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From: walter@hpclwjm.HP.COM (Walter Murray)
Newsgroups: comp.std.c
Subject: Re: Does ANSI insist this is legal?
Message-ID: <12570047@hpclwjm.HP.COM>
Date: 1 Mar 90 16:43:26 GMT
References: <25EB8750.5286@paris.ics.uci.edu>
Organization: Hewlett-Packard Calif. Language Lab
Lines: 19

Ronald Guilmette asks:

> Must a strictly conforming ANSI C implementation be able to generate an
> executable program from the following?


>	int main ();
>	short s = (short) &main;
>	char c = (char) &main;
>	int main () { return 0; }

No.  Setting aside the question of whether a pointer can fit in a char
or a short, this code violates Section 3.4:  "Cast operators in an
arithmetic constant expression shall only convert arithmetic types
to arithmetic types, except as part of an operand to the sizeof
operator."

Walter Murray
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