如果生成警告，如何使Perl死掉? [英] How can I make Perl die if a warning is generated?

问题描述

我希望我的脚本perl在生成警告(包括用过的软件包所生成的警告)时死掉.

I would like my script perl to die whenever a warning is generated, including warnings which are generated by used packages.

例如，这应该死:

use strict;
use warnings;
use Statistics::Descriptive;

my @data = ( 8, 9, 10, "bbb" );
my $stat = Statistics::Descriptive::Full->new();
$stat->add_data(@data);

use warnings FATAL => 'all';将无济于事，因为它在词法范围内. Test :: NoWarnings 也不起作用，因为它不会杀死脚本.

use warnings FATAL => 'all'; won't help since it's lexically scoped. Test::NoWarnings also doesn't do the work since it doesn't kill the script.

推荐答案

要添加到rafl的答案:在向%SIG添加处理程序时，(通常)最好不要覆盖以前的任何处理程序，而是在执行后调用它您的代码:

To add to rafl's answer: when adding a handler to %SIG, it is (usually) better to not overwrite any previous handler, but call it after performing your code:

my $old_warn_handler = $SIG{__WARN__};
$SIG{__WARN__} = sub {

    # DO YOUR WORST...

    $old_warn_handler->(@_) if $old_warn_handler;
};

(这也适用于信号处理程序，例如$SIG{HUP}，$SIG{USR1}等.您 永远不知道是否有其他软件包(甚至是您"的另一个实例) 设置仍需要运行的处理程序.)

(This also applies to signal handlers like $SIG{HUP}, $SIG{USR1}, etc. You never know if some other package (or even another instance of "you") already set up a handler that still needs to run.)

这篇关于如果生成警告，如何使Perl死掉?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！