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math++
calculator.h
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// Math Type Library
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// $Id: calculator.h,v 1.1 2002/04/20 06:39:18 cparpart Exp $
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// (defines the interface for the function calculator)
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//
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// Copyright (c) 2002 by Christian Parpart <cparpart@surakware.net>
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library 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 GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public License
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// along with this library; see the file COPYING.LIB. If not, write to
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// the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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// Boston, MA 02111-1307, USA.
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#ifndef libmath_calculator_h
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#define libmath_calculator_h
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#include <math++/visitor.h>
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#include <math++/error.h>
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#include <string>
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#include <map>
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namespace
math {
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template
<
class
>
class
TFunction;
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template
<
class
>
class
TLibrary;
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class
ECalcError
:
public
EMath
{
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public
:
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ECalcError
(
const
std::string& AReason) :
EMath
(AReason) {}
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};
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template
<
class
T>
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class
TCalculator
:
protected
TNodeVisitor
<T> {
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public
:
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static
T
calculate
(
const
TFunction<T>
& AFunction,
const
T& AParam,
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const
TLibrary<T>
& ALibrary,
unsigned
ARecursionLimit = 64);
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private
:
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T FParam;
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const
TLibrary<T>
& FLibrary;
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std::map<std::string, unsigned> FRecursions;
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unsigned
FLimit;
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T FResult;
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private
:
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TCalculator
(
const
TFunction<T>
& AFunction,
const
T& AParam,
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const
TLibrary<T>
& ALibrary,
unsigned
ALimit);
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T
calculate
(
const
TNode<T>
*AExpression);
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virtual
void
visit(
TNumberNode<T>
*);
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virtual
void
visit(
TSymbolNode<T>
*);
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virtual
void
visit(
TParamNode<T>
*);
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virtual
void
visit(
TPlusNode<T>
*);
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virtual
void
visit(
TNegNode<T>
*);
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virtual
void
visit(
TMulNode<T>
*);
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virtual
void
visit(
TDivNode<T>
*);
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virtual
void
visit(
TPowNode<T>
*);
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virtual
void
visit(
TSqrtNode<T>
*);
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virtual
void
visit(
TSinNode<T>
*);
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virtual
void
visit(
TCosNode<T>
*);
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virtual
void
visit(
TTanNode<T>
*);
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virtual
void
visit(
TLnNode<T>
*);
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virtual
void
visit(
TFuncNode<T>
*);
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virtual
void
visit(
TIfNode<T>
*);
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virtual
void
visit(
TEquNode<T>
*);
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virtual
void
visit(
TUnEquNode<T>
*);
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virtual
void
visit(
TGreaterNode<T>
*);
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virtual
void
visit(
TLessNode<T>
*);
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virtual
void
visit(
TGreaterEquNode<T>
*);
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virtual
void
visit(
TLessEquNode<T>
*);
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};
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}
// namespace math
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#include <math++/calculator.tcc>
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#endif
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