ENH: change return type of Time::stopAt to report if the setting changed

src/OpenFOAM/db/Time/Time.C

@@ -552,8 +552,9 @@ bool Foam::Time::end() const
 }
 
 
-void Foam::Time::stopAt(const stopAtControls sa) const
+bool Foam::Time::stopAt(const stopAtControls sa) const
 {
+    const bool changed = (stopAt_ != sa);
     stopAt_ = sa;
 
     // adjust endTime
@@ -565,6 +566,7 @@ void Foam::Time::stopAt(const stopAtControls sa) const
     {
         endTime_ = GREAT;
     }
+    return changed;
 }
 
 

src/OpenFOAM/db/Time/Time.H

@@ -406,7 +406,8 @@ public:
 
             //- Adjust the current stopAtControl. Note that this value
             //  only persists until the next time the dictionary is read.
-            virtual void stopAt(const stopAtControls) const;
+            //  Return true if the stopAtControl changed.
+            virtual bool stopAt(const stopAtControls) const;
 
             //- Reset the time and time-index to those of the given time
             virtual void setTime(const Time&);