ENH: add ListOps find/found accepting a unary predicate (#1182)

- can also be used for other purposes.
  Eg,

      if (ListOps::found(list, matcher))
      {
         ...
      }

  vs.

      if (!findStrings(matcher, list).empty())
      {
         ...
      }

src/OpenFOAM/containers/Lists/ListOps/ListOps.H

@@ -582,6 +582,32 @@ struct greater
 };
 
 
+//- Find index of the first occurrence that satisfies the predicate.
+//  When start is specified, any occurrences before start are ignored.
+//  Linear search.
+//  \return position in list or -1 if not found.
+template<class ListType, class UnaryPredicate>
+label find
+(
+    const ListType& input,
+    const UnaryPredicate& pred,
+    const label start=0
+);
+
+
+//- True if there is a value in the list that satisfies the predicate.
+//  When start is specified, any occurences before start are ignored.
+//  Linear search.
+//  \return true if found.
+template<class ListType, class UnaryPredicate>
+bool found
+(
+    const ListType& input,
+    const UnaryPredicate& pred,
+    const label start=0
+);
+
+
 //- Set various locations of the list with a specified value.
 //
 //  \param list the list to modify

src/OpenFOAM/containers/Lists/ListOps/ListOpsTemplates.C

@@ -1097,6 +1097,43 @@ void Foam::ListOps::uniqueEqOp<T>::operator()
 }
 
 
+template<class ListType, class UnaryPredicate>
+Foam::label Foam::ListOps::find
+(
+    const ListType& input,
+    const UnaryPredicate& pred,
+    const label start
+)
+{
+    const label len = input.size();
+
+    if (start >= 0)
+    {
+        for (label i = start; i < len; ++i)
+        {
+            if (pred(input[i]))
+            {
+                return i;
+            }
+        }
+    }
+
+    return -1;
+}
+
+
+template<class ListType, class UnaryPredicate>
+bool Foam::ListOps::found
+(
+    const ListType& input,
+    const UnaryPredicate& pred,
+    const label start
+)
+{
+    return (ListOps::find(input, pred, start) >= 0);
+}
+
+
 template<class T>
 void Foam::ListOps::setValue
 (

src/OpenFOAM/primitives/ranges/MinMax/MinMax.H

@@ -111,6 +111,7 @@ namespace Foam
 template<class T> class MinMax;
 
 // Common min/max types
+typedef MinMax<label> labelMinMax;
 typedef MinMax<scalar> scalarMinMax;
 
 

src/overset/cellCellStencil/trackingInverseDistance/voxelMeshSearch.C

@@ -425,7 +425,7 @@ Foam::label Foam::voxelMeshSearch::findCell(const point& p) const
                     label nei = mesh_.faceNeighbour()[facei];
                     nextCell = (own == celli ? nei : own);
 
-                    if (findIndex(track_, nextCell, startOfTrack) != -1)
+                    if (track_.found(nextCell, startOfTrack))
                     {
                         return celli;
                     }
@@ -438,7 +438,7 @@ Foam::label Foam::voxelMeshSearch::findCell(const point& p) const
                     {
                         return nextCell;
                     }
-                    else if (findIndex(track_, nextCell, startOfTrack) != -1)
+                    else if (track_.found(nextCell, startOfTrack))
                     {
                         return -1;  // point is really out
                     }

src/sampling/sampledSet/sampledSets/sampledSetsGrouping.C

@@ -26,8 +26,8 @@ License
 #include "sampledSets.H"
 #include "volFields.H"
 #include "IOobjectList.H"
-#include "stringListOps.H"
 #include "UIndirectList.H"
+#include "ListOps.H"
 
 // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
@@ -69,7 +69,7 @@ Foam::label Foam::sampledSets::classifyFields()
     // Detect missing fields
     forAll(fieldSelection_, i)
     {
-        if (findStrings(fieldSelection_[i], allFields).empty())
+        if (!ListOps::found(allFields, fieldSelection_[i]))
         {
             missed.append(i);
         }

src/sampling/sampledSurface/sampledSurfaces/sampledSurfacesGrouping.C

@@ -25,8 +25,8 @@ License
 
 #include "sampledSurfaces.H"
 #include "IOobjectList.H"
-#include "stringListOps.H"
 #include "UIndirectList.H"
+#include "ListOps.H"
 
 // * * * * * * * * * * * * * Private Member Functions  * * * * * * * * * * * //
 
@@ -57,7 +57,7 @@ Foam::label Foam::sampledSurfaces::classifyFields()
     // Detect missing fields
     forAll(fieldSelection_, i)
     {
-        if (findStrings(fieldSelection_[i], allFields).empty())
+        if (!ListOps::found(allFields, fieldSelection_[i]))
         {
             missed.append(i);
         }

src/sampling/surface/isoSurface/isoSurfaceTopo.C

@@ -641,7 +641,7 @@ void Foam::isoSurfaceTopo::generateTriPoints
         forAll(f1, fp)
         {
             oppositeI = f1[fp];
-            if (findIndex(f0, oppositeI) == -1)
+            if (!f0.found(oppositeI))
             {
                 break;
             }