filter out some of the AST in the plugins

by checking if the current namespace decl is in our code, so we have to
scan less stuff, which results in a 10% perf improvement for me

Change-Id: Idf0e30d57b6d0dcd13daa9ed679c28b9d233d387
Reviewed-on: https://gerrit.libreoffice.org/58942
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

1 files changed, 2 insertions, 2 deletions

diff --git a/compilerplugins/clang/stringconcat.cxx b/compilerplugins/clang/stringconcat.cxx
index 43300fba56565..caa8e61ddedb0 100644
--- a/compilerplugins/clang/stringconcat.cxx
+++ b/compilerplugins/clang/stringconcat.cxx
@@ -42,11 +42,11 @@ Expr const * stripCtor(Expr const * expr) {
 }
 
 class StringConcat:
-    public RecursiveASTVisitor<StringConcat>, public loplugin::Plugin
+    public loplugin::FilteringPlugin<StringConcat>
 {
 public:
     explicit StringConcat(loplugin::InstantiationData const & data):
-        Plugin(data) {}
+        FilteringPlugin(data) {}
 
     void run() override
     { TraverseDecl(compiler.getASTContext().getTranslationUnitDecl()); }