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All the Perl that's Practical to Extract and Report

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  • Seriously, you did a very good job of putting forth your point of view, and I wish I could simply agree with it. But I can't. Saying that when you ask for a particular version of Perl, you won't get new features, forces anyone implementing new features to have to put a check in their code to detect whether to go with the new or the old version of the feature. This would force the internals to get even more messy than they already are, because you're now maintaining a promise for perfect backwards compatibility. (Rather than just good enough to satisfy tchrist, merlyn, etc.)

    I personally have enough comfort with the judgment calls that are made on backwards compatibility supplied by Perl 5 to continue letting pumpkings decide whether it is better to just give everyone a new feature, or give people the ability to control whether they will see it. Which means that I don't want anyone to be promised that they will only get new features if they specifically ask for them.

    • You make a good point. I think "good enough" backwards compatibility would still work fine though. My main concern is the addition of new pragmas that might be added to be loaded on default.

      When I write use 5.010; I want to get given, when, say, and all the rest. But I don't expect autodie, strict, warnings and other such things to be turned on for me automatically. That could seriously break my code. I really like autodie, but I have some legacy code that does its own error handling. autodie does

      • Jarich, thank you very much for expressing so clearly what it also my point. Yes, we may be "backward compatibility nazis" like some people are saying, but those people should know that for most companies out there, Perl is just like AWK, except more powerful. You expect it to always works the same way you expect the Sun to raise each morning.

        Also, to illustrate what Jarich said, here is a ~250 lines module which is perfectly valid and working Perl code:

        $ perl -c syntax OK

        Now, l

        Close the world. txEn eht nepO