[LLVMbugs] [Bug 13086] New: -Wunused-private-field warns on member variables that are used by uninstantiated template member functions

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=13086

             Bug #: 13086
           Summary: -Wunused-private-field warns on member variables that
                    are used by uninstantiated template member functions
           Product: clang
           Version: unspecified
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: nicolasweber at gmx.de
                CC: dgregor at apple.com, llvmbugs at cs.uiuc.edu
    Classification: Unclassified


-Wunused-private-field warns on this:

template <typename LayerType, typename LayerList, typename RenderSurfaceType,
typename IteratorActionType>
class CCLayerIterator {
};


struct CCLayerIteratorActions {
    class BackToFront {
    public:
        template <typename LayerType, typename LayerList, typename
RenderSurfaceType, typename ActionType>
        void begin(CCLayerIterator<LayerType, LayerList, RenderSurfaceType,
ActionType>&);

        template <typename LayerType, typename LayerList, typename
RenderSurfaceType, typename ActionType>
        void end(CCLayerIterator<LayerType, LayerList, RenderSurfaceType,
ActionType>&);

        template <typename LayerType, typename LayerList, typename
RenderSurfaceType, typename ActionType>
        void next(CCLayerIterator<LayerType, LayerList, RenderSurfaceType,
ActionType>&);

    private:
        int m_highestTargetRenderSurfaceLayer;
    };
};



hummer:Release thakis$ ~/src/llvm-svn/Release+Asserts/bin/clang -Wall foo.ii -c
-arch i386 -Wno-c++11-extensions
foo.ii:20:13: warning: private field 'm_highestTargetRenderSurfaceLayer' is not
used [-Wunused-private-field]
        int m_highestTargetRenderSurfaceLayer;
            ^
1 warning generated.




This is from WebKit. The template member functions are defined in a (different)
.cpp file. That's not right, but maybe the diagnostic for that could be less
unrelated?

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