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• Std/basic

Symbol-package-name-non-cl

The symbol-package-name of a symbol, but not "COMMON-LISP".

Signature

(symbol-package-name-non-cl sym) → pkg

Arguments

sym — Guard (symbolp sym).

Returns

pkg — Type (stringp pkg).

This function is just symbol-package-name, except that it never returns "COMMON-LISP": if the symbol-package-name is "COMMON-LISP", we return "ACL2" instead.

Example:

ACL2 !>(symbol-package-name-non-cl 'car)
"ACL2"
ACL2 !>(symbol-package-name 'car)
"COMMON-LISP"
ACL2 !>

This utility may be useful to obtain, from an existing symbol, a package name into whose package we want to intern a symbol for a new function name, which cannot be interned into the "COMMON-LISP" package.

Definitions and Theorems

Function: symbol-package-name-non-cl

(defun symbol-package-name-non-cl (sym)
  (declare (xargs :guard (symbolp sym)))
  (let ((__function__ 'symbol-package-name-non-cl))
    (declare (ignorable __function__))
    (fix-pkg (symbol-package-name sym))))

Theorem: stringp-of-symbol-package-name-non-cl

(defthm stringp-of-symbol-package-name-non-cl
  (b* ((pkg (symbol-package-name-non-cl sym)))
    (stringp pkg))
  :rule-classes :rewrite)