From b5b99750212eea1ecf70de9f1bac7ec3a0eb4557 Mon Sep 17 00:00:00 2001
From: Alberto Mecca <alberto.mecca@cern.ch>
Date: Mon, 20 Nov 2023 12:13:44 +0100
Subject: [PATCH] Made TH1::EInconsistencyBits public

---
 hist/hist/inc/TH1.h   | 11 +++++++++++
 hist/hist/src/TH1.cxx | 17 ++---------------
 2 files changed, 13 insertions(+), 15 deletions(-)

diff --git a/hist/hist/inc/TH1.h b/hist/hist/inc/TH1.h
index 1d0f2edfce1a6..c74a497ab318f 100644
--- a/hist/hist/inc/TH1.h
+++ b/hist/hist/inc/TH1.h
@@ -83,6 +83,17 @@ class TH1 : public TNamed, public TAttLine, public TAttFill, public TAttMarker {
          kNeutral = 2,  ///< Adapt to the global flag
    };
 
+   /// Enumeration specifying inconsistencies between two histograms,
+   /// in increasing severity.
+   enum  EInconsistencyBits {
+         kFullyConsistent = 0,
+         kDifferentLabels = BIT(0),
+         kDifferentBinLimits = BIT(1),
+         kDifferentAxisLimits = BIT(2),
+         kDifferentNumberOfBins = BIT(3),
+         kDifferentDimensions = BIT(4)
+   };
+
    friend class TH1Merger;
 
 protected:
diff --git a/hist/hist/src/TH1.cxx b/hist/hist/src/TH1.cxx
index e8bc9e6980b6d..e8fd96b93c7cb 100644
--- a/hist/hist/src/TH1.cxx
+++ b/hist/hist/src/TH1.cxx
@@ -594,21 +594,6 @@ extern void H1LeastSquareFit(Int_t n, Int_t m, Double_t *a);
 extern void H1LeastSquareLinearFit(Int_t ndata, Double_t &a0, Double_t &a1, Int_t &ifail);
 extern void H1LeastSquareSeqnd(Int_t n, Double_t *a, Int_t idim, Int_t &ifail, Int_t k, Double_t *b);
 
-namespace {
-
-/// Enumeration specifying inconsistencies between two histograms,
-/// in increasing severity.
-enum EInconsistencyBits {
-   kFullyConsistent = 0,
-   kDifferentLabels = BIT(0),
-   kDifferentBinLimits = BIT(1),
-   kDifferentAxisLimits = BIT(2),
-   kDifferentNumberOfBins = BIT(3),
-   kDifferentDimensions = BIT(4)
-};
-
-} // namespace
-
 ClassImp(TH1);
 
 ////////////////////////////////////////////////////////////////////////////////
@@ -1675,6 +1660,8 @@ bool TH1::CheckConsistentSubAxes(const TAxis *a1, Int_t firstBin1, Int_t lastBin
 
 ////////////////////////////////////////////////////////////////////////////////
 /// Check histogram compatibility.
+/// The returned integer is part of EInconsistencyBits
+/// The value 0 means that the histograms are compatible
 
 Int_t TH1::CheckConsistency(const TH1* h1, const TH1* h2)
 {