in reply to use _specific_ version

I think the following will work with any version of Perl 5: 
BEGIN {
  require 5.004;
  die "Requires only 5.004" if int($] * 1000) > 5004;
}

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update: why bother with the require, either? Just use the die and !=

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Re: Re: use _specific_ version
by particle (Vicar) on Jul 09, 2001 at 19:40 UTC
    yes. this makes sense to me. is there good reason to use require inside 'BEGIN', or is use okay as well? i'm not sure of the subtle differences.

    ~Particle

[reply]
      I believe that in this case, the import is skipped, so: use 5.004; is the same as BEGIN { require 5.004 }

      You want to check inside a begin block, anyway, so you do as little as possible with the wrong Perl.

      Note also that the version number could have more information; 5.6.1 is encoded as 5.006001 in $]. If you care about 5.6.0 vs 5.6.1, you need to multiply by 1000000 first and compare with the right number.

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