Coverity fix
[u/mrichter/AliRoot.git] / PWG2 / RESONANCES / AliRsnExpression.h
CommitLineData
4fbb2459 1//
9477aa42 2// AliRsnExpresion class is used to
3// handle operators &|!
4// in AliRsnCut
4fbb2459 5//
6// authors: Martin Vala (martin.vala@cern.ch)
7// Alberto Pulvirenti (alberto.pulvirenti@ct.infn.it)
8//
9
baca856a 10#ifndef ALIRSNEXPRESSION_H
11#define ALIRSNEXPRESSION_H
12
13#include <TObject.h>
baca856a 14
15class TObjArray;
4fbb2459 16#include "AliRsnCutSet.h"
17class AliRsnVariableExpression;
baca856a 18
2a1c7696 19class AliRsnExpression : public TObject {
baca856a 20
2a1c7696 21public:
aec0ec32 22
2a1c7696 23 // operators for complex cut expressions
24 enum ECutOp {
25 kOpAND = 1, // AND '&'
aec0ec32 26 kOpOR, // OR '|'
27 kOpNOT // Unary negation '!'
2a1c7696 28 };
aec0ec32 29
2a1c7696 30 AliRsnExpression() : fVname(0), fArg1(0), fArg2(0), fOperator(0) {}
31 AliRsnExpression(TString exp);
32 virtual ~AliRsnExpression();
33 AliRsnExpression(const AliRsnExpression& exp);
34 AliRsnExpression& operator= (const AliRsnExpression& exp);
baca856a 35
2a1c7696 36 virtual Bool_t Value(TObjArray & vars);
37 virtual TString Unparse() const;
baca856a 38
2a1c7696 39 void SetCutSet(AliRsnCutSet* const theValue) { fgCutSet = theValue; }
40 AliRsnCutSet* GetCutSet() const { return fgCutSet; }
baca856a 41
42
2a1c7696 43 TString fVname; // Variable name
44 static AliRsnCutSet *fgCutSet; // global cutset
baca856a 45
2a1c7696 46private:
47 AliRsnExpression* fArg1; // left argument
48 AliRsnExpression* fArg2; // right argument
49 Int_t fOperator; // operator
baca856a 50
2a1c7696 51 AliRsnExpression(int op, AliRsnExpression* a);
52 AliRsnExpression(int op, AliRsnExpression* a, AliRsnExpression* b);
baca856a 53
2a1c7696 54 TObjArray* Tokenize(TString str) const;
55 static AliRsnExpression* Element(TObjArray &st, Int_t &i);
56 static AliRsnExpression* Primary(TObjArray &st, Int_t &i);
57 static AliRsnExpression* Expression(TObjArray &st, Int_t &i);
baca856a 58
2a1c7696 59 ClassDef(AliRsnExpression, 1); // Class to evaluate an expression
baca856a 60};
61
baca856a 62#endif