| 1 | // Test virtual casts with polymorphic types.
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| 2 |
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| 3 | /* IMPORTANT: The virtual system has not been finalized. However the
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| 4 | * exception system does depend on the work-in-progress version currently
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| 5 | * supported. That is also why the tests under the exception directory.
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| 6 | */
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| 7 |
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| 8 | #include <assert.h>
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| 9 |
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| 10 | struct mono_base_vtable {
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| 11 | mono_base_vtable const * const parent;
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| 12 | };
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| 13 |
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| 14 | struct mono_base {
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| 15 | mono_base_vtable const * virtual_table;
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| 16 | };
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| 17 |
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| 18 | forall(otype T)
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| 19 | struct mono_child_vtable {
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| 20 | mono_base_vtable const * const parent;
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| 21 | };
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| 22 |
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| 23 | forall(otype T)
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| 24 | struct mono_child {
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| 25 | mono_child_vtable(T) const * virtual_table;
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| 26 | };
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| 27 |
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| 28 | mono_base_vtable _mono_base_vtable_instance @= { 0 };
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| 29 | mono_child_vtable(int) _mono_child_vtable_instance @= {
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| 30 | &_mono_base_vtable_instance
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| 31 | };
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| 32 |
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| 33 | void mono_poly_test(void) {
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| 34 | mono_child(int) child = { &_mono_child_vtable_instance };
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| 35 | mono_base * base = (virtual mono_base *)&child;
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| 36 | assert(base);
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| 37 | }
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| 38 |
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| 39 | forall(otype U)
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| 40 | struct poly_base_vtable {
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| 41 | poly_base_vtable(U) const * const parent;
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| 42 | };
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| 43 |
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| 44 | forall(otype U)
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| 45 | struct poly_base {
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| 46 | poly_base_vtable(U) const * virtual_table;
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| 47 | };
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| 48 |
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| 49 | forall(otype V)
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| 50 | struct poly_child_vtable {
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| 51 | poly_base_vtable(V) const * const parent;
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| 52 | };
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| 53 |
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| 54 | forall(otype V)
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| 55 | struct poly_child {
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| 56 | poly_child_vtable(V) const * virtual_table;
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| 57 | };
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| 58 |
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| 59 | poly_base_vtable(int) _poly_base_vtable_instance @= { 0 };
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| 60 | poly_child_vtable(int) _poly_child_vtable_instance @= {
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| 61 | &_poly_base_vtable_instance
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| 62 | };
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| 63 | /* Resolver bug keeps me from adding these.
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| 64 | poly_base_vtable(char) _poly_base_vtable_instance @= { 0 };
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| 65 | poly_child_vtable(char) _poly_child_vtable_instance @= {
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| 66 | &_poly_base_vtable_instance
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| 67 | };
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| 68 | */
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| 69 |
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| 70 | void poly_poly_test() {
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| 71 | poly_child(int) child = { &_poly_child_vtable_instance };
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| 72 | poly_base(int) * base = (virtual poly_base(int) *)&child;
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| 73 | assert(base);
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| 74 | }
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| 75 |
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| 76 | int main(void) {
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| 77 | mono_poly_test();
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| 78 | poly_poly_test();
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| 79 | printf( "done\n" ); // non-empty .expect file
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| 80 | }
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