Revert "[libc++] Clang-tidy enable modernize-use-nullptr. (#76659)" (#78409) This reverts commit 020ea3e8d1075ab4a388ecd0d6e7a9d4cd415392. This seems to break `test/libcxx/clang_tidy.gen.py/regex.sh.cpp` (in C++03 mode for some reason): ``` 2024-01-17T07:32:22.1759374Z # RUN: at line 12 2024-01-17T07:32:22.1773919Z clang-tidy-18 /home/runner/_work/llvm-project/llvm-project/build/generic-cxx03/test/libcxx/clang_tidy.gen.py/regex.sh.cpp --warnings-as-errors=* -header-filter=.* --config-file=/home/runner/_work/llvm-project/llvm-project/libcxx/.clang-tidy -- -Wweak-vtables -nostdinc++ -I /home/runner/_work/llvm-project/llvm-project/build/generic-cxx03/include/c++/v1 -I /home/runner/_work/llvm-project/llvm-project/build/generic-cxx03/include/c++/v1 -I /home/runner/_work/llvm-project/llvm-project/libcxx/test/support -std=c++03 -Werror -Wall -Wctad-maybe-unsupported -Wextra -Wshadow -Wundef -Wunused-template -Wno-unused-command-line-argument -Wno-attributes -Wno-pessimizing-move -Wno-noexcept-type -Wno-atomic-alignment -Wno-reserved-module-identifier -Wdeprecated-copy -Wdeprecated-copy-dtor -Wno-user-defined-literals -Wno-tautological-compare -Wsign-compare -Wunused-variable -Wunused-parameter -Wunreachable-code -Wno-unused-local-typedef -Wno-local-type-template-args -Wno-c++11-extensions -Wno-unknown-pragmas -Wno-pass-failed -Wno-mismatched-new-delete -Wno-redundant-move -Wno-self-move -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D_LIBCPP_ENABLE_EXPERIMENTAL -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_NONE -Werror=thread-safety -Wuser-defined-warnings -fno-modules 2024-01-17T07:32:22.1803227Z # executed command: clang-tidy-18 /home/runner/_work/llvm-project/llvm-project/build/generic-cxx03/test/libcxx/clang_tidy.gen.py/regex.sh.cpp '--warnings-as-errors=*' '-header-filter=.*' --config-file=/home/runner/_work/llvm-project/llvm-project/libcxx/.clang-tidy -- -Wweak-vtables -nostdinc++ -I /home/runner/_work/llvm-project/llvm-project/build/generic-cxx03/include/c++/v1 -I /home/runner/_work/llvm-project/llvm-project/build/generic-cxx03/include/c++/v1 -I /home/runner/_work/llvm-project/llvm-project/libcxx/test/support -std=c++03 -Werror -Wall -Wctad-maybe-unsupported -Wextra -Wshadow -Wundef -Wunused-template -Wno-unused-command-line-argument -Wno-attributes -Wno-pessimizing-move -Wno-noexcept-type -Wno-atomic-alignment -Wno-reserved-module-identifier -Wdeprecated-copy -Wdeprecated-copy-dtor -Wno-user-defined-literals -Wno-tautological-compare -Wsign-compare -Wunused-variable -Wunused-parameter -Wunreachable-code -Wno-unused-local-typedef -Wno-local-type-template-args -Wno-c++11-extensions -Wno-unknown-pragmas -Wno-pass-failed -Wno-mismatched-new-delete -Wno-redundant-move -Wno-self-move -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER -D_LIBCPP_ENABLE_EXPERIMENTAL -D_LIBCPP_HARDENING_MODE=_LIBCPP_HARDENING_MODE_NONE -Werror=thread-safety -Wuser-defined-warnings -fno-modules 2024-01-17T07:32:22.1817757Z # .---command stdout------------ 2024-01-17T07:32:22.1820160Z # | /home/runner/_work/llvm-project/llvm-project/build/generic-cxx03/include/c++/v1/__iterator/iterator_traits.h:124:50: error: use nullptr [modernize-use-nullptr,-warnings-as-errors] 2024-01-17T07:32:22.1822498Z # | 124 | static const bool value = decltype(__test<_Tp>(0, 0, 0, 0, 0))::value; 2024-01-17T07:32:22.1823337Z # | | ^ 2024-01-17T07:32:22.1824052Z # | | nullptr 2024-01-17T07:32:22.1826651Z # | /home/runner/_work/llvm-project/llvm-project/build/generic-cxx03/include/c++/v1/__iterator/iterator_traits.h:124:53: error: use nullptr [modernize-use-nullptr,-warnings-as-errors] 2024-01-17T07:32:22.1829325Z # | 124 | static const bool value = decltype(__test<_Tp>(0, 0, 0, 0, 0))::value; 2024-01-17T07:32:22.1831137Z # | | ^ 2024-01-17T07:32:22.1831963Z # | | nullptr 2024-01-17T07:32:22.1834149Z # | /home/runner/_work/llvm-project/llvm-project/build/generic-cxx03/include/c++/v1/__iterator/iterator_traits.h:124:56: error: use nullptr [modernize-use-nullptr,-warnings-as-errors] 2024-01-17T07:32:22.1848711Z # | 124 | static const bool value = decltype(__test<_Tp>(0, 0, 0, 0, 0))::value; 2024-01-17T07:32:22.1849506Z # | | ^ 2024-01-17T07:32:22.1849997Z # | | nullptr 2024-01-17T07:32:22.1851528Z # | /home/runner/_work/llvm-project/llvm-project/build/generic-cxx03/include/c++/v1/__iterator/iterator_traits.h:124:59: error: use nullptr [modernize-use-nullptr,-warnings-as-errors] 2024-01-17T07:32:22.1853391Z # | 124 | static const bool value = decltype(__test<_Tp>(0, 0, 0, 0, 0))::value; 2024-01-17T07:32:22.1854277Z # | | ^ 2024-01-17T07:32:22.1854841Z # | | nullptr 2024-01-17T07:32:22.1856314Z # | /home/runner/_work/llvm-project/llvm-project/build/generic-cxx03/include/c++/v1/__iterator/iterator_traits.h:124:62: error: use nullptr [modernize-use-nullptr,-warnings-as-errors] 2024-01-17T07:32:22.1857768Z # | 124 | static const bool value = decltype(__test<_Tp>(0, 0, 0, 0, 0))::value; 2024-01-17T07:32:22.1858493Z # | | ^ 2024-01-17T07:32:22.1858998Z # | | nullptr 2024-01-17T07:32:22.1859503Z # `----------------------------- 2024-01-17T07:32:22.1859900Z # .---command stderr------------ 2024-01-17T07:32:22.1860259Z # | 43 warnings generated. 2024-01-17T07:32:22.1860710Z # | Suppressed 33 warnings (33 in non-user code). 2024-01-17T07:32:22.1861809Z # | Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well. 2024-01-17T07:32:22.1862750Z # | 5 warnings treated as errors 2024-01-17T07:32:22.1863229Z # `----------------------------- 2024-01-17T07:32:22.1863622Z # error: command failed with exit status: 1 ``` (see https://github.com/llvm/llvm-project/actions/runs/7552394884/job/20561192096)
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