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| ANSI Common Lisp 10 Symbols 10.2 Dictionary of Symbols
10.2.12 symbol-package | Function
  Syntax: symbol-package symbol contents Arguments and Values: symbol - a symbol. contents - a package object or nil. Description: Returns the home package of symbol. Examples:
       (in-package "CL-USER")  #<PACKAGE "COMMON-LISP-USER">
       (symbol-package 'car)  #<PACKAGE "COMMON-LISP">
       (symbol-package 'bus)  #<PACKAGE "COMMON-LISP-USER">
       (symbol-package :optional)  #<PACKAGE "KEYWORD">
       ;; Gensyms are uninterned, so have no home package.
       (symbol-package (gensym))   NIL
       (make-package 'pk1)  #<PACKAGE "PK1">
       (intern "SAMPLE1" "PK1")   PK1::SAMPLE1, NIL
       (export (find-symbol "SAMPLE1" "PK1") "PK1")   T
       (make-package 'pk2 :use '(pk1))  #<PACKAGE "PK2">
       (find-symbol "SAMPLE1" "PK2")   PK1:SAMPLE1, :INHERITED
       (symbol-package 'pk1::sample1)  #<PACKAGE "PK1">
       (symbol-package 'pk2::sample1)  #<PACKAGE "PK1">
       (symbol-package 'pk1::sample2)  #<PACKAGE "PK1">
       (symbol-package 'pk2::sample2)  #<PACKAGE "PK2">
       ;; The next several forms create a scenario in which a symbol
       ;; is not really uninterned, but is "apparently uninterned",
       ;; and so SYMBOL-PACKAGE still returns NIL.
       (setq s3 'pk1::sample3)   PK1::SAMPLE3
       (import s3 'pk2)   T
       (unintern s3 'pk1)   T
       (symbol-package s3)   NIL
       (eq s3 'pk2::sample3)   T
Affected By: import, intern, unintern Exceptional Situations: Should signal an error of type type-error if symbol is not a symbol. See Also: intern Allegro CL Implementation Details: None.

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