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

[Julian Schmidt via cfe-commits]

=?utf-8?b?R8OhYm9yIFTDs3RodsOhcmk=?= <tigbrcode at protonmail.com>,
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Message-ID:
In-Reply-To: <llvm.org/llvm/llvm-project/pull/89925 at github.com>


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@@ -0,0 +1,182 @@
+//===--- 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 {
+
+TaggedUnionMemberCountCheck::TaggedUnionMemberCountCheck(
+    StringRef Name, ClangTidyContext *Context)
+    : ClangTidyCheck(Name, Context),
+      StrictModeIsEnabled(Options.get(StrictModeIsEnabledOptionName, true)),
+      CountingEnumHeuristicIsEnabled(
+          Options.get(CountingEnumHeuristicIsEnabledOptionName, true)),
+      RawCountingEnumPrefixes(Options.get(CountingEnumPrefixesOptionName, "")),
+      RawCountingEnumSuffixes(
+          Options.get(CountingEnumSuffixesOptionName, "count")),
+      ParsedCountingEnumPrefixes(
+          utils::options::parseStringList(RawCountingEnumPrefixes)),
+      ParsedCountingEnumSuffixes(
+          utils::options::parseStringList(RawCountingEnumSuffixes)) {}
+
+void TaggedUnionMemberCountCheck::storeOptions(
+    ClangTidyOptions::OptionMap &Opts) {
+  Options.store(Opts, StrictModeIsEnabledOptionName, StrictModeIsEnabled);
+  Options.store(Opts, CountingEnumHeuristicIsEnabledOptionName,
+                CountingEnumHeuristicIsEnabled);
+  Options.store(Opts, CountingEnumPrefixesOptionName, RawCountingEnumPrefixes);
+  Options.store(Opts, CountingEnumSuffixesOptionName, RawCountingEnumSuffixes);
+}
+
+void TaggedUnionMemberCountCheck::registerMatchers(MatchFinder *Finder) {
+  Finder->addMatcher(
+      recordDecl(
+          allOf(anyOf(isStruct(), isClass()),
----------------
5chmidti wrote:

All arguments passed to `recordDecl` are already behaving as if they were passed to an `allOf` matcher, so you can remove the `allOf`.

`recordDecl(foo(), bar())` has the same meaning as `recordDecl(allOf(foo(), bar()))`

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