(void) (void)

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3 total messages Started by Arthur David Olson Mon, 05 Sep 1988 17:18

#5324

Author: Arthur David Olson
Date: Mon, 05 Sep 1988 17:18

9 lines
409 bytes

main()
{
	(void) (void) 5;
	return 0;
}

Is the above legal ANSI code?  Should it be?
-- 
	ado@ncifcrf.gov			ADO is a trademark of Ampex.

Re: (void) (void)

#5325

Author: Doug Gwyn
Date: Tue, 06 Sep 1988 03:16

6 lines
606 bytes

In article <8131@elsie.UUCP> ado@elsie.UUCP (Arthur David Olson) writes:
>	(void) (void) 5;
>Is the above legal ANSI code?  Should it be?

It's supposed to be.  I remember the committee voting explicitly
to allow casting a void expression to void.

Re: (void) (void)

#5345

Author: T. William Wells
Date: Wed, 07 Sep 1988 13:25

17 lines
935 bytes

In article <8131@elsie.UUCP> ado@elsie.UUCP (Arthur David Olson) writes:
:       (void) (void) 5;
: Is the above legal ANSI code?  Should it be?

From section 3.2.2.2:

"The (nonexistent) value of a *void expression* (an expression
that has type _void_) shall not be used in any way, and implicit
or explicit conversions (except to _void_) shall not be applied
to such an expression."

In other words, yes: there is a specific exception in the
standard that permits this.

---
Bill
novavax!proxftl!bill

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