From 2c44ac299de967a134ae98b1dbffc1555d7785bd Mon Sep 17 00:00:00 2001
From: Mark Olesen <Mark.Olesen@esi-group.com>
Date: Thu, 8 Nov 2018 11:34:02 +0100
Subject: [PATCH] ENH: add bitSet::operator() for predicate use (as per
 HashSet)

---
 src/OpenFOAM/containers/Bits/bitSet/bitSet.H  | 4 ++++
 src/OpenFOAM/containers/Bits/bitSet/bitSetI.H | 6 ++++++
 2 files changed, 10 insertions(+)

diff --git a/src/OpenFOAM/containers/Bits/bitSet/bitSet.H b/src/OpenFOAM/containers/Bits/bitSet/bitSet.H
index 7352771028..ac5fbbd738 100644
--- a/src/OpenFOAM/containers/Bits/bitSet/bitSet.H
+++ b/src/OpenFOAM/containers/Bits/bitSet/bitSet.H
@@ -493,6 +493,10 @@ public:
 
     // Member Operators
 
+        //- Test value at specified position, same as test()
+        //  Enables use as a predicate
+        inline bool operator()(const label pos) const;
+
         //- Identical to get() - get value at index.
         //  Never auto-vivify entries.
         inline unsigned int operator[](const label i) const;
diff --git a/src/OpenFOAM/containers/Bits/bitSet/bitSetI.H b/src/OpenFOAM/containers/Bits/bitSet/bitSetI.H
index 454fc2b76c..f2e648ca3f 100644
--- a/src/OpenFOAM/containers/Bits/bitSet/bitSetI.H
+++ b/src/OpenFOAM/containers/Bits/bitSet/bitSetI.H
@@ -621,6 +621,12 @@ inline Foam::bitSet& Foam::bitSet::extend(const bitSet& other)
 
 // * * * * * * * * * * * * * * * Member Operators  * * * * * * * * * * * * * //
 
+inline bool Foam::bitSet::operator()(const label pos) const
+{
+    return test(pos);
+}
+
+
 inline unsigned int Foam::bitSet::operator[](const label i) const
 {
     return get(i);