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Postings from July 2020
On Fri, 03 Jul 2020 19:22:03 +0200, demerphq <demerphq@gmail.com> wrote: > On Tue, 30 Jun 2020 at 13:37, Paul "LeoNerd" Evans > <leonerd@leonerd.org.uk> wrote: >> >> On Tue, 30 Jun 2020 12:02:10 +0200 >> Salvador Fandiño <sfandino@gmail.com> wrote: >> >> > It you want to avoid the "use v7;" line, then you should be able to >> > tell perl explicitly in some way you want the 7 semantics. The only >> > sane way I can see for that, is using different file terminations. >> > I.e. p7, pl7, pm7, t7. >> > >> > And when perl 8 comes out, you can switch to p8, pl8, etc. >> >> This would be an odd suggestion. >> >> I believe the main motivation for people saying they don't want to >> "use v7" is precisely to avoid having to update to "use v8" and so on >> in the future; having to chase the latest-and-greatest by making a >> single character change to their code every decade or so. > > Personally I do not see that or pleasing those people as the reason > for doing it. > > I see it as simply providing a new answer to what version perl is > expecting when it starts parsing. Eg, all the stuff "above" the use > statement. > > As long as the rule is "perl 5" variant, we have a problem that anyone > create a document that is a mix of a 5 and something else. > > We want to eventually ditch the perl 5 variant, and move to a saner > perl 7 or 8 variant, which means that ast some point we want the > parser to not know about 5 AT ALL, except when it throws exceptions. > Making the rule be "the parser starts out expecting perl 5" simply > does not make sense, for *any* version. Making the rule be "the parser > starts out expecting perl $Latest" does. > > The people that use this to get the latest version are just making > their lives difficult. Nobody sane should do it on purpose. That circles back to the question of what you envision to happen in the future with unversioned perl 5 code. (Language fork, empower modules@, frankenstein via CPAN.pm, etc..) It also is completely orthogonal to the question of use 7; being mandatory or not. (You can still have it parse it as perl 7, and fail with ETOOVAGUE at a lack of version at end of parse or before any other parse error is thrown.) -- With regards, Christian WaldeThread Previous | Thread Next