STYLE: Remove redundant typename in type aliases

Refactor code to remove redundant `typename` specifiers in type aliases
where unnecessary. Simplifies type definitions for improved readability
and consistency while adhering to modern C++ practices.

'typename; is redundant before non-dependent names as of c++17

Author: hjmjohnson

Examples/Filtering/SpatialObjectToImage1.cxx

@@ -186,9 +186,9 @@ main(int argc, char * argv[])
   // Software Guide : BeginCodeSnippet
   ellipse->SetRadiusInObjectSpace(size[0] * 0.2 * spacing[0]);
 
-  typename TubeType::PointType         point;
-  typename TubeType::TubePointType     tubePoint;
-  typename TubeType::TubePointListType tubePointList;
+  TubeType::PointType         point;
+  TubeType::TubePointType     tubePoint;
+  TubeType::TubePointListType tubePointList;
   point[0] = size[0] * 0.2 * spacing[0];
   point[1] = size[1] * 0.2 * spacing[1];
   point[2] = size[2] * 0.2 * spacing[2];

Examples/Filtering/SpatialObjectToImage3.cxx

@@ -142,21 +142,21 @@ main(int argc, char * argv[])
   //  Software Guide : EndLatex
 
   // Software Guide : BeginCodeSnippet
-  constexpr unsigned int                      numberOfPoints = 6;
-  typename PolygonType::PointType             point;
-  typename PolygonType::PointType::VectorType radial;
+  constexpr unsigned int             numberOfPoints = 6;
+  PolygonType::PointType             point;
+  PolygonType::PointType::VectorType radial;
   radial[0] = 0.0;
   radial[1] = 0.0;
   radial[2] = 0.0;
 
-  typename PolygonType::PointType center;
+  PolygonType::PointType center;
   center[0] = 50.0;
   center[1] = 50.0;
   center[2] = 0.0;
 
   constexpr double radius = 40.0;
 
-  typename PolygonType::PolygonPointType polygonPoint;
+  PolygonType::PolygonPointType polygonPoint;
 
   for (unsigned int i = 0; i < numberOfPoints; ++i)
   {

Modules/Core/Common/include/itkAnatomicalOrientation.h

@@ -54,7 +54,7 @@ class ITKCommon_EXPORT AnatomicalOrientation
 {
 public:
   static constexpr unsigned int Dimension = 3;
-  using DirectionType = typename ImageBase<Dimension>::DirectionType;
+  using DirectionType = ImageBase<Dimension>::DirectionType;
   static constexpr unsigned int ImageDimension = Dimension;
 
 #ifndef ITK_FUTURE_LEGACY_REMOVE
@@ -563,16 +563,16 @@ class ITKCommon_EXPORT AnatomicalOrientation
 
 /** Outputs unambiguous anatomical orientation names such as "right-to-left". */
 ITKCommon_EXPORT std::ostream &
-                 operator<<(std::ostream & out, typename AnatomicalOrientation::CoordinateEnum value);
+                 operator<<(std::ostream & out, AnatomicalOrientation::CoordinateEnum value);
 
 /** Outputs the PositiveEnum encoding as a string such as "LPS". */
 ITKCommon_EXPORT std::ostream &
-                 operator<<(std::ostream & out, typename AnatomicalOrientation::PositiveEnum value);
+                 operator<<(std::ostream & out, AnatomicalOrientation::PositiveEnum value);
 
 
 /** Outputs the NegativeEnum encoding as a string such as "RAI" */
 ITKCommon_EXPORT std::ostream &
-                 operator<<(std::ostream & out, typename AnatomicalOrientation::NegativeEnum value);
+                 operator<<(std::ostream & out, AnatomicalOrientation::NegativeEnum value);
 
 ITKCommon_EXPORT std::ostream &
                  operator<<(std::ostream & out, const AnatomicalOrientation & orientation);

Modules/Core/Common/include/itkCompensatedSummation.hxx

@@ -142,7 +142,7 @@ CompensatedSummation<TFloat>::GetSum() const -> const AccumulateType &
 
 
 template <typename TFloat>
-CompensatedSummation<TFloat>::operator typename CompensatedSummation<TFloat>::FloatType() const
+CompensatedSummation<TFloat>::operator FloatType() const
 {
   return this->m_Sum;
 }

Modules/Core/Common/include/itkFloodFilledFunctionConditionalConstIterator.h

@@ -52,7 +52,7 @@ class ITK_TEMPLATE_EXPORT FloodFilledFunctionConditionalConstIterator : public C
   using IndexType = typename TImage::IndexType;
 
   /** Index ContainerType */
-  using SeedsContainerType = typename std::vector<IndexType>;
+  using SeedsContainerType = std::vector<IndexType>;
 
   /** Size type alias support. */
   using SizeType = typename TImage::SizeType;

Modules/Core/Common/include/itkFloodFilledFunctionConditionalConstIterator.hxx

@@ -105,7 +105,7 @@ void
 FloodFilledFunctionConditionalConstIterator<TImage, TFunction>::FindSeedPixel()
 {
   // Create an iterator that will walk the input image
-  using IRIType = typename itk::ImageRegionConstIterator<TImage>;
+  using IRIType = itk::ImageRegionConstIterator<TImage>;
 
   // Now we search the input image for the first pixel which is inside
   // the function of interest

Modules/Core/Common/include/itkImageDuplicator.hxx

@@ -64,8 +64,7 @@ ImageDuplicator<TInputImage>::PrintSelf(std::ostream & os, Indent indent) const
   itkPrintSelfObjectMacro(InputImage);
   itkPrintSelfObjectMacro(DuplicateImage);
 
-  os << indent
-     << "InternalImageTime: " << static_cast<typename NumericTraits<ModifiedTimeType>::PrintType>(m_InternalImageTime)
+  os << indent << "InternalImageTime: " << static_cast<NumericTraits<ModifiedTimeType>::PrintType>(m_InternalImageTime)
      << std::endl;
 }
 } // end namespace itk

Modules/Core/Common/include/itkImageRandomConstIteratorWithIndex.h

@@ -230,7 +230,7 @@ class ITK_TEMPLATE_EXPORT ImageRandomConstIteratorWithIndex : public ImageConstI
   void
   RandomJump();
 
-  using GeneratorPointer = typename Statistics::MersenneTwisterRandomVariateGenerator::Pointer;
+  using GeneratorPointer = Statistics::MersenneTwisterRandomVariateGenerator::Pointer;
   GeneratorPointer m_Generator{ Statistics::MersenneTwisterRandomVariateGenerator::New() };
   SizeValueType    m_NumberOfSamplesRequested{};
   SizeValueType    m_NumberOfSamplesDone{};

Modules/Core/Common/include/itkImageRandomConstIteratorWithOnlyIndex.h

@@ -232,7 +232,7 @@ class ITK_TEMPLATE_EXPORT ImageRandomConstIteratorWithOnlyIndex : public ImageCo
   void
   RandomJump();
 
-  using GeneratorPointer = typename Statistics::MersenneTwisterRandomVariateGenerator::Pointer;
+  using GeneratorPointer = Statistics::MersenneTwisterRandomVariateGenerator::Pointer;
   GeneratorPointer m_Generator{ Statistics::MersenneTwisterRandomVariateGenerator::New() };
   SizeValueType    m_NumberOfSamplesRequested{};
   SizeValueType    m_NumberOfSamplesDone{};

Modules/Core/Common/include/itkImageRandomNonRepeatingConstIteratorWithIndex.h

@@ -65,7 +65,7 @@ class NodeOfPermutation
 class RandomPermutation
 {
 public:
-  using GeneratorPointer = typename Statistics::MersenneTwisterRandomVariateGenerator::Pointer;
+  using GeneratorPointer = Statistics::MersenneTwisterRandomVariateGenerator::Pointer;
   NodeOfPermutation * m_Permutation;
   GeneratorPointer    m_Generator;
   SizeValueType       m_Size;