Function: deftype

deftype is a for cl-deftype, defined in cl-macs.el.gz.

This macro is obsolete since 27.1; use cl-deftype instead.

Signature

(deftype NAME ARGLIST &rest BODY)

Documentation

Define NAME as a new data type.

The type name can then be used in cl-typecase, cl-check-type, etc.

Aliases

deftype (obsolete since 27.1)