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CLHEP/GenericFunctions/ConstPlusFunction.hh
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// -*- C++ -*-
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// $Id: ConstPlusFunction.hh,v 1.2 2003/09/06 14:04:13 boudreau Exp $
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//--------------------------ConstPlusFunction-------------------------------//
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// //
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// ConstPlusFunction, result of adding a function and a constant //
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// Joe Boudreau, Petar Maksimovic, November 1999 //
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// //
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//--------------------------------------------------------------------------//
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#ifndef ConstPlusFunction_h
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#define ConstPlusFunction_h 1
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#include "
CLHEP/GenericFunctions/AbsFunction.hh
"
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namespace
Genfun {
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class
ConstPlusFunction
:
public
AbsFunction
{
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FUNCTION_OBJECT_DEF
(
ConstPlusFunction
)
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public
:
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// Constructor
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ConstPlusFunction
(
double
constant,
const
AbsFunction
*arg);
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// Copy constructor
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ConstPlusFunction
(
const
ConstPlusFunction
&right);
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// Destructor
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virtual
~ConstPlusFunction
();
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// Retreive function value
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virtual
double
operator ()
(
double
argument)
const
;
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virtual
double
operator ()
(
const
Argument
&
a
)
const
;
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// Dimensionality
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virtual
unsigned
int
dimensionality
()
const
;
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// Derivative.
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Derivative
partial
(
unsigned
int
)
const
;
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// Does this function have an analytic derivative?
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virtual
bool
hasAnalyticDerivative
()
const
{
return
true
;}
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private
:
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// It is illegal to assign a ConstPlusFunction
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const
ConstPlusFunction
& operator=(
const
ConstPlusFunction
&right);
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double
_constant;
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const
AbsFunction
*_arg;
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};
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}
// namespace Genfun
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#endif
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