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RooConstVar.cxx
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1 /*****************************************************************************
2  * Project: RooFit *
3  * Package: RooFitCore *
4  * @(#)root/roofitcore:$Id$
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 
17 /**
18 \file RooConstVar.cxx
19 \class RooConstVar
20 \ingroup Roofitcore
21 
22 RooConstVar represent a constant real-valued object
23 **/
24 
25 
26 #include "RooFit.h"
27 
28 #include "Riostream.h"
29 #include "RooConstVar.h"
30 
31 using namespace std;
32 
34  ;
35 
36 
37 
38 ////////////////////////////////////////////////////////////////////////////////
39 /// Constructor with value
40 ///_fast = kTRUE ;
41 
42 RooConstVar::RooConstVar(const char *name, const char *title, Double_t value) :
43  RooAbsReal(name,title), _value(value)
44 {
45  setAttribute("Constant",kTRUE) ;
46 }
47 
48 
49 
50 ////////////////////////////////////////////////////////////////////////////////
51 /// Copy constructor
52 ///_fast = kTRUE ;
53 
54 RooConstVar::RooConstVar(const RooConstVar& other, const char* name) :
55  RooAbsReal(other, name), _value(other._value)
56 {
57 }
58 
59 
60 
61 ////////////////////////////////////////////////////////////////////////////////
62 /// Destructor
63 
65 {
66 }
67 
68 
69 
70 ////////////////////////////////////////////////////////////////////////////////
71 /// Return value
72 
74 {
75  return _value ;
76 }
77 
78 
79 
80 ////////////////////////////////////////////////////////////////////////////////
81 /// Write object contents to stream
82 
83 void RooConstVar::writeToStream(ostream& os, Bool_t /*compact*/) const
84 {
85  os << _value ;
86 }
87 
void setAttribute(const Text_t *name, Bool_t value=kTRUE)
Set (default) or clear a named boolean attribute of this object.
Definition: RooAbsArg.cxx:266
bool Bool_t
Definition: RtypesCore.h:59
RooConstVar represent a constant real-valued object.
Definition: RooConstVar.h:25
virtual ~RooConstVar()
Destructor.
Definition: RooConstVar.cxx:64
ClassImp(RooConstVar)
TPaveLabel title(3, 27.1, 15, 28.7,"ROOT Environment and Tools")
Double_t _value
Definition: RooConstVar.h:49
double Double_t
Definition: RtypesCore.h:55
RooAbsReal is the common abstract base class for objects that represent a real value and implements f...
Definition: RooAbsReal.h:53
void writeToStream(std::ostream &os, Bool_t compact) const
Write object contents to stream.
Definition: RooConstVar.cxx:83
#define name(a, b)
Definition: linkTestLib0.cpp:5
virtual Double_t getValV(const RooArgSet *set=0) const
Return value.
Definition: RooConstVar.cxx:73
const Bool_t kTRUE
Definition: Rtypes.h:91
float value
Definition: math.cpp:443