STYLE: Prefer c++11 'using' to 'typedef'

The check converts the usage of typedef with using keyword.

SRCDIR= #My local SRC
BLDDIR= #My local BLD

cd
run-clang-tidy.py -extra-arg=-D__clang__ -checks=-*,modernize-use-using  -header-filter=.* -fix
# https://clang.llvm.org/extra/clang-tidy/checks/modernize-use-using.html

Author: hjmjohnson

src/Compatibility/Deprecated/ResampleITKVectorImage/Code.cxx

@@ -22,7 +22,7 @@
 int
 main(int, char *[])
 {
-  typedef itk::VectorImage<double, 2> VectorImageType;
+  using VectorImageType = itk::VectorImage<double, 2>;
 
   VectorImageType::Pointer image = VectorImageType::New();
   itk::Index<2>            start;
@@ -37,8 +37,8 @@ main(int, char *[])
   image->Allocate();
   // image->FillBuffer(itk::NumericTraits<VectorImageType::InternalPixelType>::Zero);
 
-  typedef itk::ResampleImageFilter<VectorImageType, VectorImageType> ResampleFilterType;
-  ResampleFilterType::Pointer                                        vectorResampleFilter = ResampleFilterType::New();
+  using ResampleFilterType = itk::ResampleImageFilter<VectorImageType, VectorImageType>;
+  ResampleFilterType::Pointer vectorResampleFilter = ResampleFilterType::New();
   vectorResampleFilter->SetInput(image);
   vectorResampleFilter->Update();
 

src/Compatibility/Deprecated/ResampleRGBImage/Code.cxx

@@ -26,7 +26,7 @@
 #  include "QuickView.h"
 #endif
 
-typedef itk::Image<itk::RGBPixel<unsigned char>, 2> ImageType;
+using ImageType = itk::Image<itk::RGBPixel<unsigned char>, 2>;
 
 static void
 CreateImage(ImageType::Pointer image);
@@ -45,8 +45,8 @@ main(int argc, char * argv[])
   }
   else
   {
-    typedef itk::ImageFileReader<ImageType> ReaderType;
-    ReaderType::Pointer                     reader = ReaderType::New();
+    using ReaderType = itk::ImageFileReader<ImageType>;
+    ReaderType::Pointer reader = ReaderType::New();
     reader->SetFileName(argv[1]);
     reader->Update();
     input = reader->GetOutput();
@@ -69,16 +69,16 @@ main(int argc, char * argv[])
   outputSpacing[0] = input->GetSpacing()[0] * (static_cast<double>(inputSize[0]) / static_cast<double>(outputSize[0]));
   outputSpacing[1] = input->GetSpacing()[1] * (static_cast<double>(inputSize[1]) / static_cast<double>(outputSize[1]));
 
-  typedef itk::IdentityTransform<double, 2>                    TransformType;
-  typedef itk::VectorResampleImageFilter<ImageType, ImageType> ResampleImageFilterType;
-  ResampleImageFilterType::Pointer                             resample = ResampleImageFilterType::New();
+  using TransformType = itk::IdentityTransform<double, 2>;
+  using ResampleImageFilterType = itk::VectorResampleImageFilter<ImageType, ImageType>;
+  ResampleImageFilterType::Pointer resample = ResampleImageFilterType::New();
   resample->SetInput(input);
   resample->SetSize(outputSize);
   resample->SetOutputSpacing(outputSpacing);
   resample->SetTransform(TransformType::New());
   resample->UpdateLargestPossibleRegion();
 
-  typedef itk::VectorNearestNeighborInterpolateImageFunction<ImageType, double> NearestInterpolatorType;
+  using NearestInterpolatorType = itk::VectorNearestNeighborInterpolateImageFunction<ImageType, double>;
   NearestInterpolatorType::Pointer nnInterpolator = NearestInterpolatorType::New();
 
   ResampleImageFilterType::Pointer resampleNN = ResampleImageFilterType::New();

src/Core/Transform/TranslateAVectorImage/Code.cxx

@@ -25,8 +25,8 @@
 int
 main(int, char *[])
 {
-  typedef itk::CovariantVector<double, 3> VectorType;
-  typedef itk::Image<VectorType, 2>       VectorImageType;
+  using VectorType = itk::CovariantVector<double, 3>;
+  using VectorImageType = itk::Image<VectorType, 2>;
 
   VectorImageType::Pointer image = VectorImageType::New();
   itk::Index<2>            start;
@@ -46,8 +46,8 @@ main(int, char *[])
   translation[1] = 20;
   transform->Translate(translation);
 
-  typedef itk::ResampleImageFilter<VectorImageType, VectorImageType> ResampleFilterType;
-  ResampleFilterType::Pointer                                        vectorResampleFilter = ResampleFilterType::New();
+  using ResampleFilterType = itk::ResampleImageFilter<VectorImageType, VectorImageType>;
+  ResampleFilterType::Pointer vectorResampleFilter = ResampleFilterType::New();
   vectorResampleFilter->SetInput(image);
   vectorResampleFilter->SetSize(image->GetLargestPossibleRegion().GetSize());
   vectorResampleFilter->SetTransform(transform);