1 ;;; doc.scm -- procedures providing documentation on scheme objects
3 ;; Copyright (C) 2009, 2010 Jose Antonio Ortega Ruiz
5 ;; This program is free software; you can redistribute it and/or
6 ;; modify it under the terms of the Modified BSD License. You should
7 ;; have received a copy of the license along with this program. If
8 ;; not, see <http://www.xfree86.org/3.3.6/COPYRIGHT2.html#5>.
10 ;; Start date: Sun Feb 08, 2009 18:44
12 (define-module (geiser doc)
16 #:use-module (geiser utils)
17 #:use-module (geiser modules)
18 #:use-module (system vm program)
19 #:use-module (ice-9 session)
20 #:use-module (ice-9 documentation)
21 #:use-module (ice-9 regex)
22 #:use-module (ice-9 format)
23 #:use-module (oop goops)
24 #:use-module (srfi srfi-1))
29 (map (lambda (id) (or (autodoc* id) (list id))) ids)))
32 (let ((args (obj-args (symbol->object id))))
34 `(,@(signature id args)
35 (module . ,(symbol-module id))))))
37 (define (object-signature name obj)
38 (let ((args (obj-args obj)))
39 (and args (signature name args))))
41 (define (signature id args-list)
42 (define (arglst args kind)
43 (let ((args (assq-ref args kind)))
44 (cond ((or (not args) (null? args)) '())
48 `((required ,@(arglst as 'required))
49 (optional ,@(arglst as 'optional)
50 ,@(let ((rest (assq-ref as 'rest)))
51 (if rest (list "...") '())))
52 (key ,@(arglst as 'keyword))))
53 (let* ((args-list (map mkargs (if (list? args-list) args-list '())))
54 (value (if (null? args-list)
55 (format #f "~:@y" (symbol->object id))
57 (list id (cons 'args args-list) (cons 'value value))))
59 (define default-macro-args '(((required ...))))
61 (define (obj-args obj)
63 ((or (procedure? obj) (program? obj)) (arguments obj))
64 ((and (macro? obj) (macro-transformer obj)) => macro-args)
65 ((macro? obj) default-macro-args)
68 (define (arguments proc)
69 (define (p-arguments prog)
70 (map (lambda (a) ((@@ (system vm program) arity->arguments-alist) prog a))
71 (or (program-arities prog) '())))
72 (define (clist f) (lambda (x) (let ((y (f x))) (and y (list y)))))
73 (cond ((is-a? proc <generic>) (generic-args proc))
74 ((procedure-property proc 'arglist) => (clist arglist->args))
75 ((procedure-source proc) => (clist source->args))
76 ((doc->args proc) => list)
77 ((program? proc) (let ((a (p-arguments proc)))
78 (and (not (null? a)) a)))
79 ((procedure-property proc 'arity) => (clist arity->args))
82 (define (source->args src)
83 (let ((formals (cadr src)))
84 (cond ((list? formals) `((required . ,formals)))
86 `((required . ,(car formals)) (rest . ,(cdr formals))))
89 (define (macro-args tf)
90 (define* (collect args #:optional (req '()))
91 (cond ((null? args) (arglist->args `(,(reverse req) #f #f r #f)))
92 ((symbol? args) (arglist->args `(,(reverse req) #f #f r ,args)))
93 ((and (pair? args) (symbol? (car args)))
94 (collect (cdr args) (cons (car args) req)))
96 (let* ((pats (procedure-property tf 'patterns))
97 (args (and pats (filter-map collect pats))))
98 (or (and args (not (null? args)) args) default-macro-args)))
100 (define (arity->args art)
101 (define (gen-arg-names count)
102 (map (lambda (x) '_) (iota (max count 0))))
103 (let ((req (car art))
107 (list (cons 'required (gen-arg-names req)))
110 (list (cons 'optional (gen-arg-names opt)))
112 ,@(if rest (list (cons 'rest 'rest)) '()))))
114 (define (arglist->args arglist)
115 `((required . ,(car arglist))
116 (optional . ,(cadr arglist))
117 (keyword . ,(caddr arglist))
118 (rest . ,(car (cddddr arglist)))))
120 (define (doc->args proc)
121 (define proc-rx "-- Scheme Procedure: ([^[\n]+)\n")
122 (define proc-rx2 "-- Scheme Procedure: ([^[\n]+\\[[^\n]*(\n[^\n]+\\]+)?)")
123 (cond ((procedure-property proc 'geiser-document-args))
124 ((object-documentation proc)
126 (let* ((match (or (string-match proc-rx doc)
127 (string-match proc-rx2 doc)))
129 (parse-signature-string
130 (match:substring match 1)))))
131 (set-procedure-property! proc 'geiser-document-args args)
135 (define (parse-signature-string str)
136 (define opt-arg-rx "\\[([^] ]+)\\]?")
137 (define opt-arg-rx2 "([^ ])+\\]+")
138 (let ((tokens (string-tokenize str)))
139 (if (< (length tokens) 2)
141 (let loop ((tokens (cdr tokens)) (req '()) (opt '()) (rest #f))
142 (cond ((null? tokens)
143 `((required ,@(map string->symbol (reverse! req)))
144 (optional ,@(map string->symbol (reverse! opt)))
146 (list (cons 'rest (string->symbol rest)))
148 ((string=? "." (car tokens))
149 (if (not (null? (cdr tokens)))
150 (loop (cddr tokens) req opt (cadr tokens))
151 (loop '() req opt "rest")))
152 ((or (string-match opt-arg-rx (car tokens))
153 (string-match opt-arg-rx2 (car tokens)))
157 (cons (match:substring m 1) opt)
159 (else (loop (cdr tokens)
160 (cons (car tokens) req)
164 (define (generic-args gen)
165 (define (src> src1 src2)
166 (> (length (cadr src1)) (length (cadr src2))))
169 (lambda () (method-source m))
170 (lambda (k . a) #f)))
171 (let* ((methods (generic-function-methods gen))
172 (srcs (filter identity (map src methods))))
173 (cond ((and (null? srcs)
174 (not (null? methods))
175 (method-procedure (car methods))) => arguments)
176 ((not (null? srcs)) (list (source->args (car (sort! srcs src>)))))
177 (else '(((rest . rest)))))))
179 (define (symbol-documentation sym)
180 (let ((obj (symbol->object sym)))
182 `((signature . ,(or (obj-signature sym obj) sym))
183 (docstring . ,(docstring sym obj))))))
185 (define (docstring sym obj)
186 (with-output-to-string
188 (let* ((type (cond ((macro? obj) "A macro")
189 ((procedure? obj) "A procedure")
190 ((program? obj) "A compiled program")
192 (modname (symbol-module sym))
193 (doc (object-documentation obj)))
197 (display " in module ")
200 (if doc (begin (newline) (display doc)))))))
202 (define (obj-signature sym obj)
203 (let ((args (obj-args obj)))
204 (and args (signature sym args))))
206 ;;; doc.scm ends here