using typedef to create aligned types

MSDN says that I can use typedef to make aligned versions of my types, eg:

typedef __declspec(align(16)) Fred FredAligned16;

This works when I declare variables, eg:

Fred fred1;
FredAligned16 fred2;	

fred2 is 16 bytes aligned, while fred1 is not

But the strange thing is that sizeof(Fred) == sizeof(FredAligned16) is true,
even though Fred's size is not a multiple of 16 bytes...

When I declare different types (ie. not using typedef), then the sizeof will
be different because the aligned type will be padded to the next multiple of
16 bytes.

Is this a bug in the compiler??



Thanks,

Andras




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