ENH: Add const smart pointer type alias

Add `const` smart pointer type alias to classes.

Author: jhlegarreta

src/Developer/ImageFilter.h

@@ -14,6 +14,7 @@ class ImageFilter : public ImageToImageFilter<TImage, TImage>
   using Self = ImageFilter;
   using Superclass = ImageToImageFilter<TImage, TImage>;
   using Pointer = SmartPointer<Self>;
+  using ConstPointer = SmartPointer<const Self>;
 
   /** Method for creation through the object factory. */
   itkNewMacro(Self);

src/Developer/ImageFilterMultipleInputsDifferentType.h

@@ -15,6 +15,7 @@ class ImageFilterMultipleInputsDifferentType : public ImageToImageFilter<TImage,
   using Self = ImageFilterMultipleInputsDifferentType;
   using Superclass = ImageToImageFilter<TImage, TImage>;
   using Pointer = SmartPointer<Self>;
+  using ConstPointer = SmartPointer<const Self>;
 
   /** Method for creation through the object factory. */
   itkNewMacro(Self);

src/Developer/ImageFilterMultipleOutputs.h

@@ -14,6 +14,7 @@ class ImageFilterMultipleOutputs : public ImageToImageFilter<TImage, TImage>
   using Self = ImageFilterMultipleOutputs;
   using Superclass = ImageToImageFilter<TImage, TImage>;
   using Pointer = SmartPointer<Self>;
+  using ConstPointer = SmartPointer<const Self>;
 
   /** Method for creation through the object factory. */
   itkNewMacro(Self);

src/Developer/ImageFilterMultipleOutputsDifferentType.h

@@ -17,6 +17,7 @@ class ImageFilterMultipleOutputsDifferentType
   using Self = ImageFilterMultipleOutputsDifferentType;
   using Superclass = ImageToImageFilter<TInputImage, TOutputImage1>;
   using Pointer = SmartPointer<Self>;
+  using ConstPointer = SmartPointer<const Self>;
 
   /** Method for creation through the object factory. */
   itkNewMacro(Self);

src/Developer/ImageFilterX.h

@@ -15,6 +15,7 @@ class ImageFilter : public ImageToImageFilter<TImage, TImage>
   using Self = ImageFilter;
   using Superclass = ImageToImageFilter<TImage, TImage>;
   using Pointer = SmartPointer<Self>;
+  using ConstPointer = SmartPointer<const Self>;
 
   /** Method for creation through the object factory. */
   itkNewMacro(Self);

src/Developer/ImageFilterY.h

@@ -17,6 +17,7 @@ class ImageFilter : public ImageToImageFilter<TImage, TImage>
   using Self = ImageFilter;
   using Superclass = ImageToImageFilter<TImage, TImage>;
   using Pointer = SmartPointer<Self>;
+  using ConstPointer = SmartPointer<const Self>;
 
   /** Method for creation through the object factory. */
   itkNewMacro(Self);

src/Developer/ImageSource.h

@@ -17,6 +17,7 @@ class ImageSource : public ProcessObject
   using Self = ImageSource;
   using Superclass = ProcessObject;
   using Pointer = SmartPointer<Self>;
+  using ConstPointer = SmartPointer<const Self>;
 
   /** Method for creation through the object factory. */
   itkNewMacro(Self);

src/Developer/MultiThreadedImageFilter.h

@@ -15,6 +15,7 @@ class MultiThreadedImageFilter : public ImageToImageFilter<TImage, TImage>
   using Self = MultiThreadedImageFilter;
   using Superclass = ImageToImageFilter<TImage, TImage>;
   using Pointer = SmartPointer<Self>;
+  using ConstPointer = SmartPointer<const Self>;
 
   using OutputImageRegionType = typename Superclass::OutputImageRegionType;
 

src/Developer/MyInPlaceImageFilter.h

@@ -14,6 +14,7 @@ class MyInPlaceImageFilter : public InPlaceImageFilter<TImage>
   using Self = MyInPlaceImageFilter;
   using Superclass = InPlaceImageFilter<TImage>;
   using Pointer = SmartPointer<Self>;
+  using ConstPointer = SmartPointer<const Self>;
 
   /** Method for creation through the object factory. */
   itkNewMacro(Self);

src/Developer/itkImageFilterMultipleInputs.h

@@ -14,6 +14,7 @@ class ImageFilterMultipleInputs : public ImageToImageFilter<TImage, TImage>
   using Self = ImageFilterMultipleInputs;
   using Superclass = ImageToImageFilter<TImage, TImage>;
   using Pointer = SmartPointer<Self>;
+  using ConstPointer = SmartPointer<const Self>;
 
   /** Method for creation through the object factory. */
   itkNewMacro(Self);