Following in Ovid's footsteps, I'm trying to remove boilerplate from my code. I'm generally happy with the result, but for warnings.

I have a module with an import method. It's only purpose is to enable strict and warnings and a few other pragmas. But, I don't want it to enable all warnings, and this is where I'm a bit stumped. 

package Foo;

# lots of use statements here.
use Import::Into;

sub import {
    my $target = caller;
    'strict'->import::into($target);
    'warnings'->import::into($target, qw(FATAL utf8));
    if ($] >= 5.017011) {
        # THIS IS THE PROBLEM LINE
        'warnings'->unimport::out_of($target, 'experimental::smartmatc
+h');
    }
}

[download]

The problem is 'warnings'->unimport::out_of($target, 'experimental::smartmatch'); turns off all warnings, not just the one I want.

unimport::out_of() is calling warnings->unimport('experimental::smartmatch'); - which I think is the same as calling no warnings 'experimental::smartmatch';. But it isn't working.

So how do enable warnings (except one) via an import sub?

update: This is Perl 5.18.1. I also fixed some formatting.

In reply to Selectively importing warnings by coolmichael

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.