catch_reference_nullptr.pass.cpp
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//===--------------------- catch_pointer_nullptr.cpp ----------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03,
// UNSUPPORTED: no-exceptions
#include <cassert>
#include <cstdlib>
struct A {};
template<typename T, bool CanCatchNullptr>
static void catch_nullptr_test() {
try {
throw nullptr;
} catch (T &p) {
assert(CanCatchNullptr && !static_cast<bool>(p));
} catch (...) {
assert(!CanCatchNullptr);
}
}
int main()
{
using nullptr_t = decltype(nullptr);
// A reference to nullptr_t can catch nullptr.
catch_nullptr_test<nullptr_t, true>();
catch_nullptr_test<const nullptr_t, true>();
catch_nullptr_test<volatile nullptr_t, true>();
catch_nullptr_test<const volatile nullptr_t, true>();
// No other reference type can.
#if 0
// FIXME: These tests fail, because the ABI provides no way for us to
// distinguish this from catching by value.
catch_nullptr_test<void *, false>();
catch_nullptr_test<void * const, false>();
catch_nullptr_test<int *, false>();
catch_nullptr_test<A *, false>();
catch_nullptr_test<int A::*, false>();
catch_nullptr_test<int (A::*)(), false>();
#endif
}