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Modifying constructor for regex-backref structures.
(change-regex-backref x
[:index <index>])
This is an often useful alternative to make-regex-backref.
We construct a new regex-backref structure that is a copy of
This is an ordinary
Macro:
(defmacro change-regex-backref (x &rest args) (std::change-aggregate 'regex-backref x args '((:index . regex-backref->index)) 'change-regex-backref 'nil))