Redefine EAGAIN and EWOULDBLOCK (they're just perl constants), and rerun that code, after setting $!. (Your code probably isn't written so that is in one callable place, but it could be.)On Sun, Jul 11, 2004 at 10:09:38PM +0200, James Mastros wrote:
All unreachable code is either people misusing the term "unreachable", a bug in Devel::Cover, or dead code that should be removed.
Here's a puzzle, then.
I just ran into a similar "problem" in POE::Driver::SysRW. For portability I have a couple lines similar to
$! = 0 if $! == EAGAIN or $! == EWOULDBLOCK;
EAGAIN and EWOULDBLOCK are identical on most systems. In fact, one is usually defined in terms of the other. They differ on a few platforms, however, and it's important to check both.
This is probably a good example of where it's too silly to force it to test all the possibilities, but it is possible.
You could also consider it a bug in perl's optimizer, which should notice that $a||$a == $a. (But you'd be wrong, as this isn't neccessarly true if $a is magical, and $! is, in fact, magical.)
-=- James Mastros
