compiler check for unused variables

This is for variables that the compiler itself cannot figure out
(e.g. non-trivial ctors). The classes need to be marked manually.

Change-Id: I0109972e11e20578b1adc32065f701a871ee21aa

1 files changed, 35 insertions, 0 deletions

diff --git a/compilerplugins/clang/unusedvariablecheck.hxx b/compilerplugins/clang/unusedvariablecheck.hxx
new file mode 100644
index 000000000000..c49532a86414
--- /dev/null
+++ b/compilerplugins/clang/unusedvariablecheck.hxx
@@ -0,0 +1,35 @@
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * Based on LLVM/Clang.
+ *
+ * This file is distributed under the University of Illinois Open Source
+ * License. See LICENSE.TXT for details.
+ *
+ */
+
+#ifndef UNUSEDVARIABLECHECK_H
+#define UNUSEDVARIABLECHECK_H
+
+#include <clang/AST/RecursiveASTVisitor.h>
+
+using namespace clang;
+
+namespace loplugin
+{
+
+class UnusedVariableCheck
+    : public RecursiveASTVisitor< UnusedVariableCheck >
+    {
+    public:
+        explicit UnusedVariableCheck( ASTContext& context );
+        void run();
+        bool VisitNamedDecl( NamedDecl* declaration );
+    private:
+        DiagnosticBuilder report( DiagnosticsEngine::Level level, StringRef message, SourceLocation loc );
+        ASTContext& context;
+    };
+
+} // namespace
+
+#endif // UNUSEDVARIABLECHECK_H