Permalink
Cannot retrieve contributors at this time
Name already in use
A tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. Are you sure you want to create this branch?
alef/registry.lisp
Go to fileThis commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
60 lines (47 sloc)
1.72 KB
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
(defvar *constructors*) | |
(defvar *functions*) | |
(defvar *vars*) | |
(defmacro in-fresh-context (&body body) | |
`(let ((*constructors* (make-hash-table)) | |
(*functions* (make-hash-table)) | |
(*vars* (list))) | |
(register-builtin-types) | |
(register-prim-functions) | |
,@body)) | |
(defun add-constructors (constructors) | |
(loop for (cons-name . cons-type) in constructors | |
do (setf (gethash cons-name *constructors*) cons-type))) | |
(defun add-vars (vars) | |
(setf *vars* | |
(append | |
(loop for (var-name . var-expr) in vars | |
collect (list var-name var-expr nil)) | |
*vars*))) | |
(defun constructorp (x) | |
(typecase x | |
(integer t) | |
(string t) | |
(atom | |
(nth-value 1 (gethash x *constructors*))))) | |
(defclass function-info () | |
()) | |
(defclass proto-function-info (function-info) | |
((arity :initarg :arity :reader function-arity))) | |
(defclass prim-function-info (proto-function-info) | |
((fun :initarg :fun :reader prim-function))) | |
(defclass match-function-info (function-info) | |
((matches :initarg :matches :reader function-matches))) | |
(defmethod function-arity ((function-info match-function-info)) | |
(length (caar (function-matches function-info)))) | |
(defun register-proto-function (fun-name arity) | |
(setf (gethash fun-name *functions*) | |
(make-instance 'proto-function-info :arity arity))) | |
(defun register-match-function (fun-name matches) | |
(setf (gethash fun-name *functions*) | |
(make-instance 'match-function-info :matches matches))) | |
(defun register-prim-function (fun-name arity fun) | |
(setf (gethash fun-name *functions*) | |
(make-instance 'prim-function-info :arity arity :fun fun))) | |
(defun lookup-function (fun-name) | |
(format nil "~A" *functions*) | |
(gethash fun-name *functions*)) |