Possible Duplicate:
Can sizeof return 0 (zero)
Is there a legal way to define type with zero-size in C++?
Possible Duplicate: Can sizeof return 0 (zero) Is there a legal way to define
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Possible Duplicate:
Can sizeof return 0 (zero)
Is there a legal way to define type with zero-size in C++?
C++ Standard.
1.8.5.
Unless it is a bit-field (9.6), a most derived object shall have a non-zero size and shall occupy one or more
bytes of storage. Base class sub-objects may have zero size. An object of POD type (3.9) shall occupy
contiguous bytes of storage.
9.6.2.
A declaration for a bit-field that omits the identifier declares an unnamed bit-field. Unnamed bit-fields are
not members and cannot be initialized. As a special case, an unnamed bit-field with a width of zero specifies alignment
of the next bit-field at an allocation unit boundary. Only when declaring an unnamed bit-field may
the constant-expression be a value equal to zero.