add with.pm to extras

diff --git a/lib/with.pm b/lib/with.pm
new file mode 100644 (file)
index 0000000..28055b4
--- /dev/null
+++ b/lib/with.pm
@@ -0,0 +1,38 @@
+package with;
+
+# This must be its own dist later
+
+use strict;
+use warnings;
+use if $] < '5.010', 'MRO::Compat';
+use mro;
+
+my $comp = 'A001';
+
+sub components {
+  my ($inv, @comp) = @_;
+  my $class = ref($inv) || $inv;
+  my $new_class = join('::', $class, $comp++);
+  require Class::C3::Componentised;
+  my @comp_classes = map +(/^\+(.+)$/ ? "${class}::$1" : $_), @comp;
+  Class::C3::Componentised->ensure_class_loaded($_) for @comp_classes;
+  Class::C3::Componentised->inject_base(
+    $new_class,
+    @comp_classes, $class,
+  );
+  return $new_class unless ref($inv);
+  return bless($inv, $new_class);
+}
+
+sub roles {
+  my ($inv, @roles) = @_;
+  my $class = ref($inv) || $inv;
+  require Role::Tiny;
+  my $new_class = Role::Tiny->create_class_with_roles($class,
+    map +(/^\+(.+)$/ ? "${class}::$1" : $_), @roles
+  );
+  return $new_class unless ref($inv);
+  return bless($inv, $new_class);
+}
+
+1;