在编写Perl模块时，是否必须在所有方法中专门检查对象实例? [英] When writing a Perl module, do I have to specifically check for an object instance in all my methods?

问题描述

我正在编写一个具有几种方法的模块.让我们考虑一下:

I'm writing a module that has several methods. Let's consider this :

package MyPackage;
sub new {
 ...
}

sub do_your_job {
 ...
}
1;

如何阻止某人像MyPackage->do_your_job而不是$obj->do_your_job那样呼叫do_your_job?我是否需要检入将引用作为第一个参数的每个方法?

What is to stop someone calling do_your_job like MyPackage->do_your_job instead of $obj->do_your_job ? Do I need to check in every method that I'm receiving a reference as the first argument?

推荐答案

否.如果您的模块仅包含最少量的文档，则应该清楚do_your_job是需要在对象上调用的方法.如果有人想用其他方式打电话给他，这是他的错误.

No. If your module features only the most minimal documentation, it should be clear from that that do_your_job is a method that needs to be called on an object. If someone wants to call that in some other way, it's his fault.

当然，您可以检查方法的第一个参数是否是受祝福的对象.但这至少有两个缺点:您会损失一点性能，并且使用的代码实际上无法执行方法名称所承诺的任何事情，会使您的方法变得混乱.

Of course, you could check whether the first parameter to your method is a blessed object. But this has at least two drawbacks: You lose a little bit of performance and you clutter your methods with code that really doesn't do anything promised by the method's name.

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