1 files changed, 69 insertions, 0 deletions
diff --git a/compilerplugins/clang/store/deadclass.cxx b/compilerplugins/clang/store/deadclass.cxx
new file mode 100644
index 0000000000..f055d6de28
--- /dev/null
+++ b/compilerplugins/clang/store/deadclass.cxx
@@ -0,0 +1,69 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include "plugin.hxx"
+
+namespace {
+
+class DeadClass:
+    public loplugin::FilteringPlugin<DeadClass>
+{
+public:
+    explicit DeadClass(InstantiationData const & data): FilteringPlugin(data) {}
+
+    void run() override;
+
+    bool VisitCXXRecordDecl(CXXRecordDecl const *);
+};
+
+void DeadClass::run() {
+    if (compiler.getLangOpts().CPlusPlus) {
+        TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());
+    }
+}
+
+bool DeadClass::VisitCXXRecordDecl(CXXRecordDecl const * decl) {
+    if (ignoreLocation(decl) || !decl->isThisDeclarationADefinition())
+        return true;
+    if (decl->needsImplicitDefaultConstructor())
+        return true;
+    if (decl->getDescribedClassTemplate())
+        return true;
+    if (isa<ClassTemplateSpecializationDecl>(decl))
+        return true;
+    int otherCnt = 0;
+    int copyMoveCnt = 0;
+    for (auto i = decl->ctor_begin(); i != decl->ctor_end(); ++i) {
+        if (!i->isUserProvided())
+            continue;
+        if (i->isCopyOrMoveConstructor())
+            copyMoveCnt++;
+        else
+            otherCnt++;
+    }
+    if (otherCnt == 0 && copyMoveCnt > 0)
+    {
+        report(
+            DiagnosticsEngine::Warning,
+            "class has only copy/move constructors, must be dead",
+            decl->getLocStart())
+            << decl->getSourceRange();
+        for (auto i = decl->ctor_begin(); i != decl->ctor_end(); ++i) {
+            if (i->isDeleted())
+                continue;
+        }
+    }
+    return true;
+}
+
+loplugin::Plugin::Registration<DeadClass> X("deadclass");
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */