On Sunday, 7 October 2012 at 10:45:40 UTC, novice2 wrote:
Thanx Maxim,
but what about

S2.sizeof (should be 6) = 8

S3.sizeof (should be 6) = 8

http://dpaste.dzfl.pl/57911897

Alignment attribute specifies members' alignment if it is inside structure and structure alignment if it is placed outside it. In case of S2 and S3 u member is placed without alignment and both structures contain 2+4 bytes, but because structures themselves are not specified with align() attribute, they are aligned to default 4 byte boundary and contain additional 2 trailing bytes. S4 is specified as having no alignment, so it's size is exactly 2+4 bytes.

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