Well, I am not sure why you would want to do that. If you are trying to capture DBI warnings/errors, you can give the DBI handle an error handler:

$h->{RaiseError} = 1; # Turn all warnings into dies
$h->{HandleError} = sub { set_dberror(join('',@_)) };

[download]

Any errors generated by the dbh will be passed to your sub.

If you really want to capture capture all warning for specific modules, you might try:

package TrapWarnings;

my %Modules;
BEGIN { $SIG{__WARN__} = \ &trapWarning; }

sub import {
     $Modules{caller} = 1;
}

sub trapWarning {
     my $caller = caller 1;
     if ($Module{$caller}) {
          set_dberror(join('',@_))
     } else {
          warn @_
     }
}

# Example use

package Foo;

use TrapWarnings;

warn "foo";

[download]

Well that code is completely untested. The general idea is everytime you import your TrapWarnings package, it adds that package to the list of packages to trap warnings for. When a warn happens, it checks the original caller to see if its package is in the list. If so, it traps it, otherwise, just re-warns it.

This is far from ideal, but with creative use of the Carp module you might get where you want to be.

Ted Young

($$<<$$=>$$<=>$$<=$$>>$$) always returns 1. :-)

In reply to Re: Problem of scope : $SIG{__WARN__} in a module... by TedYoung
in thread Problem of scope : $SIG{__WARN__} in a module... by wazoox

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.