STYLE: rebase edge on labelPair, additional methods in Pair

- use FixedList first/last in Pair first/second

- consistent first/second access for line

applications/utilities/mesh/generation/foamyMesh/conformalVoronoiMesh/cellSizeControlSurfaces/surfaceCellSizeFunction/cellSizeCalculationType/automatic/automatic.C

@@ -282,7 +282,7 @@ Foam::tmp<Foam::triSurfacePointScalarField> Foam::automatic::load()
 
         forAll(surface_, fI)
         {
-            faces[fI] = surface_.triSurface::operator[](fI).triFaceFace();
+            faces[fI] = surface_.triSurface::operator[](fI);
         }
 
         vtkSurfaceWriter().write

applications/utilities/mesh/generation/foamyMesh/foamyHexMeshBackgroundMesh/foamyHexMeshBackgroundMesh.C

@@ -721,7 +721,7 @@ int main(int argc, char *argv[])
         isoFaces.setSize(iso.size());
         forAll(isoFaces, i)
         {
-            isoFaces[i] = iso[i].triFaceFace();
+            isoFaces[i] = iso[i];
         }
         isoPoints = iso.points();
     }

applications/utilities/surface/surfaceCheck/surfaceCheck.C

@@ -150,7 +150,7 @@ void writeZoning
     faceList faces(surf.size());
     forAll(surf, i)
     {
-        faces[i] = surf[i].triFaceFace();
+        faces[i] = surf[i];
     }
 
     vtkSurfaceWriter().write

applications/utilities/surface/surfaceFeatureExtract/surfaceFeatureExtract.C

@@ -368,7 +368,7 @@ int main(int argc, char *argv[])
             faces.setSize(surf.size());
             forAll(surf, fi)
             {
-                faces[fi] = surf[fi].triFaceFace();
+                faces[fi] = surf[fi];
             }
         }
 

src/OpenFOAM/meshes/meshShapes/edge/edge.H

@@ -28,7 +28,7 @@ Description
     An edge is a list of two point labels. The functionality it provides
     supports the discretisation on a 2-D flat mesh.
 
-    The edge is implemented as a FixedList of labels.
+    The edge is implemented as a Pair/FixedList of labels.
     As well as geometrically relevant methods, it also provides methods
     similar to HashSet for additional convenience.
     Valid point labels are always non-negative (since they correspond to
@@ -37,6 +37,7 @@ Description
     can be filled with a HashSet-like functionality.
 
 SourceFiles
+    edge.C
     edgeI.H
 
 \*---------------------------------------------------------------------------*/
@@ -44,10 +45,9 @@ SourceFiles
 #ifndef edge_H
 #define edge_H
 
-#include "FixedList.H"
 #include "labelPair.H"
-#include "pointField.H"
 #include "linePointRef.H"
+#include "pointField.H"
 
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
@@ -60,7 +60,7 @@ namespace Foam
 
 class edge
 :
-    public FixedList<label, 2>
+    public labelPair
 {
     // Private Member Functions
 
@@ -93,19 +93,19 @@ public:
         //- Construct null with invalid point labels (-1)
         inline edge();
 
-        //- Construct from components
+        //- Construct from two point labels
         inline edge(const label from, const label to);
 
-        //- Construct, optionally sorted with start less-than end
-        inline edge(const label from, const label to, const bool doSort);
-
-        //- Construct from two labels
+        //- Construct from pair of labels
         inline edge(const labelPair& pair);
 
-        //- Construct from FixedList
+        //- Construct from list
         inline edge(const FixedList<label, 2>& lst);
 
-        //- Construct, optionally sorted with start less-than end
+        //- Construct from two point labels, sorted with first less-than second
+        inline edge(const label from, const label to, const bool doSort);
+
+        //- Construct from list, sorted with first less-than second
         inline edge(const FixedList<label, 2>& lst, const bool doSort);
 
         //- Construct from Istream
@@ -116,16 +116,26 @@ public:
 
       // Access
 
-        //- Return start vertex label
+        //- Return first vertex label
+        using labelPair::first;
+
+        //- Return last (second) vertex label
+        using labelPair::last;
+
+        //- Return second (last) vertex label
+        using labelPair::second;
+
+
+        //- Return start (first) vertex label
         inline label start() const;
 
-        //- Return start vertex label
+        //- Return start (first) vertex label
         inline label& start();
 
-        //- Return end vertex label
+        //- Return end (last/second) vertex label
         inline label end() const;
 
-        //- Return end vertex label
+        //- Return end (last/second) vertex label
         inline label& end();
 
         //- Return reverse edge as copy.
@@ -143,10 +153,6 @@ public:
         //  No special handling of negative point labels.
         inline label maxVertex() const;
 
-        //- True if start() is less-than end()
-        //  No special handling of negative point labels.
-        inline bool sorted() const;
-
         //- Return true if point label is found in edge.
         //  Always false for a negative label.
         inline bool found(const label pointLabel) const;
@@ -175,14 +181,6 @@ public:
         //  Return the effective size after collapsing.
         inline label collapse();
 
-        //- Flip the edge in-place.
-        //  No special handling of negative point labels.
-        inline void flip();
-
-        //- Sort so that start() is less-than end()
-        //  No special handling of negative point labels.
-        inline void sort();
-
 
      // Hash-like functions
 
@@ -211,8 +209,8 @@ public:
         //  Returns true on success. Negative labels never insert.
         //  Return the number of slots filled.
         //  Similar to a HashTable::insert().
-        template<unsigned AnySize>
-        inline label insert(const FixedList<label, AnySize>& lst);
+        template<unsigned Size>
+        inline label insert(const FixedList<label, Size>& lst);
 
         //- Fill open slots with the indices if they did not previously exist.
         //  Returns true on success. Negative labels never insert.
@@ -231,8 +229,8 @@ public:
 
         //- Remove existing indices from the edge and set locations to '-1'.
         //  Returns the number of changes.
-        template<unsigned AnySize>
-        inline label erase(const FixedList<label, AnySize>& lst);
+        template<unsigned Size>
+        inline label erase(const FixedList<label, Size>& lst);
 
         //- Remove existing indices from the edge and set locations to '-1'.
         //  Returns the number of changes.
@@ -265,7 +263,7 @@ public:
      // Comparison
 
         //- Compare edges
-        //  Returns:
+        //  \return
         //  -  0: different
         //  - +1: identical values and order used
         //  - -1: identical values, but in different order
@@ -274,7 +272,14 @@ public:
 };
 
 
-// Global Operators
+// * * * * * * * * * * * * * * Global Operators  * * * * * * * * * * * * * * //
+
+//- Return reverse of an edge
+inline edge reverse(const edge& e)
+{
+    return edge(e.second(), e.first());
+}
+
 
 //- Compare edges for equal content, ignoring orientation
 inline bool operator==(const edge& a, const edge& b);
@@ -290,15 +295,15 @@ inline unsigned Hash<edge>::operator()(const edge& e, unsigned seed) const
 {
     unsigned val = seed;
 
-    if (e[0] < e[1])
+    if (e.first() < e.second())
     {
-        val = Hash<label>()(e[0], val);
-        val = Hash<label>()(e[1], val);
+        val = Hash<label>()(e.first(), val);
+        val = Hash<label>()(e.second(), val);
     }
     else
     {
-        val = Hash<label>()(e[1], val);
-        val = Hash<label>()(e[0], val);
+        val = Hash<label>()(e.second(), val);
+        val = Hash<label>()(e.first(), val);
     }
 
     return val;
@@ -313,7 +318,7 @@ inline unsigned Hash<edge>::operator()(const edge& e) const
     return Hash<edge>()(e, 0);
 }
 
-
+// Edges are a pair of labels - thus contiguous
 template<>
 inline bool contiguous<edge>()  {return true;}
 

src/OpenFOAM/meshes/meshShapes/edge/edgeI.H

@@ -24,24 +24,12 @@ License
 \*---------------------------------------------------------------------------*/
 
 #include "IOstreams.H"
-#include "Swap.H"
 
 // * * * * * * * * * * * * * Static Member Functions * * * * * * * * * * * * //
 
 inline int Foam::edge::compare(const edge& a, const edge& b)
 {
-    if (a[0] == b[0] && a[1] == b[1])
-    {
-        return 1;
-    }
-    else if (a[0] == b[1] && a[1] == b[0])
-    {
-        return -1;
-    }
-    else
-    {
-        return 0;
-    }
+    return labelPair::compare(a, b);
 }
 
 
@@ -56,7 +44,7 @@ inline Foam::label Foam::edge::insertMultiple
 {
     // Available slots.
     // Don't use count() since it has special treatment for duplicates
-    const int maxChange = (start() < 0 ? 1 : 0) + (end() < 0 ? 1 : 0);
+    const int maxChange = (first() < 0 ? 1 : 0) + (second() < 0 ? 1 : 0);
 
     int changed = 0;
     if (maxChange)
@@ -86,7 +74,7 @@ inline Foam::label Foam::edge::eraseMultiple
 {
     // Occupied slots.
     // Don't use count() since it has special treatment for duplicates
-    const int maxChange = (start() >= 0 ? 1 : 0) + (end() >= 0 ? 1 : 0);
+    const int maxChange = (first() >= 0 ? 1 : 0) + (second() >= 0 ? 1 : 0);
 
     int changed = 0;
     if (maxChange)
@@ -109,64 +97,43 @@ inline Foam::label Foam::edge::eraseMultiple
 
 inline Foam::edge::edge()
 :
-    FixedList<label, 2>(-1)
+    labelPair(-1, -1)
 {}
 
 
 inline Foam::edge::edge(const label from, const label to)
-{
-    start() = from;
-    end()   = to;
-}
-
-
-inline Foam::edge::edge(const label from, const label to, const bool doSort)
-{
-    if (doSort && from > to)
-    {
-        start() = to;
-        end()   = from;
-    }
-    else
-    {
-        start() = from;
-        end()   = to;
-    }
-}
+:
+    labelPair(from, to)
+{}
 
 
 inline Foam::edge::edge(const labelPair& pair)
-{
-    start() = pair.first();
-    end()   = pair.second();
-}
+:
+    labelPair(pair.first(), pair.second())
+{}
 
 
 inline Foam::edge::edge(const FixedList<label, 2>& lst)
-{
-    start() = lst[0];
-    end()   = lst[1];
-}
+:
+    labelPair(lst.first(), lst.last())
+{}
+
+
+inline Foam::edge::edge(const label from, const label to, const bool doSort)
+:
+    labelPair(from, to, doSort)
+{}
 
 
 inline Foam::edge::edge(const FixedList<label, 2>& lst, const bool doSort)
-{
-    if (doSort && lst[0] > lst[1])
-    {
-        start() = lst[1];
-        end()   = lst[0];
-    }
-    else
-    {
-        start() = lst[0];
-        end()   = lst[1];
-    }
-}
+:
+    labelPair(lst, doSort)
+{}
 
 
 inline Foam::edge::edge(Istream& is)
 :
-    FixedList<label, 2>(is)
+    labelPair(is)
 {}
 
 
@@ -174,42 +141,47 @@ inline Foam::edge::edge(Istream& is)
 
 inline Foam::label Foam::edge::start() const
 {
-    return operator[](0);
+    return first();
 }
 
 inline Foam::label& Foam::edge::start()
 {
-    return operator[](0);
+    return first();
 }
 
 
 inline Foam::label Foam::edge::end() const
 {
-    return operator[](1);
+    return second();
 }
 
+
 inline Foam::label& Foam::edge::end()
 {
-    return operator[](1);
+    return second();
 }
 
 
 inline Foam::label Foam::edge::minVertex() const
 {
-    return (start() < end() ? start() : end());
+    return (first() < second() ? first() : second());
 }
 
 
 inline Foam::label Foam::edge::maxVertex() const
 {
-    return (start() > end() ? start() : end());
+    return (first() > second() ? first() : second());
 }
 
 
 inline bool Foam::edge::found(const label pointLabel) const
 {
     // -1: always false
-    return (pointLabel >= 0 && (pointLabel == start() || pointLabel == end()));
+    return
+    (
+        pointLabel >= 0
+     && (pointLabel == first() || pointLabel == second())
+    );
 }
 
 
@@ -218,11 +190,11 @@ inline Foam::label Foam::edge::which(const label pointLabel) const
     // -1: always false
     if (pointLabel >= 0)
     {
-        if (pointLabel == start())
+        if (pointLabel == first())
         {
             return 0;
         }
-        if (pointLabel == end())
+        if (pointLabel == second())
         {
             return 1;
         }
@@ -233,43 +205,39 @@ inline Foam::label Foam::edge::which(const label pointLabel) const
 
 inline bool Foam::edge::connects(const edge& other) const
 {
-    return (other.found(start()) || other.found(end()));
+    return (other.found(first()) || other.found(second()));
 }
 
 
 inline Foam::label Foam::edge::commonVertex(const edge& other) const
 {
-    if (other.found(start()))
-    {
-        return start();
-    }
-    else if (other.found(end()))
+    if (other.found(first()))
     {
-        return end();
+        return first();
     }
-    else
+    if (other.found(second()))
     {
-        // No shared vertex.
-        return -1;
+        return second();
     }
+
+    // No shared vertex.
+    return -1;
 }
 
 
 inline Foam::label Foam::edge::otherVertex(const label index) const
 {
-    if (index == start())
-    {
-        return end();
-    }
-    else if (index == end())
+    if (index == first())
     {
-        return start();
+        return second();
     }
-    else
+    if (index == second())
     {
-        // The given vertex is not on the edge in the first place.
-        return -1;
+        return first();
     }
+
+    // The given vertex is not on the edge in the first place.
+    return -1;
 }
 
 
@@ -280,12 +248,12 @@ inline Foam::label Foam::edge::collapse()
     // catch any '-1' (eg, if called multiple times)
 
     label n = 2;
-    if (start() == end() || end() < 0)
+    if (first() == second() || second() < 0)
     {
-        end() = -1;
+        second() = -1;
         --n;
     }
-    if (start() < 0)
+    if (first() < 0)
     {
         --n;
     }
@@ -294,48 +262,27 @@ inline Foam::label Foam::edge::collapse()
 }
 
 
-inline bool Foam::edge::sorted() const
-{
-    return (start() < end());
-}
-
-
-inline void Foam::edge::sort()
-{
-    if (start() > end())
-    {
-        flip();
-    }
-}
-
-
-inline void Foam::edge::flip()
-{
-    Swap(operator[](0), operator[](1));
-}
-
-
 inline Foam::edge Foam::edge::reverseEdge() const
 {
-    return edge(end(), start());
+    return edge(second(), first());
 }
 
 
 inline void Foam::edge::clear()
 {
-    start() = -1;
-    end()   = -1;
+    first()  = -1;
+    second() = -1;
 }
 
 
 inline Foam::label Foam::edge::count() const
 {
     label n = 2;
-    if (start() == end() || end() < 0)
+    if (first() == second() || second() < 0)
     {
         --n;
     }
-    if (start() < 0)
+    if (first() < 0)
     {
         --n;
     }
@@ -346,7 +293,7 @@ inline Foam::label Foam::edge::count() const
 
 inline bool Foam::edge::empty() const
 {
-    return (start() < 0 && end() < 0);
+    return (first() < 0 && second() < 0);
 }
 
 
@@ -358,21 +305,21 @@ inline bool Foam::edge::insert(const label index)
         return false;
     }
 
-    if (start() < 0)
+    if (first() < 0)
     {
-        // Store at [0], if not duplicate of [1]
-        if (index != end())
+        // Store at first, if not duplicate of second
+        if (index != second())
         {
-            start() = index;
+            first() = index;
             return true;
         }
     }
-    else if (end() < 0)
+    else if (second() < 0)
     {
-        // Store at [1], if not duplicate of [0]
-        if (index != start())
+        // Store at second, if not duplicate of first
+        if (index != first())
         {
-            end() = index;
+            second() = index;
             return true;
         }
     }
@@ -387,8 +334,8 @@ inline Foam::label Foam::edge::insert(const UList<label>& lst)
 }
 
 
-template<unsigned AnySize>
-inline Foam::label Foam::edge::insert(const FixedList<label, AnySize>& lst)
+template<unsigned Size>
+inline Foam::label Foam::edge::insert(const FixedList<label, Size>& lst)
 {