[clang-tools-extra] [clang-tidy] Add new check bugprone-tagged-union-member-count (PR #89925)
Congcong Cai via cfe-commits
cfe-commits at lists.llvm.org
Thu Sep 19 07:39:53 PDT 2024
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In-Reply-To: <llvm.org/llvm/llvm-project/pull/89925 at github.com>
================
@@ -0,0 +1,186 @@
+//===--- TaggedUnionMemberCountCheck.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 "TaggedUnionMemberCountCheck.h"
+#include "../utils/OptionsUtils.h"
+#include "clang/ASTMatchers/ASTMatchFinder.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/SmallSet.h"
+
+using namespace clang::ast_matchers;
+
+namespace clang::tidy::bugprone {
+
+static constexpr llvm::StringLiteral StrictModeOptionName = "StrictMode";
+static constexpr llvm::StringLiteral EnableCountingEnumHeuristicOptionName =
+ "EnableCountingEnumHeuristic";
+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_P2(RecordDecl, fieldCountOfKindIsGT,
+ ast_matchers::internal::Matcher<FieldDecl>, InnerMatcher,
+ unsigned, N) {
+ unsigned MatchCount = 0;
+ for (const auto Field : Node.fields()) {
+ if (InnerMatcher.matches(*Field, Finder, Builder)) {
+ MatchCount += 1;
+ }
+ }
----------------
HerrCai0907 wrote:
`llvm::count_if` can simplify logic.
Or at least remove the brace since there is only one statement here.
https://github.com/llvm/llvm-project/pull/89925
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