optics-0.4: Optics as an abstract interface

Index - <

<%Optics, Optics.Indexed
<%=Optics.State.Operators
<%>Optics, Optics.Indexed
<&>Optics, Optics.Optic
<.=Optics.State.Operators
<<%=Optics.State.Operators
<<.=Optics.State.Operators
<<?=Optics.State.Operators
<?=Optics.State.Operators
<|Optics, Optics.Cons