I've been using the use feature qw( switch ) feature, pretty much since in came out in Perl 5.10. As of v5.18 or so, someone with enough clout, decided that the "smartmatch" feature was experimental, and this given/when construct appears to fall into the "smartmatch" category.
Normally this isn't an issue, as I'm usually writing one-off scripts that tackle a specific task and/or run on identical platforms -- so the same Perl version all around.
I'm currently working on a project that crosses different linux distributions, and therefore different Perl versions. Some (one, actually) before 5.18 and some (most) after (5.20 or so).
The older ones run fine; the newer ones complain that the feature is "experimental". One can disable the warnings on the newer perls by using...
no warnings "smartmatch::expierimental;...but the older perls don't recognize the pragma and fail to run.
So what's the best way to use this case/switch functionality across perl versions without editing my code every time?
(Note: I've tried the Switch module, but it doesn't seem to handle regular expressions very well -- especially with nested blocks.)
Any help appreciated.
TIA
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|
