I have a program which needs to run on Windows and Linux. Most of the code works unchanged on both systems. Only a few sub's are different. There are several solutions for approaching this problems, and I will outline those I have found, below, but since I'm not fully happy with all of them, I'm posting here - maybe someone propses a solution which is more clever than mine.
- I could inside the function distinguish, on which platform I'm running:
sub f {
if($^O =~ /Win/) { .... } else { ... }
}
-
I could use subrefs instead of subs:
my $f = if($^O =~ /Win/) ? sub { ... } else { ... };
or use a singleton class which bundles the respective subs.
-
I could package the subs into two modules, and do a
use if .... to load one module or the other, depending on the platform.
The last approach seems to me the most elegant, but also the one which is the most complicated (currently, my fairly simple program fits into one file, while with this approach, I would need 3 files). Not really bad, but I wonder, if there is an equally good, or even better, solution, which is simpler. If Perl would have conditional compilation, I would write something like:
# Not real Perl code right now!
IF ....
sub f { .... }
sub g { .... }
ELSE
sub f{ ... }
sub g { ... }
END
--
Ronald Fischer <ynnor@mm.st>
-
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.
|