我有以下代码
print "Starting..\n";
eval { die "Before die sub redefinition\n" };
#die "Before die sub redefinition\n";
BEGIN {
print "inside Begin block\n";
*CORE::GLOBAL::die = sub {
my ($message) = @_;
print "Message: " . $message ."\n";
}
}
eval { die "Right after begin block\n" };
print "done\n";
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输出如下,
inside Begin block
Starting..
Message: Right after begin block
done
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BEGIN块在任何其他语句之前首先执行;但是重新定义的CORE::Global::die只有在重新定义后才有效。Firstdie不使用重新定义的版本,而是使用原始版本。有人可以帮我找出原因吗?