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//===----------------------------------------------------------------------===//
//
// 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: no-exceptions
// FIXME: This test fails in MSVC mode due to a stack overflow
// XFAIL: msvc
// <exception>
// class nested_exception;
// template <class E> void rethrow_if_nested(const E& e);
#include <exception>
#include <cstddef>
#include <cstdlib>
#include <cassert>
#include <utility>
#include "test_macros.h"
class A
{
int data_;
public:
explicit A(int data) : data_(data) {}
A(const A&) = default;
A& operator=(const A&) = default;
virtual ~A() TEST_NOEXCEPT {}
friend bool operator==(const A& x, const A& y) {return x.data_ == y.data_;}
};
class B
: public std::nested_exception,
public A
{
public:
explicit B(int data) : A(data) {}
B(const B& b) : A(b) {}
};
class C
{
public:
virtual ~C() {}
C * operator&() const { assert(false); return nullptr; } // should not be called
};
class D : private std::nested_exception {};
class E1 : public std::nested_exception {};
class E2 : public std::nested_exception {};
class E : public E1, public E2 {};
#if TEST_STD_VER >= 11
template <class, class...>
struct can_rethrow_if_nested_impl {
static constexpr bool value = false;
};
template <class... Args>
struct can_rethrow_if_nested_impl<decltype((void)std::rethrow_if_nested(std::declval<Args>()...)), Args...> {
static constexpr bool value = true;
};
template <class... Args>
struct can_rethrow_if_nested : can_rethrow_if_nested_impl<void, Args...> {};
static_assert(!can_rethrow_if_nested<>::value, "");
static_assert(can_rethrow_if_nested<A>::value, "");
static_assert(can_rethrow_if_nested<const A&>::value, "");
static_assert(can_rethrow_if_nested<B>::value, "");
static_assert(can_rethrow_if_nested<const B&>::value, "");
static_assert(!can_rethrow_if_nested<A, int*>::value, "");
static_assert(!can_rethrow_if_nested<B, int*>::value, "");
static_assert(!can_rethrow_if_nested<A, std::nullptr_t>::value, "");
static_assert(!can_rethrow_if_nested<B, std::nullptr_t>::value, "");
#endif
int main(int, char**)
{
{
try
{
A a(3); // not a polymorphic type --> no effect
std::rethrow_if_nested(a);
assert(true);
}
catch (...)
{
assert(false);
}
}
{
try
{
D s; // inaccessible base class --> no effect
std::rethrow_if_nested(s);
assert(true);
}
catch (...)
{
assert(false);
}
}
{
try
{
E s; // ambiguous base class --> no effect
std::rethrow_if_nested(s);
assert(true);
}
catch (...)
{
assert(false);
}
}
{
try
{
throw B(5);
}
catch (const B& b)
{
try
{
throw b;
}
catch (const A& a)
{
try
{
std::rethrow_if_nested(a);
assert(false);
}
catch (const B& b2)
{
assert(b2 == B(5));
}
}
}
}
{
try
{
std::rethrow_if_nested(C());
assert(true);
}
catch (...)
{
assert(false);
}
}
return 0;
}
|
