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;; autodoc.ss -- support for autodoc
;; Copyright (C) 2009 Jose Antonio Ortega Ruiz
;; Author: Jose Antonio Ortega Ruiz <jao@gnu.org>
;; Start date: Sun May 03, 2009 14:45
;; This file is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3 of the License, or
;; (at your option) any later version.
;; This file is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;;; Code:
#lang scheme
(provide autodoc update-module-cache)
(require geiser/utils geiser/locations)
(define (autodoc form)
(cond ((null? form) #f)
((symbol? form) (describe-application (list form)))
((not (pair? form)) #f)
((not (list? form)) (autodoc (pair->list form)))
((define-head? form) => autodoc)
(else (autodoc/list form))))
(define (autodoc/list form)
(let ((lst (last form)))
(cond ((and (symbol? lst) (describe-application (list lst))))
((and (pair? lst) (not (memq (car lst) '(quote))) (autodoc lst)))
(else (describe-application form)))))
(define (define-head? form)
(define defforms '(-define
define define-values
define-method define-class define-generic define-struct
define-syntax define-syntaxes -define-syntax))
(and (= 2 (length form))
(memq (car form) defforms)
(car form)))
(define (describe-application form)
(let* ((fun (car form))
(loc (symbol-location* fun))
(name (car loc))
(path (cdr loc))
(sgn (and path (signature path name fun))))
(and sgn
(list (cons 'signature (cons fun sgn))
(cons 'position 0)
(cons 'module (module-path-name->name path))))))
(define signatures (make-hash))
(define (signature path name local-name)
(let ((path (if (path? path) (path->string path) path)))
(hash-ref! (hash-ref! signatures
path
(lambda () (parse-signatures path)))
name
(lambda () (infer-signature local-name)))))
(define (parse-signatures path)
(let ((result (make-hasheq)))
(with-handlers ((exn? (lambda (e) result)))
(with-input-from-file path
(lambda ()
(parameterize ((read-accept-reader #t))
(let loop ((stx (read-syntax path)))
(cond ((eof-object? stx) void)
((syntax->datum stx) =>
(lambda (datum)
(parse-datum! datum result)
(loop (read-syntax path))))
(else void)))))))
result))
(define (parse-datum! datum store)
(match datum
((list 'module name lang forms ...)
(for-each (lambda (f) (parse-datum! f store)) forms))
((list 'define (list name formals ...) body ...)
(add-signature! name formals store))
((list 'define name (list 'lambda formals body ...))
(add-signature! name formals store))
(_ void)))
(define (add-signature! name formals store)
(hash-set! store name (parse-formals formals)))
(define (parse-formals formals)
(let loop ((formals formals) (req '()) (opt '()) (keys '()))
(cond ((null? formals) (make-signature req opt keys #f))
((symbol? formals) (make-signature req opt keys formals))
((pair? (car formals)) (loop (cdr formals)
req
(cons (car formals) opt)
keys))
((keyword? (car formals)) (let* ((kname (keyword->symbol (car formals)))
(arg-id (cadr formals))
(name (if (pair? arg-id)
(list kname (cadr arg-id))
kname)))
(loop (cddr formals)
req
opt
(cons name keys))))
(else (loop (cdr formals) (cons (car formals) req) opt keys)))))
(define (make-signature req opt keys rest)
`(,@(reverse req)
,@(if (null? opt) opt
(cons '#:opt (reverse opt)))
,@(if (null? keys) keys
(cons '#:key (reverse keys)))
,@(if rest (list '#:rest rest) '())))
(define (update-module-cache path . form)
(when (and (string? path)
(or (null? form)
(and (list? (car form))
(not (null? (car form)))
(memq (caar form) '(define)))))
(hash-remove! signatures path)))
(define (infer-signature name)
(let ((value (namespace-variable-value name (lambda () #f))))
(and (procedure? value)
(arity->signature (procedure-arity value)))))
(define (arity->signature arity)
(cond ((number? arity)
(make-signature (gen-arg-names 1 arity) '() '() #f))
((arity-at-least? arity)
(make-signature (gen-arg-names 1 (arity-at-least-value arity))
'() '() 'rest))
(else
(let ((arg (map (lambda (a)
(if (number? a) a (list (arity-at-least-value a) '...)))
arity)))
(make-signature (list arg) '() '() #f)))))
(define (gen-arg-names fst count)
(let* ((letts (list->vector '(#\x #\y #\z #\u #\v #\w #\t)))
(len (vector-length letts))
(lett (lambda (n) (vector-ref letts (modulo n len)))))
(reverse (map (lambda (n) (string->symbol (format "~a" (lett (- n 1)))))
(build-list (max count 1) (lambda (n) (+ n fst)))))))
;;; autodoc.ss ends here
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