Moose：扩展导出器会导致构造函数消失？
这是我无法弄清楚的奇怪事情。我有一个 Moose 类，我还想使用古老的标准 Exporter 模块导出一些常量。但是，一旦我将 extends Exporter 添加到我的类中，出于某种原因，默认的 Moose 构造函数就不再被继承，并且我收到致命错误：
Can't locate object method "new" via package "MyApp::Dispatch"
这是一个演示该问题的简单测试。
package Foo;
use Moose;
use constant NARF => 'poit';
extends 'Exporter';
1;
$ perl -I./lib -MFoo -e '$f=Foo->new'
Can't locate object method "new" via package "Foo" at -e line 1.
删除 extends 行可以使问题消失。
这是使用 Moose 0.93。
Here's something weird that I can't figure out. I have a Moose class that I also want to export some constants, using the age-old standard Exporter module. However, as soon as I add extends Exporter to my class, for some reason, the default Moose constructor no longer gets inherited and I get the fatal error:
Can't locate object method "new" via package "MyApp::Dispatch"
Here is a simple test which demonstrates the problem.
package Foo;
use Moose;
use constant NARF => 'poit';
extends 'Exporter';
1;
$ perl -I./lib -MFoo -e '$f=Foo->new'
Can't locate object method "new" via package "Foo" at -e line 1.
Removing the extends line makes the problem vanish.
This is using Moose 0.93.
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它假设您从另一个基于 Moose 的类继承，因此它不会从 Moose::Object 继承。我不确定标准答案是什么：只需手动添加 Moose::Object 或以某种方式使用 MooseX::NonMoose 或其他东西。
但即使没有继承，Exporter 也能正常工作；只需导入其导入例程：
It is assuming you are inheriting from another Moose-based class, so it doesn't inherit from Moose::Object. I'm not sure what the standard answer would be: just manually adding Moose::Object or somehow using MooseX::NonMoose or something else.
But Exporter works just fine even when not inherited; just import its import routine:
您已经得到了真正的答案，但真正的问题是为什么您有一个导出内容并且是对象的模块？这是一个非常奇怪的设计，并且可能是一种代码味道。
You already got the real answer, but the real question is why do you have a module that exports stuff and is an object? That's a pretty weird design, and may be a code smell.