ENH: Deprecate (FUTURE REMOVE) CoordRepType in favor of CoordinateType

Deprecated using `CoordRepType`, as was suggested by Dženan Zukić.
N-Dekker · Nov 27, 2024 · 836d2a6 · 836d2a6
1 parent 9ca009c
commit 836d2a6
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Showing 44 changed files with 180 additions and 45 deletions.
diff --git a/Modules/Core/Common/include/itkBoundingBox.h b/Modules/Core/Common/include/itkBoundingBox.h
@@ -90,7 +90,10 @@ class ITK_TEMPLATE_EXPORT BoundingBox : public Object
   /** Hold on to the type information specified by the template parameters. */
   using PointIdentifier = TPointIdentifier;
   using CoordinateType = TCoordinate;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   using PointsContainer = TPointsContainer;
   using PointsContainerPointer = typename PointsContainer::Pointer;
   using PointsContainerConstPointer = typename PointsContainer::ConstPointer;

diff --git a/Modules/Core/Common/include/itkCellInterface.h b/Modules/Core/Common/include/itkCellInterface.h
@@ -110,7 +110,10 @@ class ITK_TEMPLATE_EXPORT CellInterface
 
   /** Save type information for this cell. */
   using CoordinateType = typename CellTraits::CoordinateType;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   using InterpolationWeightType = typename CellTraits::InterpolationWeightType;
   using PointIdentifier = typename CellTraits::PointIdentifier;
   using PointIdIterator = typename CellTraits::PointIdIterator;
@@ -527,7 +530,10 @@ class ITK_TEMPLATE_EXPORT CellTraitsInfo
 public:
   static constexpr unsigned int PointDimension = VPointDimension;
   using CoordinateType = TCoordinate;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   using InterpolationWeightType = TInterpolationWeight;
   using PointIdentifier = TPointIdentifier;
   using CellIdentifier = TCellIdentifier;

diff --git a/Modules/Core/Common/include/itkContinuousIndex.h b/Modules/Core/Common/include/itkContinuousIndex.h
@@ -57,7 +57,10 @@ class ITK_TEMPLATE_EXPORT ContinuousIndex : public Point<TCoordinate, VIndexDime
    * as a data element held in an Point.   */
   using ValueType = TCoordinate;
   using CoordinateType = TCoordinate;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
 
   /** Dimension of the Space */
   static constexpr unsigned int IndexDimension = VIndexDimension;

diff --git a/Modules/Core/Common/include/itkDefaultDynamicMeshTraits.h b/Modules/Core/Common/include/itkDefaultDynamicMeshTraits.h
@@ -70,7 +70,10 @@ class DefaultDynamicMeshTraits
   using PixelType = TPixelType;
   using CellPixelType = TCellPixelType;
   using CoordinateType = TCoordinate;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   using InterpolationWeightType = TInterpolationWeight;
 
   /** Just save all the template parameters. */

diff --git a/Modules/Core/Common/include/itkDefaultStaticMeshTraits.h b/Modules/Core/Common/include/itkDefaultStaticMeshTraits.h
@@ -68,7 +68,10 @@ class ITK_TEMPLATE_EXPORT DefaultStaticMeshTraits
   using PixelType = TPixelType;
   using CellPixelType = TCellPixelType;
   using CoordinateType = TCoordinate;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   using InterpolationWeightType = TInterpolationWeight;
 
   /** Just save all the template parameters. */

diff --git a/Modules/Core/Common/include/itkPoint.h b/Modules/Core/Common/include/itkPoint.h
@@ -61,7 +61,10 @@ class ITK_TEMPLATE_EXPORT Point : public FixedArray<TCoordinate, VPointDimension
    * as a data element held in an Point.   */
   using ValueType = TCoordinate;
   using CoordinateType = TCoordinate;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
 
   using RealType = typename NumericTraits<ValueType>::RealType;
 

diff --git a/Modules/Core/Common/include/itkPointSetBase.h b/Modules/Core/Common/include/itkPointSetBase.h
@@ -72,7 +72,10 @@ class ITK_TEMPLATE_EXPORT PointSetBase : public DataObject
   /** Convenient type alias obtained from TPointsContainer template parameter. */
   using PointType = typename TPointsContainer::Element;
   using CoordinateType = typename PointType::CoordinateType;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   using PointIdentifier = typename TPointsContainer::ElementIdentifier;
   using PointsContainer = TPointsContainer;
 

diff --git a/Modules/Core/Common/include/itkTriangleHelper.h b/Modules/Core/Common/include/itkTriangleHelper.h
@@ -34,7 +34,10 @@ class ITK_TEMPLATE_EXPORT TriangleHelper
   using Self = TriangleHelper;
   using PointType = TPoint;
   using CoordinateType = typename PointType::CoordinateType;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   using VectorType = typename PointType::VectorType;
   using CrossVectorType = CrossHelper<VectorType>;
 

diff --git a/Modules/Core/ImageFunction/include/itkImageFunction.h b/Modules/Core/ImageFunction/include/itkImageFunction.h
@@ -85,7 +85,10 @@ class ITK_TEMPLATE_EXPORT ImageFunction : public FunctionBase<Point<TCoordinate,
 
   /** CoordinateType type alias support */
   using CoordinateType = TCoordinate;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
 
   /** Index Type. */
   using IndexType = typename InputImageType::IndexType;

diff --git a/Modules/Core/ImageFunction/include/itkVectorInterpolateImageFunction.h b/Modules/Core/ImageFunction/include/itkVectorInterpolateImageFunction.h
@@ -87,7 +87,10 @@ class ITK_TEMPLATE_EXPORT VectorInterpolateImageFunction
 
   /** CoordRep type alias support */
   using CoordinateType = TCoordinate;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
 
   /** Returns the interpolated image intensity at a
    * specified point position. No bounds checking is done.

diff --git a/Modules/Core/Mesh/include/itkInteriorExteriorMeshFilter.h b/Modules/Core/Mesh/include/itkInteriorExteriorMeshFilter.h
@@ -63,7 +63,10 @@ class ITK_TEMPLATE_EXPORT InteriorExteriorMeshFilter : public MeshToMeshFilter<T
 
   /** Type for representing coordinates. */
   using CoordinateType = typename TInputMesh::CoordinateType;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
 
   /** Type of the  transform. */
   using SpatialFunctionType = TSpatialFunction;

diff --git a/Modules/Core/Mesh/include/itkMesh.h b/Modules/Core/Mesh/include/itkMesh.h
@@ -169,7 +169,10 @@ class ITK_TEMPLATE_EXPORT Mesh : public PointSet<TPixelType, VDimension, TMeshTr
 
   /** Convenient type alias obtained from TMeshTraits template parameter. */
   using CoordinateType = typename MeshTraits::CoordinateType;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   using InterpolationWeightType = typename MeshTraits::InterpolationWeightType;
   using PointIdentifier = typename MeshTraits::PointIdentifier;
   using CellIdentifier = typename MeshTraits::CellIdentifier;

diff --git a/Modules/Core/Mesh/include/itkParametricSpaceToImageSpaceMeshFilter.h b/Modules/Core/Mesh/include/itkParametricSpaceToImageSpaceMeshFilter.h
@@ -57,7 +57,10 @@ class ITK_TEMPLATE_EXPORT ParametricSpaceToImageSpaceMeshFilter : public MeshToM
 
   /** Type for representing coordinates. */
   using CoordinateType = typename TInputMesh::CoordinateType;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
 
   using InputMeshType = TInputMesh;
   using OutputMeshType = TOutputMesh;

diff --git a/Modules/Core/Mesh/include/itkTransformMeshFilter.h b/Modules/Core/Mesh/include/itkTransformMeshFilter.h
@@ -57,7 +57,10 @@ class ITK_TEMPLATE_EXPORT TransformMeshFilter : public MeshToMeshFilter<TInputMe
 
   /** Type for representing coordinates. */
   using CoordinateType = typename TInputMesh::CoordinateType;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
 
   /** Type of the transform. */
   using TransformType = TTransform;

diff --git a/Modules/Core/Mesh/include/itkWarpMeshFilter.h b/Modules/Core/Mesh/include/itkWarpMeshFilter.h
@@ -58,7 +58,10 @@ class ITK_TEMPLATE_EXPORT WarpMeshFilter : public MeshToMeshFilter<TInputMesh, T
 
   /** Type for representing coordinates. */
   using CoordinateType = typename TInputMesh::CoordinateType;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
 
   /** Deformation field type alias support */
   using DisplacementFieldType = TDisplacementField;

diff --git a/Modules/Core/QuadEdgeMesh/include/itkQuadEdgeCellTraitsInfo.h b/Modules/Core/QuadEdgeMesh/include/itkQuadEdgeCellTraitsInfo.h
@@ -51,7 +51,10 @@ class QuadEdgeMeshCellTraitsInfo
 public:
   static constexpr unsigned int PointDimension = VPointDimension;
   using CoordinateType = TCoordinate;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   using InterpolationWeightType = TInterpolationWeight;
   using PointIdentifier = TPointIdentifier;
   using CellIdentifier = TCellIdentifier;

diff --git a/Modules/Core/QuadEdgeMesh/include/itkQuadEdgeMeshEulerOperatorCreateCenterVertexFunction.h b/Modules/Core/QuadEdgeMesh/include/itkQuadEdgeMeshEulerOperatorCreateCenterVertexFunction.h
@@ -55,7 +55,10 @@ class ITK_TEMPLATE_EXPORT QuadEdgeMeshEulerOperatorCreateCenterVertexFunction
   using PointIdentifier = typename MeshType::PointIdentifier;
   using PointType = typename MeshType::PointType;
   using CoordinateType = typename MeshType::CoordinateType;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   using VectorType = typename MeshType::VectorType;
 
   /** Evaluate at the specified input position */

diff --git a/Modules/Core/QuadEdgeMesh/include/itkQuadEdgeMeshEulerOperatorsTestHelper.h b/Modules/Core/QuadEdgeMesh/include/itkQuadEdgeMeshEulerOperatorsTestHelper.h
@@ -50,7 +50,10 @@ GeneratePointCoordinates(const unsigned int iN)
 {
   using PointType = typename TMesh::PointType;
   using CoordinateType = typename PointType::CoordinateType;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   std::vector<PointType> oPt(iN * iN);
 
   for (unsigned int i = 0; i < iN; ++i)

diff --git a/Modules/Core/QuadEdgeMesh/include/itkQuadEdgeMeshExtendedTraits.h b/Modules/Core/QuadEdgeMesh/include/itkQuadEdgeMeshExtendedTraits.h
@@ -71,7 +71,10 @@ class QuadEdgeMeshExtendedTraits
   using Self = QuadEdgeMeshExtendedTraits;
   /** Save the template parameters. */
   using CoordinateType = TCoordinate;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   using PixelType = TPixelType;
   using PrimalDataType = TPData;
   using DualDataType = TDData;

diff --git a/Modules/Core/QuadEdgeMesh/include/itkQuadEdgeMeshFrontIterator.h b/Modules/Core/QuadEdgeMesh/include/itkQuadEdgeMeshFrontIterator.h
@@ -85,7 +85,10 @@ class ITK_TEMPLATE_EXPORT QuadEdgeMeshFrontBaseIterator
 protected:
   // Mesh types
   using CoordinateType = typename MeshType::CoordinateType;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   // QE types
   using QEOriginType = typename QEType::OriginRefType;
 

diff --git a/Modules/Core/QuadEdgeMesh/include/itkQuadEdgeMeshTraits.h b/Modules/Core/QuadEdgeMesh/include/itkQuadEdgeMeshTraits.h
@@ -54,7 +54,10 @@ class QuadEdgeMeshTraits
   using PixelType = TPixel;
   using CellPixelType = TPixel;
   using CoordinateType = TCoordinate;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   using InterpolationWeightType = TInterpolationWeight;
 
   static constexpr unsigned int PointDimension = VPointDimension;

diff --git a/Modules/Filtering/ImageGrid/include/itkBSplineControlPointImageFunction.h b/Modules/Filtering/ImageGrid/include/itkBSplineControlPointImageFunction.h
@@ -79,7 +79,10 @@ class ITK_TEMPLATE_EXPORT BSplineControlPointImageFunction
   using ControlPointLatticeType = TInputImage;
   using InputImageType = TInputImage;
   using CoordinateType = TCoordinate;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   using PixelType = typename InputImageType::PixelType;
   using RegionType = typename InputImageType::RegionType;
   using IndexType = typename InputImageType::IndexType;

diff --git a/Modules/Filtering/ImageGrid/include/itkExpandImageFilter.h b/Modules/Filtering/ImageGrid/include/itkExpandImageFilter.h
@@ -93,7 +93,10 @@ class ITK_TEMPLATE_EXPORT ExpandImageFilter : public ImageToImageFilter<TInputIm
 
   /** Typedef support for the interpolation function. */
   using CoordinateType = double;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   using InterpolatorType = InterpolateImageFunction<InputImageType, CoordinateType>;
   using InterpolatorPointer = typename InterpolatorType::Pointer;
   using DefaultInterpolatorType = LinearInterpolateImageFunction<InputImageType, CoordinateType>;

diff --git a/Modules/Filtering/ImageGrid/include/itkWarpImageFilter.h b/Modules/Filtering/ImageGrid/include/itkWarpImageFilter.h
@@ -129,7 +129,10 @@ class ITK_TEMPLATE_EXPORT WarpImageFilter : public ImageToImageFilter<TInputImag
 
   /** Interpolator type alias support */
   using CoordinateType = double;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   using InterpolatorType = InterpolateImageFunction<InputImageType, CoordinateType>;
   using InterpolatorPointer = typename InterpolatorType::Pointer;
   using DefaultInterpolatorType = LinearInterpolateImageFunction<InputImageType, CoordinateType>;

diff --git a/Modules/Filtering/ImageGrid/include/itkWarpVectorImageFilter.h b/Modules/Filtering/ImageGrid/include/itkWarpVectorImageFilter.h
@@ -132,7 +132,10 @@ class ITK_TEMPLATE_EXPORT WarpVectorImageFilter : public ImageToImageFilter<TInp
 
   /** Interpolator type alias support */
   using CoordinateType = double;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   using InterpolatorType = VectorInterpolateImageFunction<InputImageType, CoordinateType>;
   using InterpolatorPointer = typename InterpolatorType::Pointer;
   using DefaultInterpolatorType = VectorLinearInterpolateImageFunction<InputImageType, CoordinateType>;

diff --git a/Modules/Filtering/ImageIntensity/include/itkVectorExpandImageFilter.h b/Modules/Filtering/ImageIntensity/include/itkVectorExpandImageFilter.h
@@ -118,7 +118,10 @@ class ITK_TEMPLATE_EXPORT VectorExpandImageFilter : public ImageToImageFilter<TI
 
   /** Typedef support for the interpolation function */
   using CoordinateType = double;
-  using CoordRepType = CoordinateType;
+#  ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#  endif
   using InterpolatorType = VectorInterpolateImageFunction<InputImageType, CoordinateType>;
   using InterpolatorPointer = typename InterpolatorType::Pointer;
   using DefaultInterpolatorType = VectorLinearInterpolateImageFunction<InputImageType, CoordinateType>;

diff --git a/Modules/Nonunit/Review/include/itkConformalFlatteningMeshFilter.h b/Modules/Nonunit/Review/include/itkConformalFlatteningMeshFilter.h
@@ -68,7 +68,10 @@ class ITK_TEMPLATE_EXPORT ConformalFlatteningMeshFilter : public MeshToMeshFilte
   /** Type for representing coordinates. */
   // using CoordinateType = typename TInputMesh::CoordinateType;
   using CoordinateType = double;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
 
   /** Method for creation through the object factory. */
   itkNewMacro(Self);

diff --git a/Modules/Registration/Common/include/itkMeanSquareRegistrationFunction.h b/Modules/Registration/Common/include/itkMeanSquareRegistrationFunction.h
@@ -96,7 +96,10 @@ class ITK_TEMPLATE_EXPORT MeanSquareRegistrationFunction
 
   /** Interpolator type. */
   using CoordinateType = double;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   using InterpolatorType = InterpolateImageFunction<MovingImageType, CoordinateType>;
   using InterpolatorPointer = typename InterpolatorType::Pointer;
   using PointType = typename InterpolatorType::PointType;

diff --git a/Modules/Registration/FEM/include/itkFEMRegistrationFilter.h b/Modules/Registration/FEM/include/itkFEMRegistrationFilter.h
@@ -191,7 +191,10 @@ class ITK_TEMPLATE_EXPORT FEMRegistrationFilter : public ImageToImageFilter<TMov
 
   /** Typedef support for the interpolation function */
   using CoordinateType = double;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   using InterpolatorType = VectorInterpolateImageFunction<FieldType, CoordinateType>;
   using InterpolatorPointer = typename InterpolatorType::Pointer;
 

diff --git a/Modules/Registration/FEM/include/itkMIRegistrationFunction.h b/Modules/Registration/FEM/include/itkMIRegistrationFunction.h
@@ -95,7 +95,10 @@ class ITK_TEMPLATE_EXPORT MIRegistrationFunction
 
   /** Interpolator type. */
   using CoordinateType = double;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   using InterpolatorType = InterpolateImageFunction<MovingImageType, CoordinateType>;
   using InterpolatorPointer = typename InterpolatorType::Pointer;
   using PointType = typename InterpolatorType::PointType;

diff --git a/Modules/Registration/FEM/include/itkNCCRegistrationFunction.h b/Modules/Registration/FEM/include/itkNCCRegistrationFunction.h
@@ -96,7 +96,10 @@ class ITK_TEMPLATE_EXPORT NCCRegistrationFunction
 
   /** Interpolator type. */
   using CoordinateType = double;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   using InterpolatorType = InterpolateImageFunction<MovingImageType, CoordinateType>;
 
   using InterpolatorPointer = typename InterpolatorType::Pointer;

diff --git a/Modules/Registration/GPUPDEDeformable/include/itkGPUDemonsRegistrationFunction.h b/Modules/Registration/GPUPDEDeformable/include/itkGPUDemonsRegistrationFunction.h
@@ -99,7 +99,10 @@ class ITK_TEMPLATE_EXPORT GPUDemonsRegistrationFunction
 
   /** Interpolator type. */
   using CoordinateType = double;
-  using CoordRepType = CoordinateType;
+#ifndef ITK_FUTURE_LEGACY_REMOVE
+  using CoordRepType [[deprecated("ITK 6 discourages using `CoordRepType`. Please use `CoordinateType` instead!")]] =
+    CoordinateType;
+#endif
   using InterpolatorType = InterpolateImageFunction<MovingImageType, CoordinateType>;
   using InterpolatorPointer = typename InterpolatorType::Pointer;
   using PointType = typename InterpolatorType::PointType;