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### 449. Library Issue 306 Goes Too Far

Section: 17.2 [support.types] Status: CD1 Submitter: Pete Becker Opened: 2004-01-15 Last modified: 2016-01-28

Priority: Not Prioritized

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Discussion:

Original text:

> The macro offsetof accepts a restricted set of type arguments in this International Standard. type shall be a POD structure or a POD union (clause 9). The result of applying the offsetof macro to a field that is a static data member or a function member is undefined."

Revised text:

> "If type is not a POD structure or a POD union the results are undefined."

Looks to me like the revised text should have replaced only the second sentence. It doesn't make sense standing alone.

Proposed resolution:

Change 18.1, paragraph 5, to:

> The macro offsetof accepts a restricted set of type arguments in this International Standard. If type is not a POD structure or a POD union the results are undefined. The result of applying the offsetof macro to a field that is a static data member or a function member is undefined."