The default layer is C<main>.
-Layers are stored into a global hash, so that when you refer to them by their name, you get the existing layer object.
+Layers are stored into a global hash, so that when you refer to them by their name, you get the existing layer object.
Layers can also be directly applied to sets with the C<< ->layer >> method.
L<Sub::Name>.
-L<Scope::Guard>.
-
L<Math::Complex>, L<Math::Trig>.
L<Scalar::Util>, L<List::Util>, L<Task::Weaken>.