Re^2: "scalar found where operator expected" while printing to a glob ref

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Re^3: "scalar found where operator expected" while printing to a glob ref by AnomalousMonk (Archbishop) on Mar 01, 2016 at 18:25 UTC
Further to Eily's post: Instead of `print $$self $data;` try `print { $$self } $data;` (untested). Give a man a fish: `<%-{-{-{-<`	[reply] [d/l] [select]
Re^4: "scalar found where operator expected" while printing to a glob ref by seki (Monk) on Mar 01, 2016 at 21:36 UTC
Yes, the block returning the dereferenced file handle is doing the job. Even if it is not very explicit in the documentation, it is suggested in the last paragraph.	[reply]
Re^3: "scalar found where operator expected" while printing to a glob ref by Eily (Monsignor) on Mar 02, 2016 at 08:16 UTC
It does seem so, but I couldn't find that piece of code in XML::SAX::Writer, which is not really surprising since this is a syntax error, not just a warning.	[reply]
Re^4: "scalar found where operator expected" while printing to a glob ref by seki (Monk) on Mar 02, 2016 at 13:18 UTC
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; $$self .= uc shift; }` [download] and I have adapted it to my needs: replacing the string scalar to store the data by a file handle. Thus I am responsible for `print $$self $data;`. Actually I was surprised for not having the warning while using the stock module... Mea culpa.	[reply] [d/l] [select]
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]