The new alignof operator is followed by a parenthesized type-id,
similar to the existing syntax for sizeof.  But unlike sizeof,
it can't be applied to a unary-expression.  Why the restriction?

(N1971, which appears to be the original proposal for alignof,
shows a form "alignof ( constant-expression )", which apparently
just yields the value of the expression (I haven't figured out why
this would be useful).  If that had survived, it could conflict with
"alignof unary-expression".  Is that the reason?)

--
Keith Thompson (The_Other_Keith) kst-u@mib.org<http://www.ghoti.net/~kst>
Nokia
"We must do something.  This is something.  Therefore, we must do this."
     -- Antony Jay and Jonathan Lynn, "Yes Minister"


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