Devel::SummarizedWarnings - Causes warnings to be summarized

 use Devel::SummarizedWarnings;
 use warnings;

 for ( 0 .. 10 ) {
     $k = 0 + undef . $_;
 }

 $k = 1 + undef . $_;

 warn "Seagulls!\n";

produces the output

 Warning: Use of "undef" without parens is ambiguous on lines 5 and 8
 Use of uninitialized value in addition (+) on lines 5 (x11) and 8
 Use of uninitialized value in concatenation (.) or string on line 8
 Seagulls!

instead of

 Warning: Use of "undef" without parens is ambiguous at w.pl line 5.
 Warning: Use of "undef" without parens is ambiguous at w.pl line 8.
 Use of uninitialized value in addition (+) at w.pl line 5.
 Use of uninitialized value in addition (+) at w.pl line 5.
 Use of uninitialized value in addition (+) at w.pl line 5.
 Use of uninitialized value in addition (+) at w.pl line 5.
 Use of uninitialized value in addition (+) at w.pl line 5.
 Use of uninitialized value in addition (+) at w.pl line 5.
 Use of uninitialized value in addition (+) at w.pl line 5.
 Use of uninitialized value in addition (+) at w.pl line 5.
 Use of uninitialized value in addition (+) at w.pl line 5.
 Use of uninitialized value in addition (+) at w.pl line 5.
 Use of uninitialized value in addition (+) at w.pl line 5.
 Use of uninitialized value in addition (+) at w.pl line 8.
 Use of uninitialized value in concatenation (.) or string at w.pl line 8.
 Seagulls!

This module traps all warnings and summarizes them when the your perl script exits. Warning trapping can be interrupted and resumed by removing/installing the Devel::SummarizedWarnings::append_to_warning_log handler into $SIG{'__WARN__'}.

Trapped warnings are stored in @Devel::SummarizedWarnings::LOGGED_WARNINGS.

Joshua b. Jore <jjore@cpan.org>