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// RUN: %clang_cc1 -std=c++11 -cxx-abi microsoft -fms-compatibility -fsyntax-only -triple=i386-pc-win32 -verify %s
// RUN: %clang_cc1 -std=c++11 -cxx-abi microsoft -fms-compatibility -fsyntax-only -triple=x86_64-pc-win32 -verify %s
//
// This file should also give no diagnostics when run through cl.exe from MSVS
// 2012, which supports C++11 and static_assert. It should pass for both 64-bit
// and 32-bit x86.
//
// expected-no-diagnostics
// Test the size of various member pointer combinations:
// - complete and incomplete
// - single, multiple, and virtual inheritance (and unspecified for incomplete)
// - data and function pointers
// - templated with declared specializations with annotations
// - template that can be instantiated
// http://llvm.org/PR12070
struct Foo {
typedef int Foo::*FooInt;
int f;
};
enum {
kSingleDataSize = 1 * sizeof(int),
kSingleFunctionSize = 1 * sizeof(void *),
kMultipleDataSize = 1 * sizeof(int),
kMultipleFunctionSize = 2 * sizeof(void *),
kVirtualDataSize = 2 * sizeof(int),
kVirtualFunctionSize = 2 * sizeof(int) + 1 * sizeof(void *),
// Unspecified is weird, it's 1 more slot than virtual.
kUnspecifiedDataSize = kVirtualDataSize + 1 * sizeof(int),
kUnspecifiedFunctionSize = kVirtualFunctionSize + 1 * sizeof(void *),
};
// incomplete types
class __single_inheritance IncSingle;
class __multiple_inheritance IncMultiple;
class __virtual_inheritance IncVirtual;
static_assert(sizeof(int IncSingle::*) == kSingleDataSize, "");
static_assert(sizeof(int IncMultiple::*) == kMultipleDataSize, "");
static_assert(sizeof(int IncVirtual::*) == kVirtualDataSize, "");
static_assert(sizeof(void (IncSingle::*)()) == kSingleFunctionSize, "");
static_assert(sizeof(void (IncMultiple::*)()) == kMultipleFunctionSize, "");
static_assert(sizeof(void (IncVirtual::*)()) == kVirtualFunctionSize, "");
// An incomplete type with an unspecified inheritance model seems to take one
// more slot than virtual. It's not clear what it's used for yet.
class IncUnspecified;
static_assert(sizeof(int IncUnspecified::*) == kUnspecifiedDataSize, "");
static_assert(sizeof(void (IncUnspecified::*)()) == kUnspecifiedFunctionSize, "");
// complete types
struct B1 { };
struct B2 { };
struct Single { };
struct Multiple : B1, B2 { };
struct Virtual : virtual B1 { };
static_assert(sizeof(int Single::*) == kSingleDataSize, "");
static_assert(sizeof(int Multiple::*) == kMultipleDataSize, "");
static_assert(sizeof(int Virtual::*) == kVirtualDataSize, "");
static_assert(sizeof(void (Single::*)()) == kSingleFunctionSize, "");
static_assert(sizeof(void (Multiple::*)()) == kMultipleFunctionSize, "");
static_assert(sizeof(void (Virtual::*)()) == kVirtualFunctionSize, "");
// Test both declared and defined templates.
template <typename T> class X;
template <> class __single_inheritance X<IncSingle>;
template <> class __multiple_inheritance X<IncMultiple>;
template <> class __virtual_inheritance X<IncVirtual>;
// Don't declare X<IncUnspecified>.
static_assert(sizeof(int X<IncSingle>::*) == kSingleDataSize, "");
static_assert(sizeof(int X<IncMultiple>::*) == kMultipleDataSize, "");
static_assert(sizeof(int X<IncVirtual>::*) == kVirtualDataSize, "");
static_assert(sizeof(int X<IncUnspecified>::*) == kUnspecifiedDataSize, "");
static_assert(sizeof(void (X<IncSingle>::*)()) == kSingleFunctionSize, "");
static_assert(sizeof(void (X<IncMultiple>::*)()) == kMultipleFunctionSize, "");
static_assert(sizeof(void (X<IncVirtual>::*)()) == kVirtualFunctionSize, "");
static_assert(sizeof(void (X<IncUnspecified>::*)()) == kUnspecifiedFunctionSize, "");
template <typename T>
struct Y : T { };
static_assert(sizeof(int Y<Single>::*) == kSingleDataSize, "");
static_assert(sizeof(int Y<Multiple>::*) == kMultipleDataSize, "");
static_assert(sizeof(int Y<Virtual>::*) == kVirtualDataSize, "");
static_assert(sizeof(void (Y<Single>::*)()) == kSingleFunctionSize, "");
static_assert(sizeof(void (Y<Multiple>::*)()) == kMultipleFunctionSize, "");
static_assert(sizeof(void (Y<Virtual>::*)()) == kVirtualFunctionSize, "");
struct A { int x; void bar(); };
struct B : A { virtual void foo(); };
static_assert(sizeof(int B::*) == kSingleDataSize, "");
// A non-primary base class uses the multiple inheritance model for member
// pointers.
static_assert(sizeof(void (B::*)()) == kMultipleFunctionSize, "");
struct AA { int x; virtual void foo(); };
struct BB : AA { void bar(); };
struct CC : BB { virtual void baz(); };
static_assert(sizeof(void (CC::*)()) == kSingleFunctionSize, "");
// We start out unspecified.
struct ForwardDecl1;
struct ForwardDecl2;
// Re-declare to force us to iterate decls when adding attributes.
struct ForwardDecl1;
struct ForwardDecl2;
typedef int ForwardDecl1::*MemPtr1;
typedef int ForwardDecl2::*MemPtr2;
MemPtr1 variable_forces_sizing;
struct ForwardDecl1 : B {
virtual void foo();
};
struct ForwardDecl2 : B {
virtual void foo();
};
static_assert(sizeof(variable_forces_sizing) == kUnspecifiedDataSize, "");
static_assert(sizeof(MemPtr1) == kUnspecifiedDataSize, "");
// FIXME: Clang fails this assert because it locks in the inheritance model at
// the point of the typedef instead of the first usage, while MSVC does not.
//static_assert(sizeof(MemPtr2) == kSingleDataSize, "");
struct MemPtrInBody {
typedef int MemPtrInBody::*MemPtr;
int a;
operator MemPtr() const {
return a ? &MemPtrInBody::a : 0;
}
};
static_assert(sizeof(MemPtrInBody::MemPtr) == kSingleDataSize, "");
// Passing a member pointer through a template should get the right size.
template<typename T>
struct SingleTemplate;
template<typename T>
struct SingleTemplate<void (T::*)(void)> {
static_assert(sizeof(int T::*) == kSingleDataSize, "");
static_assert(sizeof(void (T::*)()) == kSingleFunctionSize, "");
};
template<typename T>
struct UnspecTemplate;
template<typename T>
struct UnspecTemplate<void (T::*)(void)> {
static_assert(sizeof(int T::*) == kUnspecifiedDataSize, "");
static_assert(sizeof(void (T::*)()) == kUnspecifiedFunctionSize, "");
};
struct NewUnspecified;
SingleTemplate<void (IncSingle::*)()> tmpl_single;
UnspecTemplate<void (NewUnspecified::*)()> tmpl_unspec;
struct NewUnspecified { };
static_assert(sizeof(void (NewUnspecified::*)()) == kUnspecifiedFunctionSize, "");
template <typename T>
struct MemPtrInTemplate {
// We can't require that the template arg be complete until we're
// instantiated.
int T::*data_ptr;
void (T::*func_ptr)();
};
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