find-symbol (Function)

Syntax:

Arguments and Values:

string—a string.

package—a package designator. The default is the current package.

symbol—a symbol accessible in the package, or nil.

status—one of :inherited, :external, :internal, or nil.

Description:

find-symbol locates a symbol whose name is string in a package. If a symbol named string is found in package, directly or by inheritance, the symbol found is returned as the first value; the second value is as follows:

:internal

If the symbol is present in package as an internal symbol.

:external

If the symbol is present in package as an external symbol.

:inherited

If the symbol is inherited by package through use-package, but is not present in package.

If no such symbol is accessible in package, both values are nil.

Examples:

 (find-symbol "NEVER-BEFORE-USED") → NIL, NIL
 (find-symbol "NEVER-BEFORE-USED") → NIL, NIL
 (intern "NEVER-BEFORE-USED") → NEVER-BEFORE-USED, NIL
 (intern "NEVER-BEFORE-USED") → NEVER-BEFORE-USED, :INTERNAL
 (find-symbol "NEVER-BEFORE-USED") → NEVER-BEFORE-USED, :INTERNAL
 (find-symbol "never-before-used") → NIL, NIL
 (find-symbol "CAR" 'common-lisp-user) → CAR, :INHERITED
 (find-symbol "CAR" 'common-lisp) → CAR, :EXTERNAL
 (find-symbol "NIL" 'common-lisp-user) → NIL, :INHERITED
 (find-symbol "NIL" 'common-lisp) → NIL, :EXTERNAL
 (find-symbol "NIL" (prog1 (make-package "JUST-TESTING" :use '())
                           (intern "NIL" "JUST-TESTING")))
→ JUST-TESTING::NIL, :INTERNAL
 (export 'just-testing::nil 'just-testing)
 (find-symbol "NIL" 'just-testing) → JUST-TESTING:NIL, :EXTERNAL
 (find-symbol "NIL" "KEYWORD")
→ NIL, NIL
or→ :NIL, :EXTERNAL
 (find-symbol (symbol-name :nil) "KEYWORD") → :NIL, :EXTERNAL

Affected By:

intern, import, export, use-package, unintern, unexport, unuse-package

See Also:

intern, find-all-symbols

Notes:

find-symbol is operationally equivalent to intern, except that it never creates a new symbol.