11.1. Introduction to Packages sec

11.1. Introduction to Packages sec_11-1-1
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11.1. Introduction to Packages [sec_11-1-1]

11.1.1. Function MAKE-PACKAGE
11.1.2. Macro DEFPACKAGE
11.1.3. Function EXT:RE-EXPORT
11.1.4. Function EXT:PACKAGE-CASE-INVERTED-P
11.1.5. Function EXT:PACKAGE-CASE-SENSITIVE-P

11.1.1. Function `MAKE-PACKAGE`

The default value of the :USE argument is (“COMMON-LISP”).

MAKE-PACKAGE accepts additional keyword arguments :CASE-SENSITIVE and :CASE-INVERTED (but not :MODERN!)

11.1.2. Macro `DEFPACKAGE`

DEFPACKAGE accepts additional options :CASE-SENSITIVE, :CASE-INVERTED, and :MODERN.

When the package being defined already exists, it is modified as follows (and in this order):

:CASE-SENSITIVE

adjusted with (SETF EXT:PACKAGE-CASE-SENSITIVE-P) (with a warning)

:CASE-INVERTED

adjusted with (SETF EXT:PACKAGE-CASE-INVERTED-P) (with a warning)

:MODERN

if “COMMON-LISP” is being used, it is un-used and “CS-COMMON-LISP” is used instead; also, “CS-COMMON-LISP” is used instead of “COMMON-LISP” throughout the DEFPACKAGE form, e.g.,

(DEFPACKAGE "FOO"
  (:MODERN T)
  (:USE "COMMON-LISP" "EXT"))

is equivalent to

(DEFPACKAGE "FOO"
  (:CASE-SENSITIVE T)
  (:CASE-INVERTED T)
  (:USE "CS-COMMON-LISP" "EXT"))

(:MODERN NIL) reverts the effects of (:MODERN T).

:NICKNAMES

adjusted with RENAME-PACKAGE

:DOCUMENTATION

reset to the new value with

(SETF
      DOCUMENTATION)

:SHADOW

adjusted with SHADOW

:SHADOWING-IMPORT-FROM

adjusted with SHADOWING-IMPORT

:USE

adjusted with USE-PACKAGE and UNUSE-PACKAGE

:IMPORT-FROM

adjusted with IMPORT

:INTERN

adjusted with INTERN (but not UNINTERN)

:EXPORT

adjusted with INTERN and EXPORT (but not UNEXPORT)

:SIZE

ignored

11.1.3. Function `EXT:RE-EXPORT`

The function (EXT:RE-EXPORT FROM-PACK TO-PACK) re-EXPORTs all external SYMBOLs from FROM-PACK also from TO-PACK, provided it already uses FROM-PACK; and SIGNALs an ERROR otherwise.

11.1.4. Function `EXT:PACKAGE-CASE-INVERTED-P`

Returns T if the argument is a case-inverted package. This function is SETFable, although it is probably not a good idea to change the case-inverted status of an existing package.

11.1.5. Function `EXT:PACKAGE-CASE-SENSITIVE-P`

Returns T if the argument is a :CASE-SENSITIVE PACKAGE. This function is SETFable, although it is probably not a good idea to change the case-sensitive status of an existing package.

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Chapter 11. Packages chap-11	Home	11.2. Constraints on the “COMMON-LISP” Package for Conforming Programs - package locking sec_11-1-2-1-2