loplugin:passstuffbyref improved return in canvas and svtools

and for now, ignore methods with params so we don't fall into the trap
of thinking that calls to methods like:
Bar& foo(Bar &p) { return p; }
can be converted from
Bar f() { return foo(Bar()); }
to
Bar const & f() { return foo(Bar()); }

Change-Id: Ia3795eb2baf353cb6bec4ebf40451f2789d66ad7
Reviewed-on: https://gerrit.libreoffice.org/47034
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/svtools/helpopt.hxx b/include/svtools/helpopt.hxx
index 0a5bbf5666fb..6d55ad0b00b3 100644
--- a/include/svtools/helpopt.hxx
+++ b/include/svtools/helpopt.hxx
@@ -44,7 +44,7 @@ public:
     const OUString& GetHelpStyleSheet()const;
     void            SetHelpStyleSheet(const OUString& rStyleSheet);
 
-    OUString        GetSystem() const;
+    OUString const & GetSystem() const;
 };
 
 #endif