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/*
neg.hh, copyright (c) 2006 by Vincent Fourmond:
The class definition for negation.
This program 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.
This program 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 (in the COPYING file).
*/
namespace SCalc {
class Neg : public Expression {
protected:
Expression * neg;
public:
Neg(Session * s, Expression * su) : Expression(s) { neg = su;};
virtual ~Neg() { delete neg;};
virtual double evaluate(const double * d, const double *e) {
return - neg->evaluate(d,e);
};
virtual Expression * copy() {
return new Neg(session(), neg->copy());
};
virtual Expression * derive(int id) {
return new Neg(session(), neg->derive(id));
};
virtual Expression * simplify();
virtual std::set<int> used_variables() {
return neg->used_variables();
};
virtual std::string pretty_print();
};
};
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