Add test for putting different types in a struct / union.

    typedef bitfield<BitField> Mask;

    struct Everything {

        union U {

            int8_t number;

            int8_t[1][2] multidimArray;

            pointer p;

            Fumble anotherStruct;

            bitfield<BitField> bf;

        } u;

        int8_t number;

        handle h;

        fmq_sync<uint8_t> descSync;

        fmq_unsync<uint8_t> descUnsync;

        memory mem;

        pointer p;

        string s;

        vec<string> vs;

        string[2][2] multidimArray;

        string[3] sArray;

        Quux anotherStruct;

        bitfield<BitField> bf;

    };

    doThis(float param);

    doThatAndReturnSomething(int64_t param) generates (int32_t result);

    doQuiteABit(int32_t a, int64_t b, float c, double d) generates (double something);