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&* in C, you win!
- To: <markm>
- Subject: &* in C, you win!
- From: Roger Gregory <roger>
- Date: Wed, 2 May 90 23:51:18 PDT
- Cc: <xtech>
but you were wrong in agreeing with me.
from a posting of Doug Gwyn in comp.std.c
Doug was on the committee
+ Semantic violations are not forced simply by use of expressions
as operands of sizeof, in cases where the expressions would produce
semantic violations if actually executed. I.e. sizeof(&a[N]), which
expands to sizeof(&*(a+N)) is valid since a+N is a valid pointer,
even though *(a+N) cannot be executed in a strictly conforming
program. Strange but true: semantically invalid expressions may
occur in strictly conforming programs in some contexts so long as
they are never executed!
Here is his posting & disclaimer
I trust his opinion on this as he knows more about this than I (or he)