less confusing abstract

[p5sagit/Data-Dumper-Concise.git] / lib / Devel / Dwarn.pm

diff --git a/lib/Devel/Dwarn.pm b/lib/Devel/Dwarn.pm
index 403c742..bb1b0a8 100644 (file)
--- a/lib/Devel/Dwarn.pm
+++ b/lib/Devel/Dwarn.pm
@@ -1,9 +1,132 @@
 package Devel::Dwarn;
 
-use Data::Dumper::Concise::Sugar ();
+use Data::Dumper::Concise::Sugar;
 
 sub import {
   Data::Dumper::Concise::Sugar->export_to_level(1, @_);
 }
 
+=head1 NAME
+
+Devel::Dwarn - Combine warns and Data::Dumper::Concise
+
+=head1 SYNOPSIS
+
+  use Devel::Dwarn;
+
+  return Dwarn some_call(...)
+
+is equivalent to:
+
+  use Data::Dumper::Concise;
+
+  if (wantarray) {
+     my @return = some_call(...);
+     warn Dumper(@return);
+     return @return;
+  } else {
+     my $return = some_call(...);
+     warn Dumper($return);
+     return $return;
+  }
+
+but shorter. If you need to force scalar context on the value,
+
+  use Devel::Dwarn;
+
+  return DwarnS some_call(...)
+
+is equivalent to:
+
+  use Data::Dumper::Concise;
+
+  my $return = some_call(...);
+  warn Dumper($return);
+  return $return;
+
+If you need to force list context on the value,
+
+  use Devel::Dwarn;
+
+  return DwarnL some_call(...)
+
+is equivalent to:
+
+  use Data::Dumper::Concise;
+
+  my @return = some_call(...);
+  warn Dumper(@return);
+  return @return;
+
+If you want to label your output, try DwarnN
+
+  use Devel::Dwarn;
+
+  return DwarnN $foo
+
+is equivalent to:
+
+  use Data::Dumper::Concise;
+
+  my @return = some_call(...);
+  warn '$foo => ' . Dumper(@return);
+  return @return;
+
+If you want to output a reference returned by a method easily, try $Dwarn
+
+ $foo->bar->{baz}->$Dwarn
+
+is equivalent to:
+
+  my $return = $foo->bar->{baz};
+  warn Dumper($return);
+  return $return;
+
+If you want to immediately die after outputting the data structure, every
+Dwarn subroutine has a paired Ddie version, so just replace the warn with die.
+For example:
+
+ DdieL 'foo', { bar => 'baz' };
+
+=head1 TIPS AND TRICKS
+
+=head2 global usage
+
+Instead of always just doing:
+
+  use Devel::Dwarn;
+
+  Dwarn ...
+
+We tend to do:
+
+  perl -MDevel::Dwarn foo.pl
+
+(and then in the perl code:)
+
+  ::Dwarn ...
+
+That way, if you leave them in and run without the C<< use Devel::Dwarn >>
+the program will fail to compile and you are less likely to check it in by
+accident.  Furthmore it allows that much less friction to add debug messages.
+
+=head2 method chaining
+
+One trick which is useful when doing method chaining is the following:
+
+  my $foo = Bar->new;
+  $foo->bar->baz->Devel::Dwarn::DwarnS->biff;
+
+which is the same as:
+
+  my $foo = Bar->new;
+  (DwarnS $foo->bar->baz)->biff;
+
+=head1 SEE ALSO
+
+This module is really just a shortcut for L<Data::Dumper::Concise::Sugar>, check
+it out for more complete documentation.
+
+=cut
+
 1;