen_off = loff;
                _rparen_off = roff;
        }

        void clear_parens_off() {
                _lparen_off = size_t(-1);
                _rparen_off = size_t(-1);
        }

        size_t lparen_off() const {
                return _lparen_off;
        }

        size_t rparen_off() const {
                return _rparen_off;
        }

private:
        integer _value{INT_UNDEF};
        unsigned short _net_infix_ops = 0;
        bool _empty = false;
        bool _insoluble = false;
        size_t _lparen_off = size_t(-1);
        size_t _rparen_off = size_t(-1);
};

#endif /* EOF*/