asdf-readtables

Defsystem with specified readtable

(asdf-readtables:defsystem/readtable :foo
  :readtable :foo
  ...)

==>
(ASDF/DEFSYSTEM:DEFSYSTEM :FOO
  :DEFSYSTEM-DEPENDS-ON (:NAMED-READTABLES)
  :CLASS ASDF-READTABLES:SYSTEM/READTABLE
  :READTABLE :FOO
  ...)

Change readtable and reload system

(change-class (asdf:find-system :bar)
              'asdf-readtables:system/readtable
              :readtable :bar)

Get back to normal readtable.

(change-class (asdf:find-system :bar) 'asdf:system)