Document some more Set operators

Author: Mouq

lib/Set.pod

@@ -69,20 +69,62 @@ not contain C<$b>.
 
 =head2 infix:<(|)>
 
+    only sub infix:<(|)>(**@p)
+
+Returns the union of all of its arguments. Unless any of its arguments
+are L<Baggy>, this creates a new C<Set> that contains all the elements
+its arguments contain.
+
 =head2 infix:<∪>
 
+    only sub infix:<<"\x222A">>(|p)
+
+Equivalent to L<(|)>.
+
 =head2 infix:<(&)>
 
+    only sub infix:<(&)>(**@p)
+
+Returns the intersection of all of its arguments. Unless any of its
+arguments are L<Baggy>, this creates a new C<Set> that contains only the
+elements that all of its arguments contain.
+
 =head2 infix:<∩>
 
+    only sub infix:<<"\x2229">>(|p)
+
+Equivalent to L<(&)>.
+
 =head2 infix:<(-)>
 
+    only sub infix:<(-)>(**@p)
+
+Unless the first argument is L<Baggy>, returns the C<Set> made up all
+the elements the first argument has but the rest don't, i.e., of all the
+elements of the first argument, minus the elements from the other
+arguments.
+
 =head2 infix:<∖>
 
+    only sub infix:<<"\x2216">>(|p)
+
+Equivalent to L<(-)>.
+
 =head2 infix:<(^)>
 
+    multi sub infix:<(^)>(Any $a, Any $b --> Setty)
+    multi sub infix:<(^)>(Set $a, Set $b --> Setty)
+
+Returns the C<Set> made up of all the elements that $a has but $b
+doesn't and all the elements $b has but $a doesn't. Equivalent to
+C<($a ∖ $b) ∪ ($b ∖ $a)>.
+
 =head2 infix:<⊖>
 
+    only sub infix:<<"\x2296">>($a, $b --> Setty)
+
+Equivalent to L<(^)>
+
 =head2 infix:<(<=)>
 
 =head2 infix:<⊆>