-null declarator indicates an abstract declarator; that is, one which does not
-declare any identifier. Such declarators appear in type names and possibly
-function parameters. An identifier declarator has the obvious meaning; the
+null declarator is not strictly a C language construct, but is used by
+.Nm
+to indicate an abstract declarator; that is, one which does not declare any
+identifier. Such declarators appear in type names and possibly function
+parameters. An identifier declarator has the obvious meaning; the