perl - 如何禁用警告？

Question

我有警告:

"my" variable $subject masks earlier declaration in same scope at ...

我知道我可以通过 no warnings 'all' 禁用警告pragma，但找不到 right category对于我的警告类型。

如何仅禁用此类警告？

Answer 1

搜索 perldoc perldiag 为您的警告信息。这个turns up

"%s" variable &%s masks earlier declaration in same %s

(W shadow) A "my", "our" or "state" variable has been redeclared in the current scope or statement, effectively eliminating all access to the previous instance. This is almost always a typographical error. Note that the earlier variable will still exist until the end of the scope or until all closure references to it are destroyed.

它告诉您禁用此特定警告的编译指示是

no warnings 'shadow';