Michael Meskes <mes...@postgresql.org> writes:
> On Mon, May 25, 2009 at 11:27:27AM -0400, Tom Lane wrote:
>> You can't just remove the "else", or it's unsafe;
> But why? What does this empty else accomplish?
Consider
if (...)
macro;
else
something-else;
Without the "else" in the macro, this code would be parsed
in a surprising fashion, ie else bound to the wrong if.
I'm afraid that "else {}" might not be any better --- it
might fail outright in this context.
[ thinks for a bit... ] What might be both safe and warning-free
is to code an explicit empty statement, viz macro body as
if (1) { ... } else ((void) 0)
regards, tom lane
--
Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-hackers
