mirror of
https://github.com/llvm/llvm-project.git
synced 2025-04-25 14:16:08 +00:00
292533324c
Sometimes libc++'s stddef.h wrapper gets included, which defines ::nullptr_t. This test is compiled with -Wshadow -Werror, so shadowing ::nullptr_t with a nullptr_t in main is an error. Include cstddef, which is guaranteed to define std::nullptr_t in C++11 and forward. Reviewed By: ldionne, #libc_abi Differential Revision: https://reviews.llvm.org/D137127
54 lines
1.5 KiB
C++
54 lines
1.5 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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 <cstddef>
|
|
#include <cstdlib>
|
|
#include <type_traits>
|
|
|
|
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(int, char**)
|
|
{
|
|
static_assert(std::is_same<std::nullptr_t, decltype(nullptr)>::value, "");
|
|
|
|
// A reference to nullptr_t can catch nullptr.
|
|
catch_nullptr_test<std::nullptr_t, true>();
|
|
catch_nullptr_test<const std::nullptr_t, true>();
|
|
catch_nullptr_test<volatile std::nullptr_t, true>();
|
|
catch_nullptr_test<const volatile std::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
|
|
|
|
return 0;
|
|
}
|