Before I started with perl I had a small intermezzo with Eiffel. In that fine programming language "design by contract" is one of the design philosophies. The "contracts" are assertions as described by ady, with the nice addition that assertions on methods are actually inherited.

So I miss assertions in perl a bit, but I am too lazy (and too concerned with not introducing dependencies) to use some dedicated modules for it.

My current usage of assertions is mostly limited to 

use Carp qw(confess);
...
confess "assertion description" unless $condition

[download]

It's a bit sad that Devel::Cover "punishes" the usage of assertions by default if you find no way to trigger it (and unless you tell Devel::Cover to ignore that line, which could also do).

So to me it seems that all the tools are in place, but either aren't easy accessible, or (more likely) I'm too lazy to use them properly.

In reply to Re: Your use of assertions in Perl ? by moritz
in thread Your use of assertions in Perl ? by ady

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.