How to match argument reference in Google Mock

[Zangw]

I am newer for google mock. Now I have one question about how to match the argument reference? here are the codes

    class Parameter{
    public:
        int m_idata;
        char m_cdata;
        bool Parameter::operator ==(const Parameter& element) const{
            return (m_idata == element.m_idata && m_cdata == element.m_cdata);
        }
    };

    class FooInterface{
    public:
        virtual ~FooInterface() {}

        virtual void SetParameter(Parameter& val) = 0;
    };
    // mock class
    class MockFoo: public FooInterface {
    public:        
        MOCK_METHOD1(SetParameter, void(Parameter& val));
    };

    TEST(FooTest, setParameterTest)
    {   
            MockFoo mockFoo;

            EXPECT_CALL(mockFoo, SetParameter(An<Parameter&>())); // How to match argument reference???

            Parameter para;
            mockFoo.SetParameter(para);  // there is an exception here, why???
    }

and I also try those codes to match SetParameter()

Parameter test_para;
EXPECT_CALL(mockFoo, SetParameter(Ref(test_para)));

And

EXPECT_CALL(mockFoo, SetParameter(A<Parameter&>()));

Both those two codes can also cause exception... Could any one tell me how to match the argument reference Parameter& in the function SetParameter()?

[Vlad Losev]

What kinds of exceptions are you seeing? What are the error messages? What OS and what compiler are you using? Can you provide a short but complete code snippet?

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