Comments on: Watch out for side effects with `use VERSION` http://www.effectiveperlprogramming.com/blog/396 Effective Perl Programming - write better, more idiomatic Perl Wed, 28 Dec 2011 08:06:47 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: Brad Gilbert http://www.effectiveperlprogramming.com/blog/396/comment-page-1#comment-21 Brad Gilbert Fri, 16 Jul 2010 04:56:38 +0000 http://www.effectiveperlprogramming.com/?p=396#comment-21 There has been some talk on P5P of changing the way `use 5.xxx` works, so that it gets converted at compile time to `BEGIN { require 5.xxx; require feature; feature->import("5.x"); }` or the roughly equivalent `BEGIN{ require 5.xxx; $^H{'feature_unicode'} = q(1); $^H{'feature_say'} = q(1); $^H{'feature_state'} = q(1); $^H{'feature_switch'} = q(1); } This is arguably how it should have been implemented to start with. There has been some talk on P5P of changing the way `use 5.xxx` works, so that it gets converted at compile time to `BEGIN { require 5.xxx; require feature; feature->import(“5.x”); }` or the roughly equivalent `BEGIN{ require 5.xxx; $^H{‘feature_unicode’} = q(1); $^H{‘feature_say’} = q(1); $^H{‘feature_state’} = q(1); $^H{‘feature_switch’} = q(1); }

This is arguably how it should have been implemented to start with.

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