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Re: How we deprecate (was Re: Deprecating '\w {' in v5.16)

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January 31, 2012 07:40
Re: How we deprecate (was Re: Deprecating '\w {' in v5.16)
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On 31 January 2012 16:19, Nicholas Clark <> wrote:
> On Tue, Jan 31, 2012 at 04:02:59PM +0100, demerphq wrote:
>> Hash of lines + warning message (format or something).
> I first thought "optree - that's a bugger, that's read only" and then
> considered that an interpreter-based hash of script filename and line
> would work. But it still felt hackish.
> (Even if I decided that people who had used #line directives to have the
> same line appear more than once were on their own.)
> I think you're right with using the format string - I'd not thought of that,
> and it's possible that more than one warning might come from a complex
> construction at different times. (Given that some of the warnings are run-
> time based on the data)
> I suspect that "address of current op" is a cheaper thing to store than
> "file plus line". That plus format should be good enough.

Ah, nice refinement. I hadn't thought of using the opcode address at all. :-)


perl -Mre=debug -e "/just|another|perl|hacker/"

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