From 93417346b6795a4e51556be58a8fdccefc615650 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jon=20Haitz=20Legarreta=20Gorro=C3=B1o?=
 <jon.haitz.legarreta@gmail.com>
Date: Fri, 12 Feb 2021 17:27:29 -0500
Subject: [PATCH] ENH: Add RTTI information to `Common` operator classes

Add run-time type information (RTTI) to `Common` operator classes.
---
 Modules/Core/Common/include/itkBackwardDifferenceOperator.h | 4 +++-
 Modules/Core/Common/include/itkDerivativeOperator.h         | 3 +++
 Modules/Core/Common/include/itkForwardDifferenceOperator.h  | 3 +++
 Modules/Core/Common/include/itkLaplacianOperator.h          | 3 +++
 4 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/Modules/Core/Common/include/itkBackwardDifferenceOperator.h b/Modules/Core/Common/include/itkBackwardDifferenceOperator.h
index f4bc4a365ae..bf2bcc4d427 100644
--- a/Modules/Core/Common/include/itkBackwardDifferenceOperator.h
+++ b/Modules/Core/Common/include/itkBackwardDifferenceOperator.h
@@ -52,7 +52,9 @@ class ITK_TEMPLATE_EXPORT BackwardDifferenceOperator : public NeighborhoodOperat
   using Self = BackwardDifferenceOperator;
   using Superclass = NeighborhoodOperator<TPixel, TDimension, TAllocator>;
 
-  /** From Superclass */
+  /** Run-time type information (and related methods). */
+  itkTypeMacro(BackwardDifferenceOperator, NeighborhoodOperator);
+
   using PixelType = typename Superclass::PixelType;
 
 protected:
diff --git a/Modules/Core/Common/include/itkDerivativeOperator.h b/Modules/Core/Common/include/itkDerivativeOperator.h
index 1d13309eb37..a0e714774bf 100644
--- a/Modules/Core/Common/include/itkDerivativeOperator.h
+++ b/Modules/Core/Common/include/itkDerivativeOperator.h
@@ -73,6 +73,9 @@ class ITK_TEMPLATE_EXPORT DerivativeOperator : public NeighborhoodOperator<TPixe
   using Self = DerivativeOperator;
   using Superclass = NeighborhoodOperator<TPixel, VDimension, TAllocator>;
 
+  /** Run-time type information (and related methods). */
+  itkTypeMacro(DerivativeOperator, NeighborhoodOperator);
+
   using PixelType = TPixel;
   using PixelRealType = typename Superclass::PixelRealType;
 
diff --git a/Modules/Core/Common/include/itkForwardDifferenceOperator.h b/Modules/Core/Common/include/itkForwardDifferenceOperator.h
index b15daa00568..e0a23558225 100644
--- a/Modules/Core/Common/include/itkForwardDifferenceOperator.h
+++ b/Modules/Core/Common/include/itkForwardDifferenceOperator.h
@@ -51,6 +51,9 @@ class ITK_TEMPLATE_EXPORT ForwardDifferenceOperator : public NeighborhoodOperato
   using Self = ForwardDifferenceOperator;
   using Superclass = NeighborhoodOperator<TPixel, VDimension, TAllocator>;
 
+  /** Run-time type information (and related methods). */
+  itkTypeMacro(ForwardDifferenceOperator, NeighborhoodOperator);
+
   using PixelType = typename Superclass::PixelType;
 
 protected:
diff --git a/Modules/Core/Common/include/itkLaplacianOperator.h b/Modules/Core/Common/include/itkLaplacianOperator.h
index d6a3549547e..25b063f6dd9 100644
--- a/Modules/Core/Common/include/itkLaplacianOperator.h
+++ b/Modules/Core/Common/include/itkLaplacianOperator.h
@@ -71,6 +71,9 @@ class ITK_TEMPLATE_EXPORT LaplacianOperator : public NeighborhoodOperator<TPixel
   using Self = LaplacianOperator;
   using Superclass = NeighborhoodOperator<TPixel, VDimension, TAllocator>;
 
+  /** Run-time type information (and related methods). */
+  itkTypeMacro(LaplacianOperator, NeighborhoodOperator);
+
   using PixelType = TPixel;
   using SizeType = typename Superclass::SizeType;