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| ANSI Common Lisp 22 Printer 22.1 The Lisp Printer 22.1.3 Default Print-Object Methods ### 22.1.3.13 Printing Other Objects Other objects are printed in an implementation-dependent manner. It is not required that an implementation print those objects readably. For example, hash tables, readtables, packages, streams, and functions might not print readably. A common notation to use in this circumstance is `#<...>`. Since `#<` is not readable by the Lisp reader, the precise format of the text which follows is not important, but a common format to use is that provided by the print-unreadable-object macro. For information on how the Lisp reader treats this notation, see Section 2.4.8.20 Sharpsign Less-Than-Sign. For information on how to notate objects that cannot be printed readably, see Section 2.4.8.6 Sharpsign Dot.

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