kopia lustrzana https://github.com/weetmuts/wmbusmeters
46 wiersze
1.2 KiB
C
46 wiersze
1.2 KiB
C
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/*
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Copyright (C) 2022 Fredrik Öhrström (gpl-3.0-or-later)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef FORMULA_H
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#define FORMULA_H
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#include<memory>
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#include<vector>
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#include"units.h"
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struct Meter;
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struct FieldInfo;
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struct Formula
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{
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virtual bool parse(Meter *m, const std::string &f) = 0;
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virtual bool valid() = 0;
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virtual double calculate(Unit to) = 0;
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virtual void clear() = 0;
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// Return a regenerated formula string.
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virtual std::string str() = 0;
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// Return the formula in a format where the tree structure is explicit.
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virtual std::string tree() = 0;
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virtual ~Formula() = 0;
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};
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Formula *newFormula();
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#endif
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