Errin Larsen wrote:
> Hi Perlers,
>
> I've seen a lot of tutorial or example code dealing with the POSIX
> module that does something like this:
>
> use POSIX ':sys_wait_h';
>
> What does the ':' mean/do in the above line?
It's called a "tag" and is typically used to import a "basket" of symbols.
See "perldoc Exporter", under the heading "Specialised Import Lists"
For some reason this isn't documented in my copy of POSIX. But you can see
the symbols exported by running:
$ perl -MPOSIX -le 'print for @{$POSIX::EXPORT_TAGS{sys_wait_h}}'
WEXITSTATUS
WIFEXITED
WIFSIGNALED
WIFSTOPPED
WNOHANG
WSTOPSIG
WTERMSIG
WUNTRACED
(your system may show different values)
--
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
<http://learn.perl.org/> <http://learn.perl.org/first-response>
