+=head2 C<localize_delete $what, $key, $context>
+
+Similiar to L</localize>, but for deleting variables or array/hash elements.
+C<$what> can be:
+
+=over 4
+
+=item *
+
+A glob, in which case C<$key> is ignored and the call is equivalent to C<local *x>.
+
+=item *
+
+A string beginning with C<'@'> or C<'%'>, for which the call is equivalent to respectiveley C<local $a[$key]; delete $a[$key]> and C<local $h{$key}; delete $h{$key}>.
+
+=item *
+
+A string beginning with C<'&'>, which more or less does C<undef &func> in the upper scope.
+It's actually more powerful, as C<&func> won't even C<exists> anymore.
+C<$key> is ignored.
+
+=back
+
+=head2 C<unwind @values, $context>
+
+Returns C<@values> I<from> the context pointed by C<$context>, i.e. from the subroutine, eval or format just above C<$context>.
+
+The upper context isn't coerced onto C<@values>, which is hence always evaluated in list context.
+This means that
+
+ my $num = sub {
+ my @a = ('a' .. 'z');
+ unwind @a => HERE;
+ }->();
+
+will set C<$num> to C<'z'>.
+You can use L</want_at> to handle these cases.
+
+=head2 C<want_at $context>
+
+Like C<wantarray>, but for the subroutine/eval/format just above C<$context>.
+
+The previous example can then be "corrected" :
+
+ my $num = sub {
+ my @a = ('a' .. 'z');
+ unwind +(want_at(HERE) ? @a : scalar @a) => HERE;
+ }->();