invalid offsetof from non-POD type

[Gabriel Dos Reis]

John Quigley <johnw@lowestplane.org> writes:

| The code below triggers an "invalid offsetof from non-POD type" warning:

The compiler is right.

| In this case, and in every case I've seen, the warning is a false alarm and 

No, that is not false alarm.  Your class Foo is *not* a POD, and as
such your program, technically, invokes undefined behaviour.

[...]

| class Foo
| {
|    public:
|       int x;
|       char fillerdata[256];
|       int y;
| 
|       Foo()
        ^^^^^ 

Your class has a user-defined constructor, therefore it certainly
cannot not be a POD.  Hence the warning. 


(if it were only me, I would issue a hard error and halt translation.)

-- Gaby