|P is for Practical|
Re: Data::Diver polluting $!by roboticus (Canon)
|on Nov 01, 2012 at 12:23 UTC||Need Help??|
The documentation, in the $! section, states:
$! If used numerically, yields the current value of the C "errno" variable, or in other words, if a system or library call fails, it sets this variable. This means that the value of $! is meaningful only immediately after a failure...
A bit earlier, just after the Error Variables heading, it mentions that:
The variables $@, $!, $^E, and $? contain information about different types of error conditions ... They correspond to errors detected by the Perl interpreter, C library, operating system, or an external program, respectively.
So the long and short of it is that using the value of $! at any time other than just after a failed operation involving the C library is a bug.
When your only tool is a hammer, all problems look like your thumb.