From 5a36e0f233674f62ca8b9071a859c6188bd3bf9e Mon Sep 17 00:00:00 2001
From: Niels Dekker <N.Dekker@lumc.nl>
Date: Sat, 20 Jan 2024 13:57:17 +0100
Subject: [PATCH] COMP: Work around Clang error: 'MaskType' is not a class,
 namespace, ...

Worked around Clang errors at https://my.cdash.org/viewBuildError.php?buildid=2475511, saying:

> itkImageGridSampler.hxx:473:23: error: 'MaskType' is not a class, namespace, or enumeration
---
 Common/ImageSamplers/itkImageGridSampler.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Common/ImageSamplers/itkImageGridSampler.h b/Common/ImageSamplers/itkImageGridSampler.h
index f738a3bec..46e63a87a 100644
--- a/Common/ImageSamplers/itkImageGridSampler.h
+++ b/Common/ImageSamplers/itkImageGridSampler.h
@@ -70,7 +70,10 @@ class ITK_TEMPLATE_EXPORT ImageGridSampler : public ImageSamplerBase<TInputImage
   using typename Superclass::ImageSampleType;
   using typename Superclass::ImageSampleContainerType;
   using typename Superclass::ImageSampleContainerPointer;
-  using typename Superclass::MaskType;
+
+  // Clang/macos-12/Xcode_14.2 does not like `using typename Superclass::MaskType`, saying "error: 'MaskType' is not a
+  // class, namespace, or enumeration"
+  using MaskType = typename Superclass::MaskType;
 
   /** The input image dimension. */
   itkStaticConstMacro(InputImageDimension, unsigned int, Superclass::InputImageDimension);