Re^4: "scalar found where operator expected" while printing to a glob ref

Well, I've just checked and it is not the actual package code.
I remember now that I found the example of custom ConsumerInterface in the documentation of XML::SAX::Writer

    sub output {
        my $self = shift;
        $$self .= uc shift;
    }
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and I have adapted it to my needs: replacing the string scalar to store the data by a file handle. Thus I am responsible for print $$self $data;. Actually I was surprised for not having the warning while using the stock module... Mea culpa.

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Re^5: "scalar found where operator expected" while printing to a glob ref by MidLifeXis (Monsignor) on Mar 03, 2016 at 18:30 UTC
What line 3 (`$$self .= uc shift`) is saying (just for those not understanding the above code) is that it dereferences the thingy that $self points to, and appends the upper cased version of the next parameter to thingy, putting the results back into thingy. --MidLifeXis	[reply] [d/l]