Re: luabind: problem retrieving values from table indexed by non-built-in classes

As the following simple test case shows, there's definitely a bug in Luabind's conversion for complex types: struct test_param : wrap_base { int obj; bool operator==(test_param const& rhs) const { return obj == rhs.obj ; } }; void test_main(lua_State* L) { using namespace luabind; module(L) [ class_<test_param>("test_param")         .def(constructor<>())         .def_readwrite("obj", &test_param::obj)         .def(const_self == const_self) ]; object tabc, zzk, zzv; test_param tp, tp1; tp.obj = 123456; // create new table tabc = newtable(L); // set tabc[tp] = 5; //            o      k   v settable( tabc,  tp, 5); // get access to entry through iterator() API iterator zzi(tabc); // get the key object zzk = zzi.key(); // read back the value through gettable() API //                           
 o      k zzv = gettable(tabc, zzk);   // check the entry has the same value // irrespective of access method TEST_CHECK ( *zzi == 5 &&                      object_cast<int>(zzv) == 5 ); // convert key to its REAL type (test_param) tp1 = object_cast<test_param>(zzk); // check two keys are the same TEST_CHECK( tp == tp1 ); // read the value back from table using REAL key type zzv = gettable(tabc, tp1); // check the value TEST_CHECK( object_cast<int>(zzv) == 5 ); // the previous call FAILS with // Terminated with exception: "unable to make cast" // this is because gettable() doesn't return // a TRUE value, but nil instead } Hopefully, someone smarter than me can figure this out, Thx

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