allow an integer target to refer to a specific caller level, including file/line

[p5sagit/Import-Into.git] / lib / Import / Into.pm

diff --git a/lib/Import/Into.pm b/lib/Import/Into.pm
index 0886ad8..59c861b 100644 (file)
--- a/lib/Import/Into.pm
+++ b/lib/Import/Into.pm
@@ -3,18 +3,31 @@ package Import::Into;
 use strict;
 use warnings FATAL => 'all';
 
-our $VERSION = '1.000002'; # 1.0.2
+our $VERSION = '1.001001'; # 1.1.1
 
 my %importers;
 
+sub _importer {
+  my $target = shift;
+  my ($package, $file, $line) = $target =~ /[^0-9]/ ? ($target) : caller($target + 1);
+  my $code = qq{package $package;\n}
+    . ($file ? "#line $line \"$file\"\n" : '')
+    . 'sub { my $m = splice @_, 1, 1; shift->$m(@_) };'."\n";
+  my $sub = \(eval $code
+    or die "Couldn't build importer for $package: $@");
+  $importers{$target} = $sub
+    unless $file;
+  $sub;
+}
+
 sub import::into {
   my ($class, $target, @args) = @_;
-  $class->${\(
-    $importers{$target} ||= eval qq{
-      package $target;
-      sub { shift->import(\@_) };
-    } or die "Couldn't build importer for $target: $@"
-  )}(@args);
+  $class->${_importer($target)}(import => @args);
+}
+
+sub unimport::out_of {
+  my ($class, $target, @args) = @_;
+  $class->${_importer($target)}(unimport => @args);
 }
 
 1;
@@ -61,6 +74,14 @@ C<import::into> on it. This is a global method, and is callable on any
 package (and in fact on any object as well, although it's rarer that you'd
 want to do that).
 
+Finally, we also provide an C<unimport::out_of> to allow the exporting of the
+effect of C<no>:
+
+  # unimport::out_of was added in 1.1.0 (1.001000)
+  sub unimport {
+    Moose->unimport::out_of(scalar caller); # no MyThing == no Moose
+  }
+
 If how and why this all works is of interest to you, please read on to the
 description immediately below.
 
@@ -164,6 +185,12 @@ you're receiving this from a parameter, I recommend using L<Module::Runtime>:
 
 And that's it.
 
+=head1 ACKNOWLEDGEMENTS
+
+Thanks to Getty for asking "how can I get C<< use strict; use warnings; >>
+turned on for all consumers of my code?" and then "why is this not a
+module?!".
+
 =head1 AUTHOR
 
 mst - Matt S. Trout (cpan:MSTROUT) <mst@shadowcat.co.uk>