4 files changed, 101 insertions, 0 deletions
diff --git a/README.org b/README.org
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+* forget
+
+Forget things about symbols. Handy during interactive development.
+
+The `forget` function will forget function bindings, symbol bindings,
+and class bindings. It will also unintern a symbol from its home package.
+
+The `forget` function can forget packages too, but you must pass
+`:package? t` as an argument. 
+
+Any of the default options can be turned off by passing `nil` to the
+appropriate option. E.g. if you wanted to forget everything but not
+unintern the symbol, you'd pass `:intern? nil`. 
+
+Example:
+
+#+begin_src lisp
+CL-USER> (defvar unremarkable "hey")
+UNREMARKABLE
+
+CL-USER> (defun unremarkable () "hey")
+UNREMARKABLE
+
+CL-USER> (defclass unremarkable () ())
+#<STANDARD-CLASS COMMON-LISP-USER::UNREMARKABLE>
+
+CL-USER> (setf (get 'unremarkable :hey) "you")
+"you"
+
+CL-USER> (defpackage :unremarkable (:use #:cl))
+#<PACKAGE "UNREMARKABLE">
+
+CL-USER> (forget:forget 'unremarkable)
+WARNING: Unbinding function UNREMARKABLE
+WARNING: Unbinding value UNREMARKABLE
+WARNING: Unbinding class UNREMARKABLE
+WARNING: Dropping symbol-plist on UNREMARKABLE
+WARNING: Uninterning UNREMARKABLE from "COMMON-LISP-USER"
+NIL
+
+CL-USER> (forget:forget 'unremarkable :package? t)
+WARNING: Uninterning UNREMARKABLE from "COMMON-LISP-USER"
+WARNING: Deleting package "UNREMARKABLE"
+T
+CL-USER> 
+
+#+end_src
diff --git a/forget.asd b/forget.asd
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+++ b/forget.asd
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+;;;; forget.asd
+
+(asdf:defsystem #:forget
+  :description "Development utility to forget everything about a symbol"
+  :author "Colin <colin@cicadas.surf>"
+  :license  "Unlicense"
+  :version "0.0.1"
+  :serial t
+  :components ((:file "package")
+               (:file "forget")))
diff --git a/forget.lisp b/forget.lisp
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+++ b/forget.lisp
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+;;;; forget.lisp
+
+(in-package #:forget)
+
+(defun forget (symbol &key
+                        (function? t)
+                        (value? t)
+                        (class? t)
+                        (plist? t)
+                        (interns? t)
+                        (package? nil))
+  "Uninterns and forgets everything about a symbol"
+  (assert (symbolp symbol) (symbol) "~s is not a symbol." symbol)
+
+  (when (and function? (fboundp symbol))
+    (warn "Unbinding function ~s" symbol)
+    (fmakunbound symbol))
+
+  (when (and value? (boundp symbol))
+    (warn "Unbinding value ~s" symbol)
+    (makunbound symbol))
+
+  (when (and class? (find-class symbol nil))
+    (warn "Unbinding class ~s" symbol)
+    (setf (find-class symbol) nil))
+
+  (when (and plist? (symbol-plist symbol))
+    (warn "Dropping symbol-plist on ~s" symbol)
+    (setf (symbol-plist symbol) nil))
+
+  (when interns?
+    (warn "Uninterning ~s from ~s"
+          symbol
+          (package-name (symbol-package symbol)))
+    (unintern symbol (symbol-package symbol)))
+
+  (when (and package? (find-package symbol))
+    (warn "Deleting package ~s" (package-name (find-package symbol)))
+    (delete-package (find-package symbol))))
diff --git a/package.lisp b/package.lisp
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+;;;; package.lisp
+
+(defpackage #:forget
+  (:use #:cl)
+  (:export #:forget))