Documentation
Creates a hash table and the associated accessors.
Source
(defmacro deflookup-table
(name &key (var (make-lookup-name name "*" name "*"))
(reader (make-lookup-name name "GET-" name))
(writer (make-lookup-name name "GET-" name))
(rem-er (make-lookup-name name "REM-" name))
(documentation
(format nil "Global var for the ~S lookup table" name))
(test 'eql)
(initial-contents nil))
"Creates a hash table and the associated accessors."
;; if they explicitly pass in NIL we make the name a gensym
(unless var
(setf var (gensym (strcat "var for " name " lookup table "))))
(unless reader
(setf reader (gensym (strcat "reader for " name " lookup table "))))
(unless writer
(setf writer (gensym (strcat "writer for " name " lookup table "))))
(assert (symbolp name) (name)
"The name of the lookup table must be a symbol.")
(assert (symbolp var) (var)
"The name of the underlying var must be a symbol.")
(assert (symbolp reader) (reader)
"The name of the reader for a lookup table must be a symbol.")
(assert (symbolp writer) (writer)
"The name of the writer for a lookup table must be a symbol.")
`(progn
(defvar ,var
(build-hash-table '(:test ,test) ,initial-contents)
,documentation)
(defun ,reader (key &optional default)
(gethash key ,var default))
(defun (setf ,writer) (value key)
(setf (gethash key ,var) value))
(defun ,rem-er (key)
(remhash key ,var))
(list ',name ',var ',reader '(setf ,writer) ',rem-er)))Source Context