// Pls try the following program on virtual functions and try to do print on
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// Pls try the following program on virtual functions and try to do print on
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// most of the code in main(). Almost none of them works !
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// most of the code in main(). Almost none of them works !
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//
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//
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// The inheritance structure is:
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// The inheritance structure is:
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//
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//
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// V : VA VB
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// V : VA VB
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// A : (V)
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// A : (V)
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// B : A
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// B : A
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// D : AD (V)
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// D : AD (V)
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// C : (V)
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// C : (V)
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// E : B (V) D C
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// E : B (V) D C
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//
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//
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class VA
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class VA
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{
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{
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public:
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public:
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int va;
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int va;
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};
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};
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class VB
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class VB
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{
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{
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public:
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public:
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int vb;
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int vb;
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int fvb();
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int fvb();
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virtual int vvb();
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virtual int vvb();
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};
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};
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class V : public VA, public VB
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class V : public VA, public VB
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{
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{
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public:
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public:
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int f();
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int f();
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virtual int vv();
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virtual int vv();
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int w;
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int w;
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};
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};
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class A : virtual public V
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class A : virtual public V
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{
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{
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public:
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public:
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virtual int f();
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virtual int f();
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private:
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private:
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int a;
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int a;
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};
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};
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class B : public A
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class B : public A
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{
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{
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public:
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public:
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int f();
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int f();
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private:
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private:
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int b;
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int b;
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};
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};
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class C : public virtual V
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class C : public virtual V
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{
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{
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public:
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public:
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int c;
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int c;
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};
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};
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class AD
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class AD
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{
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{
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public:
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public:
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virtual int vg() = 0;
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virtual int vg() = 0;
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};
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};
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class D : public AD, virtual public V
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class D : public AD, virtual public V
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{
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{
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public:
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public:
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static void s();
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static void s();
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virtual int vg();
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virtual int vg();
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virtual int vd();
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virtual int vd();
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int fd();
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int fd();
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int d;
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int d;
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};
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};
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class E : public B, virtual public V, public D, public C
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class E : public B, virtual public V, public D, public C
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{
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{
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public:
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public:
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int f();
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int f();
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int vg();
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int vg();
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int vv();
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int vv();
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int e;
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int e;
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};
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};
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D dd;
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D dd;
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D* ppd = ⅆ
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D* ppd = ⅆ
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AD* pAd = ⅆ
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AD* pAd = ⅆ
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A a;
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A a;
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B b;
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B b;
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C c;
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C c;
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D d;
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D d;
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E e;
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E e;
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V v;
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V v;
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VB vb;
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VB vb;
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A* pAa = &a;
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A* pAa = &a;
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A* pAe = &e;
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A* pAe = &e;
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B* pBe = &e;
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B* pBe = &e;
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D* pDd = &d;
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D* pDd = &d;
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D* pDe = &e;
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D* pDe = &e;
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V* pVa = &a;
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V* pVa = &a;
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V* pVv = &v;
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V* pVv = &v;
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V* pVe = &e;
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V* pVe = &e;
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V* pVd = &d;
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V* pVd = &d;
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AD* pADe = &e;
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AD* pADe = &e;
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E* pEe = &e;
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E* pEe = &e;
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VB* pVB = &vb;
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VB* pVB = &vb;
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void init()
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void init()
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{
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{
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a.vb = 1;
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a.vb = 1;
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b.vb = 2;
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b.vb = 2;
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c.vb = 3;
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c.vb = 3;
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d.vb = 4;
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d.vb = 4;
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e.vb = 5;
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e.vb = 5;
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v.vb = 6;
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v.vb = 6;
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vb.vb = 7;
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vb.vb = 7;
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d.d = 1;
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d.d = 1;
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e.d = 2;
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e.d = 2;
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}
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}
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extern "C" int printf(const char *, ...);
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extern "C" int printf(const char *, ...);
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int all_count = 0;
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int all_count = 0;
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int failed_count = 0;
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int failed_count = 0;
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#define TEST(EXPR, EXPECTED) \
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#define TEST(EXPR, EXPECTED) \
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ret = EXPR; \
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ret = EXPR; \
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if (ret != EXPECTED) {\
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if (ret != EXPECTED) {\
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printf("Failed %s is %d, should be %d!\n", #EXPR, ret, EXPECTED); \
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printf("Failed %s is %d, should be %d!\n", #EXPR, ret, EXPECTED); \
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failed_count++; } \
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failed_count++; } \
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all_count++;
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all_count++;
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int ret;
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int ret;
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void test_calls()
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void test_calls()
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{
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{
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TEST(pAe->f(), 20);
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TEST(pAe->f(), 20);
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TEST(pAa->f(), 1);
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TEST(pAa->f(), 1);
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TEST(pDe->vg(), 202);
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TEST(pDe->vg(), 202);
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TEST(pADe->vg(), 202);
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TEST(pADe->vg(), 202);
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TEST(pDd->vg(), 101);
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TEST(pDd->vg(), 101);
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TEST(pEe->vvb(), 411);
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TEST(pEe->vvb(), 411);
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TEST(pVB->vvb(), 407);
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TEST(pVB->vvb(), 407);
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TEST(pBe->vvb(), 411);
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TEST(pBe->vvb(), 411);
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TEST(pDe->vvb(), 411);
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TEST(pDe->vvb(), 411);
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TEST(pEe->vd(), 282);
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TEST(pEe->vd(), 282);
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TEST(pEe->fvb(), 311);
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TEST(pEe->fvb(), 311);
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TEST(pEe->D::vg(), 102);
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TEST(pEe->D::vg(), 102);
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printf("Did %d tests, of which %d failed.\n", all_count, failed_count);
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printf("Did %d tests, of which %d failed.\n", all_count, failed_count);
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}
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}
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#ifdef usestubs
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#ifdef usestubs
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extern "C" {
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extern "C" {
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void set_debug_traps();
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void set_debug_traps();
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void breakpoint();
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void breakpoint();
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};
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};
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#endif
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#endif
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int main()
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int main()
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{
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{
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#ifdef usestubs
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#ifdef usestubs
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set_debug_traps();
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set_debug_traps();
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breakpoint();
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breakpoint();
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#endif
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#endif
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init();
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init();
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e.w = 7;
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e.w = 7;
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e.vb = 11;
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e.vb = 11;
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test_calls();
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test_calls();
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return 0;
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return 0;
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}
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}
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int A::f() {return 1;}
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int A::f() {return 1;}
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int B::f() {return 2;}
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int B::f() {return 2;}
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void D::s() {}
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void D::s() {}
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int E::f() {return 20;}
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int E::f() {return 20;}
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int D::vg() {return 100+d;}
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int D::vg() {return 100+d;}
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int E::vg() {return 200+d;}
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int E::vg() {return 200+d;}
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int V::f() {return 600+w;}
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int V::f() {return 600+w;}
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int V::vv() {return 400+w;}
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int V::vv() {return 400+w;}
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int E::vv() {return 450+w;}
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int E::vv() {return 450+w;}
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int D::fd() {return 250+d;}
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int D::fd() {return 250+d;}
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int D::vd() {return 280+d;}
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int D::vd() {return 280+d;}
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int VB::fvb() {return 300+vb;}
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int VB::fvb() {return 300+vb;}
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int VB::vvb() {return 400+vb;}
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int VB::vvb() {return 400+vb;}
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