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RooRealConstant.h
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1 /*****************************************************************************
2  * Project: RooFit *
3  * Package: RooFitCore *
4  * File: $Id: RooRealConstant.h,v 1.13 2007/05/11 09:11:30 verkerke Exp $
5  * Authors: *
6  * WV, Wouter Verkerke, UC Santa Barbara, verkerke@slac.stanford.edu *
7  * DK, David Kirkby, UC Irvine, dkirkby@uci.edu *
8  * *
9  * Copyright (c) 2000-2005, Regents of the University of California *
10  * and Stanford University. All rights reserved. *
11  * *
12  * Redistribution and use in source and binary forms, *
13  * with or without modification, are permitted according to the terms *
14  * listed in LICENSE (http://roofit.sourceforge.net/license.txt) *
15  *****************************************************************************/
16 #ifndef ROO_REAL_CONSTANT
17 #define ROO_REAL_CONSTANT
18 
19 #include "Rtypes.h"
20 
21 class RooAbsReal ;
22 class RooArgList ;
23 #include "RooConstVar.h"
24 
26 public:
27 
28  inline RooRealConstant() {} ;
29  virtual ~RooRealConstant() {} ;
30  static RooConstVar& value(Double_t value) ;
31 
32  static RooConstVar& removalDummy() ;
33 
34 protected:
35 
36  static RooArgList& constDB();
37 
38  ClassDef(RooRealConstant,0) // RooRealVar constants factory
39 };
40 
41 
42 #endif
43 
RooRealConstant provides static functions to create and keep track of RooRealVar constants.
#define ClassDef(name, id)
Definition: Rtypes.h:322
RooConstVar represent a constant real-valued object.
Definition: RooConstVar.h:25
virtual ~RooRealConstant()
RooAbsReal is the common abstract base class for objects that represent a real value and implements f...
Definition: RooAbsReal.h:60
static RooArgList & constDB()
One-time initialization of constants database.
static RooConstVar & removalDummy()
Create a dummy node used in node-removal operations.
static RooConstVar & value(Double_t value)
Return a constant value object with given value.
RooArgList is a container object that can hold multiple RooAbsArg objects.
Definition: RooArgList.h:21