================
@@ -0,0 +1,34 @@
+//===--- UseEnumClassCheck.cpp - clang-tidy
-------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM
Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "UseEnumClassCheck.h"
+#include "clang/ASTMatchers/ASTMatchFinder.h"
+
+using namespace clang::ast_matchers;
+
+namespace clang::tidy::modernize {
+
+void UseEnumClassCheck::registerMatchers(MatchFinder *Finder) {
+ Finder->addMatcher(
+ traverse(TK_AsIs,
+ enumDecl(unless(isScoped()), unless(hasParent(recordDecl()))))
+ .bind("unscoped_enum"),
+ this);
+}
+
+void UseEnumClassCheck::check(const MatchFinder::MatchResult &Result) {
+ const auto *UnscopedEnum = Result.Nodes.getNodeAs<EnumDecl>("unscoped_enum");
+
+ diag(UnscopedEnum->getLocation(),
+ "enum %0 is unscoped, use enum class instead")
+ << UnscopedEnum;
+ diag(UnscopedEnum->getLocation(), "insert 'class'", DiagnosticIDs::Note)
+ << FixItHint::CreateInsertion(UnscopedEnum->getLocation(), "class ");
----------------
vbvictor wrote:
If we want to support fix-its I think we should at least try to convert all
previous usages of enum values to use `::`.
E.g.
```cpp
enum A {
a
};
int main() {
A a_c = a;
}
```
Transformed to
```cpp
enum class A { // new 'class' fixit!
a
};
int main() {
A a_c = A::a; // new 'A::' fixit!
}
```
https://github.com/llvm/llvm-project/pull/138282
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