| warnings - Perl pragma to control optional warnings |
warnings - Perl pragma to control optional warnings
use warnings;
no warnings;
use warnings "all";
no warnings "all";
use warnings::register;
if (warnings::enabled()) {
warnings::warn("some warning");
}
if (warnings::enabled("void")) {
warnings::warn("void", "some warning");
}
if (warnings::enabled($object)) {
warnings::warn($object, "some warning");
}
warnings::warnif("some warning");
warnings::warnif("void", "some warning");
warnings::warnif($object, "some warning");
If no import list is supplied, all possible warnings are either enabled or disabled.
A number of functions are provided to assist module authors.
Return TRUE if that warnings category is enabled in the calling module. Otherwise returns FALSE.
$category, is enabled in the
calling module.
Otherwise returns FALSE.
$object, as the
warnings category.
Return TRUE if that warnings category is enabled in the first scope where the object is used. Otherwise returns FALSE.
$message to STDERR.
Use the warnings category with the same name as the current package.
If that warnings category has been set to ``FATAL'' in the calling module then die. Otherwise return.
$message to STDERR.
If the warnings category, $category, has been set to ``FATAL'' in the
calling module then die. Otherwise return.
$message to STDERR.
Use the name of the class for the object reference, $object, as the
warnings category.
If that warnings category has been set to ``FATAL'' in the scope where $object
is first used then die. Otherwise return.
if (warnings::enabled())
{ warnings::warn($message) }
if (warnings::enabled($category))
{ warnings::warn($category, $message) }
if (warnings::enabled($object))
{ warnings::warn($object, $message) }
See Pragmatic Modules in the perlmodlib manpage and the perllexwarn manpage.
| warnings - Perl pragma to control optional warnings |