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Allegro CL |
ANSI Common Lisp  22 Printer 22.1 The Lisp Printer 22.1.3 Default Print-Object Methods
22.1.3.12 Printing StructuresBy default, a structure of type S is printed using #S syntax. This behavior can be customized by specifying a :print-function or :print-object option to the defstruct form that defines S, or by writing a print-object method that is specialized for objects of type S.Different structures might print out in different ways; the default notation for structures is:
#S(structure-name {slot-key slot-value}*)
where #S indicates structure syntax,
structure-name is a structure name,
each slot-key is an initialization argument name
for a slot in the structure,
and each corresponding slot-value is a representation
of the object in that slot.
For information on how the Lisp reader parses structures, see Section 2.4.8.13 Sharpsign S. |