blob: d722ea07b7a23472178cee814d01e8e98d7caf0c [file] [log] [blame]
//===--------------------- catch_pointer_nullptr.cpp ----------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include <cassert>
#include <cstdlib>
#include <iostream>
// Roll our own assertion macro to get better error messages out of the tests.
// In particular on systems that don't use __PRETTY_FUNCTION__ in assertions.
#define my_assert(pred, msg) do_assert(pred, msg, __LINE__, __PRETTY_FUNCTION__)
void do_assert(bool assert_passed, const char* msg, int line, const char* func) {
if (assert_passed) return;
std::cerr << __FILE__ << ":" << line << " " << func
<< ": Assertion Failed `" << msg << "'\n\n";
std::abort();
}
struct A {};
struct Base {};
struct Derived : public Base {};
template <class To>
bool test_conversion(To) { return true; }
template <class To>
bool test_conversion(...) { return false; }
template <class Pointer>
struct CreatePointer {
Pointer operator()() const {
return (Pointer)0;
}
};
template <class Tp>
struct CreatePointer<Tp*> {
Tp* operator()() const {
return (Tp*)42;
}
};
template <class Throw, class Catch>
void catch_pointer_test() {
Throw throw_ptr = CreatePointer<Throw>()();
// Use the compiler to determine if the exception of type Throw can be
// implicitly converted to type Catch.
const bool can_convert = test_conversion<Catch>(throw_ptr);
try {
throw throw_ptr;
assert(false);
} catch (Catch catch_ptr) {
Catch catch2 = CreatePointer<Catch>()();
my_assert(can_convert, "non-convertible type incorrectly caught");
my_assert(catch_ptr == catch2,
"Thrown pointer does not match caught ptr");
} catch (...) {
my_assert(!can_convert, "convertible type incorrectly not caught");
}
}
// Generate CV qualified pointer typedefs.
template <class Tp, bool First = false>
struct TestTypes {
typedef Tp* Type;
typedef Tp const* CType;
typedef Tp volatile* VType;
typedef Tp const volatile* CVType;
};
// Special case for cv-qualifying a pointer-to-member without adding an extra
// pointer to it.
template <class Member, class Class>
struct TestTypes<Member Class::*, true> {
typedef Member (Class::*Type);
typedef const Member (Class::*CType);
typedef volatile Member (Class::*VType);
typedef const volatile Member (Class::*CVType);
};
template <class Throw, class Catch, int level, bool first = false>
struct generate_tests_imp {
typedef TestTypes<Throw, first> ThrowTypes;
typedef TestTypes<Catch, first> CatchTypes;
void operator()() {
typedef typename ThrowTypes::Type Type;
typedef typename ThrowTypes::CType CType;
typedef typename ThrowTypes::VType VType;
typedef typename ThrowTypes::CVType CVType;
run_catch_tests<Type>();
run_catch_tests<CType>();
run_catch_tests<VType>();
run_catch_tests<CVType>();
}
template <class ThrowTp>
void run_catch_tests() {
typedef typename CatchTypes::Type Type;
typedef typename CatchTypes::CType CType;
typedef typename CatchTypes::VType VType;
typedef typename CatchTypes::CVType CVType;
catch_pointer_test<ThrowTp, Type>();
catch_pointer_test<ThrowTp, CType>();
catch_pointer_test<ThrowTp, VType>();
catch_pointer_test<ThrowTp, CVType>();
generate_tests_imp<ThrowTp, Type, level-1>()();
generate_tests_imp<ThrowTp, CType, level-1>()();
generate_tests_imp<ThrowTp, VType, level-1>()();
generate_tests_imp<ThrowTp, CVType, level-1>()();
}
};
template <class Throw, class Catch, bool first>
struct generate_tests_imp<Throw, Catch, 0, first> {
void operator()() {
catch_pointer_test<Throw, Catch>();
}
};
template <class Throw, class Catch, int level>
struct generate_tests : generate_tests_imp<Throw, Catch, level, true> {};
int main()
{
generate_tests<int, int, 3>()();
generate_tests<Base, Derived, 2>()();
generate_tests<Derived, Base, 2>()();
generate_tests<int, void, 2>()();
generate_tests<void, int, 2>()();
generate_tests<int A::*, int A::*, 3>()();
generate_tests<int A::*, void, 2>()();
generate_tests<void, int A::*, 2>()();
generate_tests<int Base::*, int Derived::*, 2>()();
generate_tests<int Derived::*, int Base::*, 2>()();
}