This queue is for tickets about the Devel-Cycle CPAN distribution.

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Id:
109636
Status:
new
Priority:
Low/Low
Queue:

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Owner:
Nobody in particular
Requestors:
ZARQUON [...] cpan.org
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Subject: FEATURE: flag to get standard reporting into scalar for applications that are already using STDOUT
While you could make your own callback, this patch seems useful to me in any case. Comes with a free test.
Subject: report_to_scalar.patch
diff --git a/lib/Devel/Cycle.pm b/lib/Devel/Cycle.pm index 68e93c1..a8d51de 100644 --- a/lib/Devel/Cycle.pm +++ b/lib/Devel/Cycle.pm @@ -20,11 +20,14 @@ our @EXPORT_OK = qw($FORMATTING); our $VERSION = '1.12'; our $FORMATTING = 'roasted'; our $QUIET = 0; +our $REPORT_TO_SCALAR = 0; my %import_args = (-quiet =>1, -raw =>1, -cooked =>1, - -roasted=>1); + -roasted=>1, + -report_to_scalar=>0, +); BEGIN { require constant; @@ -43,31 +46,36 @@ sub import { $FORMATTING = 'roasted' if exists $args{-roasted}; $FORMATTING = 'raw' if exists $args{-raw}; $FORMATTING = 'cooked' if exists $args{-cooked}; + $REPORT_TO_SCALAR = 1 if exists $args{-report_to_scalar}; $self->export_to_level(1,$self,grep {!exists $import_args{$_}} @_); } sub find_weakened_cycle { my $ref = shift; my $callback = shift; + my $report; unless ($callback) { my $counter = 0; $callback = sub { - _do_report(++$counter,shift) + $report .= _do_report(++$counter,shift) } } _find_cycle($ref,{},$callback,1,{},()); + return $report if $REPORT_TO_SCALAR; } sub find_cycle { my $ref = shift; my $callback = shift; + my $report; unless ($callback) { my $counter = 0; $callback = sub { - _do_report(++$counter,shift) + $report .= _do_report(++$counter,shift); } } _find_cycle($ref,{},$callback,0,{},()); + return $report if $REPORT_TO_SCALAR; } sub _find_cycle { @@ -182,12 +190,19 @@ sub _find_cycle_CODE { sub _do_report { my $counter = shift; my $path = shift; - print "Cycle ($counter):\n"; + my $report; + $report .= "Cycle ($counter):\n"; foreach (@$path) { my ($type,$index,$ref,$value,$is_weak) = @$_; - printf("\t%30s => %-30s\n",($is_weak ? 'w-> ' : '')._format_reference($type,$index,$ref,0),_format_reference(undef,undef,$value,1)); + $report .= sprintf("\t%30s => %-30s\n",($is_weak ? 'w-> ' : '')._format_reference($type,$index,$ref,0),_format_reference(undef,undef,$value,1)); + } + $report .=print "\n"; + if (! $REPORT_TO_SCALAR) { + print $report; + } + else { + return $report; } - print "\n"; } sub _format_reference { @@ -420,6 +435,12 @@ illustrated here: use Devel::Cycle -raw; +If you are using Devel::Cycle for an application that's already making use +of STDOUT you can use the -report_to_scalar flag to return the report +rather than having it print or having to tie STDOUT. + + use Devel::Cycle -report_to_scalar; + =head2 Code references (closures) If the PadWalker module is installed, Devel::Cycle will also report


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