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-rw-r--r--compilerplugins/clang/store/derivedclass.cxx70
1 files changed, 70 insertions, 0 deletions
diff --git a/compilerplugins/clang/store/derivedclass.cxx b/compilerplugins/clang/store/derivedclass.cxx
new file mode 100644
index 000000000..a1df0c253
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+++ b/compilerplugins/clang/store/derivedclass.cxx
@@ -0,0 +1,70 @@
+/* -*- 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 DerivedClass:
+ public loplugin::FilteringPlugin<DerivedClass>
+{
+public:
+ explicit DerivedClass(InstantiationData const & data):
+ FilteringPlugin(data) {}
+
+ virtual void run() override
+ { TraverseDecl(compiler.getASTContext().getTranslationUnitDecl()); }
+
+ bool VisitCXXRecordDecl(CXXRecordDecl const * decl);
+};
+
+bool BaseCheck(const CXXRecordDecl *BaseDefinition, void *BaseClassName) {
+ // print warning about deriving from this classes
+ // the name has to contain namespace, e.g. foo::bar::ClassName
+ const char *BaseClasses[] = {
+ "Dialog",
+ "ProgressBar",
+ "SfxToolBoxControl",
+ "StatusBar",
+ 0,
+ };
+ for (int i = 0; BaseClasses[i]; i++)
+ if (BaseDefinition->getQualifiedNameAsString().compare(BaseClasses[i]) == 0) {
+ *(const char **)BaseClassName = BaseClasses[i];
+ return false;
+ }
+ return true;
+}
+
+bool DerivedClass::VisitCXXRecordDecl(CXXRecordDecl const * decl) {
+ const char *BaseClassName = 0;
+ // checking for decl->hasDefinition() avoids crash in decl->forallBases
+ if (decl->hasDefinition() &&
+ // not sure what hasAnyDependentBases() does,
+ // but it avoids classes we don't want, e.g. WeakAggComponentImplHelper1
+ !decl->hasAnyDependentBases() &&
+ !decl->forallBases(BaseCheck, &BaseClassName)) {
+ string warning_msg("class %0 derives from ");
+ // no idea how BaseClassName can be 0 sometimes...
+ if (BaseClassName)
+ warning_msg += BaseClassName;
+ report(
+ DiagnosticsEngine::Warning,
+ warning_msg,
+ decl->getLocStart())
+ << decl->getQualifiedNameAsString() << decl->getSourceRange();
+ }
+ return true;
+}
+
+loplugin::Plugin::Registration<DerivedClass> X("derivedclass");
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 tabstop=4 expandtab: */