1 ;;; autodoc.rkt -- suport for autodoc echo
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 May 03, 2009 14:45
14 (provide autodoc module-exports update-signature-cache get-help)
23 (define (get-help symbol mod)
24 (with-handlers ([exn? (lambda (_)
25 (eval `(help ,symbol)))])
26 (eval `(help ,symbol #:from ,(ensure-module-spec mod)))))
31 (map (lambda (id) (or (autodoc* id) (list id))) ids)))
33 (define (autodoc* id (extra #t))
35 (with-handlers ([exn? (const "")])
36 (format "~.a" (namespace-variable-value id))))
39 (let* ([loc (symbol-location* id)]
42 [sgns (and path (find-signatures path name id))]
43 [value (if (and extra sgns (not (list? sgns)))
44 (list (cons 'value (val)))
46 [mod (if (and extra sgns path)
48 (module-path-name->name path)))
53 (args ,@(if (list? sgns) (map format-signature sgns) '()))
57 (define (format-signature sign)
59 `((required ,@(signature-required sign))
60 (optional ,@(signature-optional sign)
61 ,@(let ((rest (signature-rest sign)))
62 (if rest (list "...") '())))
63 (key ,@(signature-keys sign)))
66 (define signatures (make-hash))
68 (struct signature (required optional keys rest))
70 (define (find-signatures path name local-name)
71 (let ([path (if (path? path) (path->string path) path)])
72 (hash-ref! (hash-ref! signatures
74 (lambda () (parse-signatures path)))
76 (lambda () (infer-signatures local-name)))))
78 (define (parse-signatures path)
79 (let ([result (make-hasheq)])
80 (with-handlers ([exn? (lambda (e) result)])
81 (with-input-from-file path
83 (parameterize ([read-accept-reader #t])
84 (let loop ([stx (read-syntax path)])
85 (cond [(eof-object? stx) void]
86 [(syntax->datum stx) =>
88 (parse-datum! datum result)
89 (loop (read-syntax path)))]
93 (define (parse-datum! datum store)
94 (with-handlers ([exn? (lambda (_) void)])
96 [`(module ,name ,lang (#%module-begin . ,forms))
97 (for-each (lambda (f) (parse-datum! f store)) forms)]
98 [`(module ,name ,lang . ,forms)
99 (for-each (lambda (f) (parse-datum! f store)) forms)]
100 [`(define ((,name . ,formals) . ,_) . ,_)
101 (add-signature! name formals store)]
102 [`(define (,name . ,formals) . ,_)
103 (add-signature! name formals store)]
104 [`(define ,name (lambda ,formals . ,_))
105 (add-signature! name formals store)]
106 [`(define ,name (case-lambda ,clauses ...))
107 (for-each (lambda (c) (add-signature! name (car c) store))
109 [`(,(or 'struct 'define-struct) ,name ,(? symbol? _)
110 ,(list formals ...) . ,_)
111 (add-signature! name formals store)]
112 [`(,(or 'struct 'define-struct) ,name ,(list formals ...) . ,_)
113 (add-signature! name formals store)]
114 [`(define-for-syntax (,name . ,formals) . ,_)
115 (add-signature! name formals store)]
116 [`(define-for-syntax ,name (lambda ,formals . ,_))
117 (add-signature! name formals store)]
118 [`(define-syntax-rule (,name . ,formals) . ,_)
119 (add-signature! name formals store)]
120 [`(define-syntax ,name (syntax-rules ,specials . ,clauses))
121 (for-each (lambda (c) (add-syntax-signature! name (cdar c) store))
123 [`(define-syntax ,name (lambda ,_ (syntax-case ,_ . ,clauses)))
124 (for-each (lambda (c) (add-syntax-signature! name (cdar c) store))
128 (define (add-signature! name formals store)
132 (cons (parse-formals formals)
133 (hash-ref store name '())))))
135 (define (add-syntax-signature! name formals store)
139 (cons (signature formals '() '() #f)
140 (hash-ref store name '())))))
142 (define (parse-formals formals)
143 (let loop ([formals formals] [req '()] [opt '()] [keys '()])
144 (cond [(null? formals)
145 (signature (reverse req) (reverse opt) (reverse keys) #f)]
147 (signature (reverse req) (reverse opt) (reverse keys) formals)]
148 [(pair? (car formals)) (loop (cdr formals)
150 (cons (car formals) opt)
152 [(keyword? (car formals)) (let* ((kname (car formals))
153 (arg-id (cadr formals))
154 (name (if (pair? arg-id)
162 [else (loop (cdr formals) (cons (car formals) req) opt keys)])))
164 (define (infer-signatures name)
165 (with-handlers ([exn:fail:syntax? (const `(,(signature '(...) '() '() #f)))]
166 [exn:fail:contract:variable? (const #f)])
167 (let ([v (namespace-variable-value name)])
169 (arity->signatures (procedure-arity v))
172 (define (arity->signatures arity)
173 (define (args count) (build-list count (const '_)))
174 (define (arity->signature arity)
175 (cond [(number? arity)
176 (signature (args arity) '() '() #f)]
177 [(arity-at-least? arity)
178 (signature (args (arity-at-least-value arity)) '() '() 'rest)]))
179 (define (conseq? lst)
180 (cond [(< (length lst) 2) (number? (car lst))]
181 [(and (number? (car lst))
183 (eqv? (+ 1 (car lst)) (cadr lst)))
186 (cond [(and (list? arity) (conseq? arity))
187 (let ((mi (apply min arity))
188 (ma (apply max arity)))
189 (list (signature (args mi) (args (- ma mi)) '() #f)))]
190 [(list? arity) (map arity->signature arity)]
191 [else (list (arity->signature arity))]))
193 (define (update-signature-cache path (form #f))
194 (when (and (string? path)
199 '(define-syntax-rule struct
200 define-syntax define set! define-struct)))))
201 (hash-remove! signatures path)))
203 (define (module-exports mod)
205 (with-handlers ([exn? (const #f)])
206 (dynamic-require mod id (const #f))))
207 (define (contracted id)
208 (let ([v (value id)])
209 (if (has-contract? v)
210 (list id (cons 'info (contract-name (value-contract v))))
213 (let ((sign (eval `(,autodoc* ',id #f)
214 (module-spec->namespace mod #f #f))))
215 (if sign (list id (cons 'signature sign)) (list id))))
216 (define (extract-ids ls)
217 (append-map (lambda (idls)
218 (map car (cdr idls)))
220 (define (classify-ids ids)
221 (let loop ([ids ids] [procs '()] [vars '()])
223 `((procs ,@(map entry (reverse procs)))
224 (vars ,@(map list (reverse vars))))]
225 [(procedure? (value (car ids)))
226 (loop (cdr ids) (cons (car ids) procs) vars)]
227 [else (loop (cdr ids) procs (cons (car ids) vars))])))
228 (let-values ([(reg syn)
229 (module-compiled-exports
230 (get-module-code (resolve-module-path mod #f)))])
231 (let ([syn (map contracted (extract-ids syn))]
232 [reg (extract-ids reg)]
233 [subm (map list (or (submodules mod) '()))])
234 `((syntax ,@syn) ,@(classify-ids reg) (modules ,@subm)))))