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Re: [perl #23630] problem with "used only once" warning

John Peacock
August 28, 2003 17:36
Re: [perl #23630] problem with "used only once" warning
Message ID:
Fergal Daly wrote:
>         Name "%s::%s" used only once: possible typo
>            (W once) Typographical errors often show up as unique variable
>            names.  If you had a good reason for having a unique name, then
>            just mention it again somehow to suppress the message.  The "our"
>            declaration is provided for this purpose.

+            NOTE: $c and @c are the same variable name for this purpose; if
+            two or more variables with the same name and different prefixes
+            are used only once, it will not trigger this warning.

> speaks about variable names rather than variables but I wonder how many people 
> get that the subtle distinction without finding out the hard way,

How about something like that?  I suppose we could also suggest taking a look at 
an entry describing globs (but that seems like too detailed for a warning).

Personally, I don't think the likelyhood of someone getting bit by this 
particular "thinko" warrants confusing the docs.


John Peacock
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