ENH: add FixedList templated get<unsigned>() methods

- provides fast compile-time indexing for FixedList
  (invalid indices trigger a compiler error).

  This enables noexcept access, which can propagate into various
  other uses (eg, triFace, triPoints, ...)

ENH: add triangle edge vectors

applications/test/FixedList/Test-FixedList.C

@@ -189,6 +189,12 @@ int main(int argc, char *argv[])
             << " hash:" << FixedList<label, 4>::hasher()(list1) << nl
             << " hash:" << Hash<FixedList<label, 4>>()(list1) << nl;
 
+        Info<< "get<0>: " << list1.get<0>() << nl;
+        Info<< "get<1>: " << list1.get<1>() << nl;
+        Info<< "get<2>: " << list1.get<2>() << nl;
+        Info<< "get<3>: " << list1.get<3>() << nl;
+// Will not compile:  Info<< "get<4>: " << list1.get<4>() << nl;
+
         label a[4] = {0, 1, 2, 3};
         FixedList<label, 4> list2(a);
 

applications/test/boolVector/Test-boolVector.C

@@ -5,7 +5,7 @@
     \\  /    A nd           | www.openfoam.com
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
-    Copyright (C) 2020 OpenCFD Ltd.
+    Copyright (C) 2020-2022 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -43,7 +43,7 @@ void print(const boolVector& v)
         << " any:" << Switch::name(v.any())
         << " all:" << Switch::name(v.all())
         << " none:" << Switch::name(v.none())
-        << " count:" << v.count() << nl;
+        << " on:" << v.count() << " off:" << v.count(false) << nl;
 }
 
 
@@ -68,7 +68,7 @@ int main(int argc, char *argv[])
     Info<< nl;
 
     {
-        boolVector vec{1, 0, 1};
+        boolVector vec(1, 0, 1);
         print(vec);
 
         vec.flip();

applications/test/faces/Test-faces.C

@@ -5,7 +5,7 @@
     \\  /    A nd           | www.openfoam.com
      \\/     M anipulation  |
 -------------------------------------------------------------------------------
-    Copyright (C) 2016-2021 OpenCFD Ltd.
+    Copyright (C) 2016-2022 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -33,6 +33,7 @@ Description
 
 #include "argList.H"
 #include "labelledTri.H"
+#include "edge.H"
 #include "faceList.H"
 #include "triFaceList.H"
 #include "pointList.H"
@@ -131,10 +132,25 @@ int main(int argc, char *argv[])
     testSign(f1, points2, testPoints);
     Info<< nl;
 
-    triFace t1({1, 2, 3});
+    // Initializer list
+    // triFace t1({1, 2, 3});
+
+    // Component-wise
+    {
+        edge e1(3, 2, 1);  // Inadvertent sort!!!
+        Info<< "edge:" << e1 << nl;
+    }
+
+    // Component-wise
+    triFace t1(1, 2, 3);
     Info<< "triFace:"; faceInfo(t1, points1); Info << nl;
     testSign(t1, points1, testPoints);
 
+    {
+        scalarField fld({0, 20, 20, 30});
+        Info<< "avg:" << t1.average(pointField::null(), fld) << nl;
+    }
+
     Info<< "triFace:"; faceInfo(t1, points2); Info << nl;
     testSign(t1, points2, testPoints);
     Info<< nl;

applications/test/triTet/Test-triTet.C

@@ -1,3 +1,4 @@
+#include "argList.H"
 #include "point.H"
 #include "triangle.H"
 #include "tetrahedron.H"
@@ -5,7 +6,7 @@
 
 using namespace Foam;
 
-int main()
+int main(int argc, char *argv[])
 {
     triangle<point, point> tri
     (
@@ -14,6 +15,12 @@ int main()
         vector(1, 1, 0)
     );
 
+    Info<< "triangle: " << tri << nl
+        << "  vecA: " << tri.vecA() << nl
+        << "  vecB: " << tri.vecB() << nl
+        << "  vecC: " << tri.vecC() << nl
+        << endl;
+
     Info<< "tri circumCentre = " << tri.circumCentre() << endl;
     Info<< "tri circumRadius = " << tri.circumRadius() << endl;
 
@@ -28,6 +35,8 @@ int main()
     Info<< "tet circumCentre = " << tet.circumCentre() << endl;
     Info<< "tet circumRadius = " << tet.circumRadius() << endl;
 
+    InfoErr<< "Enter four points: " << endl;
+
     vector a(Sin);
     vector b(Sin);
     vector c(Sin);
@@ -36,5 +45,6 @@ int main()
     Info<< "tet circumRadius = "
         << tetrahedron<point, point>(a, b, c, d).circumRadius() << endl;
 
+    Info<< "\nEnd\n";
     return 0;
 }