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Test for dynamic_cast compiler bug #4015

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Test for dynamic_cast compiler bug #4015

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29 changes: 29 additions & 0 deletions tests/numerics/numeric_vector_test.h
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@
#include <memory>

#define NUMERICVECTORTEST \
CPPUNIT_TEST( testCasting ); \
CPPUNIT_TEST( testLocalize ); \
CPPUNIT_TEST( testLocalizeBase ); \
CPPUNIT_TEST( testLocalizeIndices ); \
Expand Down Expand Up @@ -58,6 +59,25 @@ class NumericVectorTest : public CppUnit::TestCase {
void tearDown()
{}

#ifdef LIBMESH_HAVE_RTTI
template <class Base, class Derived>
void Casting()
{
// https://stackoverflow.com/questions/79192304/macos-xcode-16-breaks-dynamic-cast-for-final-types-defined-in-shared-library
//
// XCode 16.1 has a bug where a subclass declared final cannot be
// dynamically cast to a parent class. Let's make sure that
// doesn't affect this build.

auto v_ptr = std::make_unique<Derived>(*my_comm, global_size, local_size);

Derived * d_ptr = dynamic_cast<Derived *>(v_ptr.get());
libmesh_assert_msg(d_ptr,
"Dynamic cast failed on this system. XCode 16 bug?");
CPPUNIT_ASSERT(d_ptr);
}
#endif

template <class Base, class Derived>
void Operations()
{
Expand Down Expand Up @@ -355,6 +375,15 @@ class NumericVectorTest : public CppUnit::TestCase {
Norms<libMesh::NumericVector<libMesh::Number>,DerivedClass>();
}

void testCasting()
{
LOG_UNIT_TEST;

#ifdef LIBMESH_HAVE_RTTI
Casting<libMesh::NumericVector<libMesh::Number>,DerivedClass>();
#endif // LIBMESH_HAVE_RTTI
}

void testOperations()
{
LOG_UNIT_TEST;
Expand Down