loplugin:referencecasting look through more clang Types

Note that because of where the fix resides, loplugin:redundantcast
also notices a few more things.

Change-Id: I0b66047fadfff2c5ceafcbd3eab085de00d861a6
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/120865
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

1 files changed, 22 insertions, 0 deletions

diff --git a/compilerplugins/clang/test/referencecasting.cxx b/compilerplugins/clang/test/referencecasting.cxx
index a6850ed660ea..1b1e75f90cea 100644
--- a/compilerplugins/clang/test/referencecasting.cxx
+++ b/compilerplugins/clang/test/referencecasting.cxx
@@ -13,8 +13,10 @@
 #include "com/sun/star/uno/Sequence.hxx"
 #include "com/sun/star/uno/XInterface.hpp"
 #include "com/sun/star/io/XStreamListener.hpp"
+#include "com/sun/star/io/XInputStream.hpp"
 #include "com/sun/star/lang/XTypeProvider.hpp"
 #include "com/sun/star/lang/XComponent.hpp"
+#include "cppuhelper/implbase.hxx"
 #include "cppuhelper/weak.hxx"
 #include "rtl/ref.hxx"
 
@@ -192,4 +194,24 @@ void test14(css::uno::Sequence<css::uno::Reference<css::io::XStreamListener>> se
     }
 }
 
+namespace test15
+{
+class Foo : public cppu::WeakImplHelper<css::lang::XComponent, css::io::XInputStream>
+{
+    virtual ~Foo();
+    css::uno::Reference<css::lang::XTypeProvider> bar()
+    {
+        // expected-error@+1 {{the source reference is already a subtype of the destination reference, just use = [loplugin:referencecasting]}}
+        return css::uno::Reference<css::lang::XTypeProvider>(
+            static_cast<css::lang::XTypeProvider*>(this), css::uno::UNO_QUERY);
+    }
+    css::uno::Reference<css::io::XInputStream> bar2()
+    {
+        // expected-error@+1 {{the source reference is already a subtype of the destination reference, just use = [loplugin:referencecasting]}}
+        return css::uno::Reference<css::io::XInputStream>(static_cast<css::io::XInputStream*>(this),
+                                                          css::uno::UNO_QUERY);
+    }
+};
+}
+
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