topoSet with faceSetToZone

Functionality to add/problem to solve

I would like to be able to do:

    {
        name    intFaceZone;
        type    faceZoneSet;
        action  new;
        source  boundaryToFace;
    }
    {
        name    intFaceZone;
        type    faceZoneSet;
        action  invert;
    }

but this gives

Created faceZoneSet intFaceZone
    Applying source boundaryToFace
    Adding all boundary faces ...
--> FOAM Warning : 
    From virtual void Foam::faceZoneSet::sync(const Foam::polyMesh &)
    in file sets/topoSets/faceZoneSet.C at line 331
    Detected 6880 faces that are in the faceZone but not in the faceSet or vice versa. The faceZoneSet should only be manipulated using setsToFaceZone or setToFaceZone
    faceZoneSet intFaceZone now size 0
Read set faceZoneSet intFaceZone with size 0
    Inverting faceZoneSet
    faceZoneSet intFaceZone now size 22640

@mark @Prashant

added feature label

changed the description

mentioned in commit 25551b23

Above fixes:

• decent error message if using a non-existing faceZone (before was crashing with negative index)
• possible to set faceZones using faceSets (and assuming flipMap not set) e.g.

actions
(
    {
        name    f0;
        type    faceZoneSet;
        action  new;
        source  labelToFace;
        value   (0);
    }
);

mentioned in commit 613959c5

closed via merge request !695 (merged)

mentioned in commit be01ca78