Document 1- and 0- arg variants of &[∘]

Raku · Mar 16, 2018 · fe8961d · masak · Mar 16, 2018 · zoffixznet
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commit fe8961d
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diff --git a/doc/Language/operators.pod6 b/doc/Language/operators.pod6
@@ -1213,6 +1213,15 @@ Both C<.count> and C<.arity> of the RHS will be maintained.
     say f |g 'abc';
     =end code
 
+The single-arg candidate returns the given argument as is. The zero-arg candidate
+returns an identify routine that simply returns its argument.
+
+    my &composed = [∘] &uc;
+    say composed 'foo'; # OUTPUT: «FOO␤»
+
+    my &composed = [∘];
+    say composed 'foo'; # OUTPUT: «foo␤»
+
 =head1 Junctive AND (all) Precedence
 
 =head2 infix C«&»