[cfe-dev] Implementation of the CGRecordLayoutBuilder for Microsoft ABI.

[Eli Friedman]

On Mon, Sep 26, 2011 at 4:36 PM, Francois Pichet <pichet2000 at gmail.com> wrote:
> On Mon, Sep 26, 2011 at 6:52 PM, Eli Friedman <eli.friedman at gmail.com> wrote:
>> On Mon, Sep 26, 2011 at 6:09 AM, r4start <r4start at gmail.com> wrote:
>>> I really don't understand why align=4 isn't correct.
>>> I always thought that #pragma pack only affects members of the structure.
>>> And __declspec(align(n)) specifies the alignment for objects of type.
>>> In MSVS align for B is 4 and for A is 1.
>>
>> The only answer I can come up with is the model MSVC uses is simply insane.
>>
>> One more attempt to get some sanity: does the following compile with
>> MSVC?  If so, what is the output?
>>
>> #include <cstdio>
>> class A {
>>  char c;
>> };
>> class B : public virtual A {
>>  public:
>>  void *p;
>> };
>> B* x = new B[10];
>> int main() { std::printf("%d\n", (int)(x[1].p)); }
>>
>
> it compiles and the output is 0.
> not sure what you are trying to test here.

Err, I meant to write the following:
int main() { std::printf("%d\n", (int)&(x[1].p)); }

-Eli