add 'explicit operator bool' to our reference classes

Change-Id: I91cfbe2646dcc55b98d2b809c49c9ea073f54f58
Reviewed-on: https://gerrit.libreoffice.org/33517
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/tools/ref.hxx b/include/tools/ref.hxx
index c251a7839f7a..97a5b362254e 100644
--- a/include/tools/ref.hxx
+++ b/include/tools/ref.hxx
@@ -90,6 +90,8 @@ public:
 
     bool Is()         const { return pObj != nullptr; }
 
+    explicit operator bool() const { return Is(); }
+
     T * get()         const { return pObj; }
 
     T * operator ->() const { assert(pObj != nullptr); return pObj; }