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copied!<blockquote> <p>Has the entire "switch" feature become experimental? </p> </blockquote> <p>No. It has always been.</p> <p>Upd: Oh wow, maybe I'm wrong. I can't find a mention of that in 5.10.0 or .1. Maybe it wasn't? Or maybe they forgot to note it? Either way, it seems they messed up worse than I thought if so! But based on what I've seen since, I think the lesson was learned. (e.g. I still think <code>values $ref</code> is a bad idea, but at least it was marked experimental from day 1.)</p> <blockquote> <p>Are there parts of it I can rely on using without future versions of Perl breaking my code?</p> </blockquote> <p>Technically, no, although the devs are always careful when it comes to backwards compatibility.</p> <blockquote> <p>In general, what is the policy toward changing stable features to experimental?</p> </blockquote> <p>I don't see that ever happening. The deprecation process would be used instead.</p> <hr> <p>Changes so far:</p> <ul> <li><p><code>given</code> is changing from creating a lexical <code>$_</code> to localising <code>$_</code> like foreach loops in 5.18 (or did it already happen in 5.16?).</p></li> <li><p>5.10.1 saw some big changes in smart-matching*. Don't use (smart-matching in) 5.10.0.</p></li> </ul> <p>Possible future changes:</p> <ul> <li>The behaviour of smart-matching* is still a hot topic.</li> </ul> <p>* — True, this is a feature distinct from given-when, but it's the same or closely related in most people's minds.</p>

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