STYLE: Replace itkStaticConstMacro with static constexpr

Use static constexpr directly now that C++11 conformance
is required by all compilers.

:%s/itkStaticConstMacro *( *\([^,]*\),[ \_s]*\([^,]*\),\_s*\([^)]*\)) */static constexpr \2 \1 = \3/ge

Author: hjmjohnson

include/itkArrivalFunctionToPathFilter.h

@@ -168,8 +168,7 @@ class ITK_EXPORT ArrivalFunctionToPathFilter :
   typedef typename OutputPathType::ConstPointer   OutputPathConstPointer;
 
   /** ImageDimension constants. */
-  itkStaticConstMacro(InputImageDimension, unsigned int,
-                      InputImageType::ImageDimension);
+  static constexpr unsigned int InputImageDimension = InputImageType::ImageDimension;
 
   /** Some convenient typedefs. */
   typedef Index< InputImageDimension >                   IndexType;

include/itkPhysicalCentralDifferenceImageFunction.h

@@ -48,8 +48,7 @@ class ITK_EXPORT PhysicalCentralDifferenceImageFunction :
 {
 public:
   /** Dimension underlying input image. */
-  itkStaticConstMacro(ImageDimension, unsigned int,
-                      TInputImage::ImageDimension);
+  static constexpr unsigned int ImageDimension = TInputImage::ImageDimension;
 
   /** Standard class typedefs. */
   typedef PhysicalCentralDifferenceImageFunction Self;

include/itkSingleImageCostFunction.h

@@ -83,7 +83,7 @@ class ITK_EXPORT SingleImageCostFunction :
   typedef typename ImageType::ConstPointer ImageConstPointer;
 
   /** Constant for the image dimension */
-  itkStaticConstMacro(ImageDimension, unsigned int, ImageType::ImageDimension);
+  static constexpr unsigned int ImageDimension = ImageType::ImageDimension;
 
   /** Type used for representing point components */
   typedef Superclass::ParametersValueType CoordRepType;

include/itkSpeedFunctionToPathFilter.h

@@ -80,8 +80,7 @@ class ITK_EXPORT SpeedFunctionToPathFilter :
   itkNewMacro(Self);
 
   /** ImageDimension constants */
-  itkStaticConstMacro(InputImageDimension, unsigned int,
-                      TInputImage::ImageDimension);
+  static constexpr unsigned int InputImageDimension = TInputImage::ImageDimension;
 
   /** Some image typedefs. */
   typedef TInputImage                             InputImageType;