86 lines
1.7 KiB
C++
86 lines
1.7 KiB
C++
#include <stdio.h>
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#include <string>
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#include <typeinfo>
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#include <Directory.h>
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#include <File.h>
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using std::string;
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struct A {
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A() {}
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virtual ~A() {}
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int a;
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};
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struct B : A {
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B() {}
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virtual ~B() {}
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int b;
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};
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struct C : A {
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C() {}
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virtual ~C() {}
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int c;
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};
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template<typename A, typename B, typename C>
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static void
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rtti_test(A *a, const char *inputClass, const char *classNameA,
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const char *classNameB, const char *classNameC)
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{
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printf("class %s\n", inputClass);
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printf(" dynamic_cast<%s*>(a): %p\n", classNameA, dynamic_cast<A*>(a));
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printf(" dynamic_cast<%s*>(a): %p\n", classNameB, dynamic_cast<B*>(a));
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printf(" dynamic_cast<%s*>(a): %p\n", classNameC, dynamic_cast<C*>(a));
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const std::type_info *info = &typeid(*a);
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printf(" typeinfo: %p, name: %s\n", info, (info ? info->name() : NULL));
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}
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int
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main()
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{
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// test with artificial classes defined in this file
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#define RTTI_TEST(obj, className) rtti_test<A, B, C>(obj, className, \
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"A", "B", "C")
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A a;
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B b;
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C c;
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printf("A: %p (vtable: %p)\n", &a, *(void**)&a);
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printf("B: %p (vtable: %p)\n", &b, *(void**)&b);
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printf("C: %p (vtable: %p)\n", &c, *(void**)&c);
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RTTI_TEST(&a, "A");
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RTTI_TEST(&b, "B");
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RTTI_TEST(&c, "C");
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// test with real classes defined in a library
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#undef RTTI_TEST
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#define RTTI_TEST(obj, className) rtti_test<BNode, BFile, BDirectory>(obj, \
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className, "BNode", "BFile", "BDirectory")
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BNode node;
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BFile file;
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BDirectory dir;
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printf("BNode: %p (vtable: %p)\n", &node, *(void**)&node);
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printf("BFile: %p (vtable: %p)\n", &file, *(void**)&file);
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printf("BDirectory: %p (vtable: %p)\n", &dir, *(void**)&dir);
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RTTI_TEST(&node, "BNode");
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RTTI_TEST(&file, "BFile");
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RTTI_TEST(&dir, "BDirectory");
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return 0;
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}
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