(volatile) foo

[Alan Mycroft]

In article <1989Sep17.180722.21889 at light.uucp> bvs at light.UUCP (Bakul Shah) writes:
>Is the following legal?
>	char * foo;
>	while ((volatile)foo) continue;
>
Sadly, it is legal, although it has a different effect from what many
uninitiates would expect.  It loads foo as a non-volatile variable then casts
it to an int (volatile is ignored except on lvalues which casts are not).

Perhaps good compilers would give warnings for such....