The common idiom for self init (below) causes a double-call when
compiling with --advanced, resulting in an incorrect retain count.
if (!(self = [super init])) {
return nil;
}
This is a nice feature found in fteqcc (also a bit of a challenge from
Spike). Getting bison to accept the new expression required rewriting the
state expression grammar, so this is mostly for the state expression. A
test to ensure the state expression doesn't break is included.
