[clang-tools-extra] [clang-tidy] Add new check bugprone-tagged-union-member-count (PR #89925)

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In-Reply-To: <llvm.org/llvm/llvm-project/pull/89925 at github.com>


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@@ -16,39 +16,74 @@ using namespace clang::ast_matchers;
 
 namespace clang::tidy::bugprone {
 
-const char StrictModeOptionName[] = "StrictMode";
-const char EnableCountingEnumHeuristicOptionName[] =
+static constexpr llvm::StringLiteral StrictModeOptionName = "StrictMode";
+static constexpr llvm::StringLiteral EnableCountingEnumHeuristicOptionName =
     "EnableCountingEnumHeuristic";
-const char CountingEnumPrefixesOptionName[] = "CountingEnumPrefixes";
-const char CountingEnumSuffixesOptionName[] = "CountingEnumSuffixes";
+static constexpr llvm::StringLiteral CountingEnumPrefixesOptionName =
+    "CountingEnumPrefixes";
+static constexpr llvm::StringLiteral CountingEnumSuffixesOptionName =
+    "CountingEnumSuffixes";
+
+static constexpr bool StrictModeOptionDefaultValue = false;
+static constexpr bool EnableCountingEnumHeuristicOptionDefaultValue = true;
+static constexpr llvm::StringLiteral CountingEnumPrefixesOptionDefaultValue =
+    "";
+static constexpr llvm::StringLiteral CountingEnumSuffixesOptionDefaultValue =
+    "count";
+
+static constexpr llvm::StringLiteral RootMatchBindName = "root";
+static constexpr llvm::StringLiteral UnionMatchBindName = "union";
+static constexpr llvm::StringLiteral TagMatchBindName = "tags";
+
+namespace {
+AST_MATCHER(FieldDecl, isUnion) {
+  const Type *T = Node.getType().getCanonicalType().getTypePtr();
+  assert(T);
+  return T->isUnionType();
+}
+
+AST_MATCHER(FieldDecl, isEnum) {
+  const Type *T = Node.getType().getCanonicalType().getTypePtr();
+  assert(T);
+  return T->isEnumeralType();
+}
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tigbr wrote:

I was able to remove these AST_MATCHER macros by using the matchers that @whisperity has suggested.

https://github.com/llvm/llvm-project/pull/89925