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50 lines
1.4 KiB
50 lines
1.4 KiB
4 months ago
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//===--------------------- catch_pointer_nullptr.cpp ----------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++98, c++03, libcxxabi-no-exceptions
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#include <cassert>
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#include <cstdlib>
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struct A {};
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template<typename T, bool CanCatchNullptr>
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static void catch_nullptr_test() {
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try {
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throw nullptr;
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} catch (T &p) {
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assert(CanCatchNullptr && !static_cast<bool>(p));
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} catch (...) {
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assert(!CanCatchNullptr);
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}
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}
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int main()
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{
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using nullptr_t = decltype(nullptr);
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// A reference to nullptr_t can catch nullptr.
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catch_nullptr_test<nullptr_t, true>();
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catch_nullptr_test<const nullptr_t, true>();
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catch_nullptr_test<volatile nullptr_t, true>();
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catch_nullptr_test<const volatile nullptr_t, true>();
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// No other reference type can.
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#if 0
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// FIXME: These tests fail, because the ABI provides no way for us to
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// distinguish this from catching by value.
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catch_nullptr_test<void *, false>();
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catch_nullptr_test<void * const, false>();
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catch_nullptr_test<int *, false>();
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catch_nullptr_test<A *, false>();
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catch_nullptr_test<int A::*, false>();
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catch_nullptr_test<int (A::*)(), false>();
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#endif
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}
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