Replace fallthrough comments with new SAL_FALLTHROUGH macro

...which (in LIBO_INTERNAL_ONLY) for Clang expands to [[clang::fallthrough]] in
preparation of enabling -Wimplicit-fallthrough.  (This is only relevant for
C++11, as neither C nor old C++ has a way to annotate intended fallthroughs.)

Could use BOOST_FALLTHROUGH instead of introducing our own SAL_FALLTHROUGH, but
that would require adding back in dependencies on boost_headers to many
libraries where we carefully removed any remaining Boost dependencies only
recently.  (At least make SAL_FALLTHROUGH strictly LIBO_INTERNAL_ONLY, so its
future evolution will not have any impact on the stable URE interface.)  C++17
will have a proper [[fallthroug]], eventually removing the need for a macro
altogether.

(cherry picked from commit 14cd5182c5f64c43581c82db8c958369152226ac)

Change-Id: I342a7610a107db7d7a344ea9cbddfd9714d7e9ca

5 files changed, 25 insertions, 6 deletions

diff --git a/oox/source/drawingml/color.cxx b/oox/source/drawingml/color.cxx
index e92713ba1b91..35d18df6a3f2 100644
--- a/oox/source/drawingml/color.cxx
+++ b/oox/source/drawingml/color.cxx
@@ -695,7 +695,7 @@ void Color::toCrgb() const
     {
         case COLOR_HSL:
             toRgb();
-            // run through!
+            SAL_FALLTHROUGH;
         case COLOR_RGB:
             meMode = COLOR_CRGB;
             mnC1 = lclGamma( lclRgbCompToCrgbComp( mnC1 ), DEC_GAMMA );
@@ -716,7 +716,7 @@ void Color::toHsl() const
     {
         case COLOR_CRGB:
             toRgb();
-            // run through!
+            SAL_FALLTHROUGH;
         case COLOR_RGB:
         {
             meMode = COLOR_HSL;
diff --git a/oox/source/drawingml/customshapegeometry.cxx b/oox/source/drawingml/customshapegeometry.cxx
index 88aa8a72961f..3210528c81ba 100644
--- a/oox/source/drawingml/customshapegeometry.cxx
+++ b/oox/source/drawingml/customshapegeometry.cxx
@@ -223,18 +223,24 @@ static EnhancedCustomShapeParameter GetAdjCoordinate( CustomShapeProperties& rCu
             }
             break;
 
-            case XML_hd10 :   // !!PASSTHROUGH INTENDED
+            case XML_hd10 :
                 nIntVal += 2; // */ h 1.0 10.0
+                SAL_FALLTHROUGH;
             case XML_hd8 :    // */ h 1.0 8.0
                 nIntVal += 2;
+                SAL_FALLTHROUGH;
             case XML_hd6 :    // */ h 1.0 6.0
                 nIntVal++;
+                SAL_FALLTHROUGH;
             case XML_hd5 :    // */ h 1.0 5.0
                 nIntVal++;
+                SAL_FALLTHROUGH;
             case XML_hd4 :    // */ h 1.0 4.0
                 nIntVal++;
+                SAL_FALLTHROUGH;
             case XML_hd3 :    // */ h 1.0 3.0
                 nIntVal++;
+                SAL_FALLTHROUGH;
             case XML_hd2 :    // */ h 1.0 2.0
             case XML_vc :     // */ h 1.0 2.0
             {
@@ -279,14 +285,19 @@ static EnhancedCustomShapeParameter GetAdjCoordinate( CustomShapeProperties& rCu
             break;
             case XML_ssd32 : // */ ss 1.0 32.0
                 nIntVal += 16;
+                SAL_FALLTHROUGH;
             case XML_ssd16 : // */ ss 1.0 16.0
                 nIntVal += 8;
+                SAL_FALLTHROUGH;
             case XML_ssd8 :  // */ ss 1.0 8.0
                 nIntVal += 2;
+                SAL_FALLTHROUGH;
             case XML_ssd6 :  // */ ss 1.0 6.0
                 nIntVal += 2;
+                SAL_FALLTHROUGH;
             case XML_ssd4 :  // */ ss 1.0 4.0
                 nIntVal += 2;
+                SAL_FALLTHROUGH;
             case XML_ssd2 :  // */ ss 1.0 2.0
             {
                 nIntVal += 2;
@@ -319,20 +330,28 @@ static EnhancedCustomShapeParameter GetAdjCoordinate( CustomShapeProperties& rCu
 
             case XML_wd32 : // */ w 1.0 32.0
                 nIntVal += 20;
+                SAL_FALLTHROUGH;
             case XML_wd12 : // */ w 1.0 12.0
                 nIntVal += 2;
+                SAL_FALLTHROUGH;
             case XML_wd10 : // */ w 1.0 10.0
                 nIntVal += 2;
+                SAL_FALLTHROUGH;
             case XML_wd8 :  // */ w 1.0 8.0
                 nIntVal += 2;
+                SAL_FALLTHROUGH;
             case XML_wd6 :  // */ w 1.0 6.0
                 nIntVal++;
+                SAL_FALLTHROUGH;
             case XML_wd5 :  // */ w 1.0 5.0
                 nIntVal++;
+                SAL_FALLTHROUGH;
             case XML_wd4 :  // */ w 1.0 4.0
                 nIntVal++;
+                SAL_FALLTHROUGH;
             case XML_wd3 :  // */ w 1.0 3.0
                 nIntVal++;
+                SAL_FALLTHROUGH;
             case XML_hc :   // */ w 1.0 2.0
             case XML_wd2 :  // */ w 1.0 2.0
             {
diff --git a/oox/source/export/drawingml.cxx b/oox/source/export/drawingml.cxx
index a23314350c1f..319b791f7cd4 100644
--- a/oox/source/export/drawingml.cxx
+++ b/oox/source/export/drawingml.cxx
@@ -632,7 +632,7 @@ void DrawingML::WriteOutline( Reference<XPropertySet> rXPropSet )
                 SAL_INFO("oox.shape", "dash dots: " << aLineDash.Dots << " dashes: " << aLineDash.Dashes
                         << " dotlen: " << aLineDash.DotLen << " dashlen: " << aLineDash.DashLen <<  " distance: " <<  aLineDash.Distance);
             }
-            /* fallthru intended */
+            SAL_FALLTHROUGH;
         case drawing::LineStyle_SOLID:
         default:
             if ( GETA( LineColor ) )
diff --git a/oox/source/ole/axcontrol.cxx b/oox/source/ole/axcontrol.cxx
index 18a700e2b163..602b86e5f6a7 100644
--- a/oox/source/ole/axcontrol.cxx
+++ b/oox/source/ole/axcontrol.cxx
@@ -398,7 +398,7 @@ void ControlConverter::convertAxBackground( PropertyMap& rPropMap,
         break;
         case API_TRANSPARENCY_PAINTTRANSPARENT:
             rPropMap.setProperty( PROP_PaintTransparent, !bOpaque );
-            // run-through intended!
+            SAL_FALLTHROUGH;
         case API_TRANSPARENCY_VOID:
             // keep transparency by leaving the (void) default property value
             if( bOpaque )
diff --git a/oox/source/vml/vmlformatting.cxx b/oox/source/vml/vmlformatting.cxx
index 1d1dedbe0b65..491bb322533d 100644
--- a/oox/source/vml/vmlformatting.cxx
+++ b/oox/source/vml/vmlformatting.cxx
@@ -781,7 +781,7 @@ void FillModel::pushToPropMap( ShapePropertyMap& rPropMap, const GraphicHelper&
                     }
                 }
             }
-            // run-through to XML_solid in case of missing bitmap path intended!
+            SAL_FALLTHROUGH; // to XML_solid in case of missing bitmap path intended!
 
             case XML_solid:
             default: