ENH: disable ensightWrite, vtkWrite function objects in post-process mode

- prevents accidental overwrite of runtime conversions.

src/functionObjects/utilities/ensightWrite/ensightWrite.C

@@ -85,6 +85,15 @@ Foam::functionObjects::ensightWrite::ensightWrite
     dirName_("ensightWrite"),
     consecutive_(false)
 {
+    if (postProcess)
+    {
+        // Disable for post-process mode.
+        // Emit as FatalError for the try/catch in the caller.
+        FatalError
+            << type() << " disabled in post-process mode"
+            << exit(FatalError);
+    }
+
     read(dict);
 }
 

src/functionObjects/utilities/vtkWrite/vtkWrite.C

@@ -56,6 +56,15 @@ Foam::functionObjects::vtkWrite::vtkWrite
     selectFields_(),
     dirName_("VTK")
 {
+    if (postProcess)
+    {
+        // Disable for post-process mode.
+        // Emit as FatalError for the try/catch in the caller.
+        FatalError
+            << type() << " disabled in post-process mode"
+            << exit(FatalError);
+    }
+
     read(dict);
 }
 

tutorials/incompressible/simpleFoam/windAroundBuildings/system/controlDict

@@ -50,6 +50,7 @@ runTimeModifiable true;
 
 functions
 {
+    #include "ensightWrite"
     #include "vtkWrite"
 }
 

tutorials/incompressible/simpleFoam/windAroundBuildings/system/ensightWrite

@@ -0,0 +1,18 @@
+// -*- C++ -*-
+// Minimal example of using the ensight write function object.
+// Many more options possible
+ensightWrite
+{
+    type    ensightWrite;
+    libs    ("libutilityFunctionObjects.so");
+    log     true;
+
+    // Fields to output (words or regex)
+    fields  (U p "(k|epsilon|omega)");
+
+    //- Write more frequent than fields
+    writeControl    timeStep;
+    writeInterval   5;
+}
+
+// ************************************************************************* //