什么是 experimental::private_use?

What is experimental::private_use?

perldoc perlwarn 中有一个特殊类别 experimental::private_useprivate_use 这是什么警告?

目前,这仅记录在 perldiag

The `private_use` feature is `experimental`
(S `experimental::private_use`) This feature is actually a hook for future use.

我认为是 likely something to do with unicode, which seems to have Private Use Areas

this commit添加,解释如下:

I am starting to write a Unicode::Private_Use module which will allow one to specify the Unicode properties of private use code points, thus making them actually useful. This commit adds a hook to regcomp.c to accommodate this module. The changes are pretty minimal. This way we don't have to wait another release cycle to get it out there.

I don't want to document this interface, until it's proven.

目前,该功能用于解析\p{}\P{}内部的函数。