[clang-tools-extra] Add check 'modernize-use-enum-class' (PR #138282)

[Baranov Victor via cfe-commits]

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@@ -0,0 +1,26 @@
+.. title:: clang-tidy - modernize-use-enum-class
+
+modernize-use-enum-class
+=============================
+
+Scoped enums (enum class) should be preferred over unscoped enums:
+https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#Renum-class
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vbvictor wrote:

Or even it's better to write like in other core guidelines checks:
"This check implements \`Enum.4
<https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#Renum-class>\`_
from the C++ Core Guidelines."

for reference https://clang.llvm.org/extra/clang-tidy/checks/cppcoreguidelines/prefer-member-initializer.html

https://github.com/llvm/llvm-project/pull/138282