ENH: Providing ITKv5 updates for C++11 #23
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Provide remove virtual and override Use clang-tidy to add ITK_OVERRIDE, and to remove redundant virtual on functions. cd ../ITK; clang-tidy -p ITK-clangtidy $find Modules/[A-J]* -name *.cxx |fgrep -v ThirdParty) -checks=-*,modernize-use-override -header-filter=.* -fix clang-tidy -p ITK-clangtidy $(find Modules/[K-Z]* -name *.cxx |fgrep -v ThirdParty) -checks=-*,modernize-use-override -header-filter=.* -fix https://stackoverflow.com/questions/39932391/virtual-override-or-both-c When you override a function you don't technically need to write either virtual or override. The original base class declaration needs the keyword virtual to mark it as virtual. In the derived class the function is virtual by way of having the ¹same type as the base class function. However, an override can help avoid bugs by producing a compilation error when the intended override isn't technically an override. E.g. that the function type isn't exactly like the base class function. Or that a maintenance of the base class changes that function's type, e.g. adding a defaulted argument. In the same way, a virtual keyword in the derived class can make such a bug more subtle, by ensuring that the function is still is virtual in further derived classes. So the general advice is, virtual for the base class function declaration. This is technically necessary. Use override (only) for a derived class' override. This helps with maintenance.
git grep -l "ITK_OVERRIDE" | fgrep -v itk_compiler_detection.h | fgrep -v CMakeLists.txt |fgrep -v .cmake | xargs sed -i '' -e "s/ITK_OVERRIDE/override/g"
git grep -l "ITK_NULLPTR" | fgrep -v itk_compiler_detection.h | fgrep -v CMakeLists.txt |fgrep -v .cmake | xargs sed -i '' -e "s/ITK_NULLPTR/nullptr/g"
The check converts the usage of null pointer constants (eg. NULL, 0) to
use the new C++11 nullptr keyword.
SRCDIR= #My local SRC
BLDDIR= #My local BLD
clang-tidy -p ${BLD} $(find Modules/[A-J]* -name "*.cxx" \|fgrep -v ThirdParty) -checks=-*,modernize-use-nullptr -header-filter=.* -fix
clang-tidy -p ${BLD} $(find Modules/[K-Z]* -name "*.cxx" \|fgrep -v ThirdParty) -checks=-*,modernize-use-nullptr -header-filter=.* -fix
Some headers from C library were deprecated in C++ and are no longer welcome in C++ codebases. Some have no effect in C++. For more details refer to the C++ 14 Standard [depr.c.headers] section. This patch replaces C standard library headers with their C++ alternatives and removes redundant ones.
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@thewtex Matt The circle CI needs updating for several of the remote modules. Should we ignore this for now, or do you have time to fix it?
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We should have ITK working well before putting time into updating the CI builds. |
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@thewtex Agreed. so ignoring for now. |
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This pull request incorporates code changes
that happened in parallel with updating the
core ITK code to ITKv5.