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0e81dabd MD |
1 | ;;;; Copyright (C) 1997 Free Software Foundation, Inc. |
2 | ;;;; | |
3 | ;;;; This program is free software; you can redistribute it and/or modify | |
4 | ;;;; it under the terms of the GNU General Public License as published by | |
5 | ;;;; the Free Software Foundation; either version 2, or (at your option) | |
6 | ;;;; any later version. | |
7 | ;;;; | |
8 | ;;;; This program is distributed in the hope that it will be useful, | |
9 | ;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | ;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | ;;;; GNU General Public License for more details. | |
12 | ;;;; | |
13 | ;;;; You should have received a copy of the GNU General Public License | |
14 | ;;;; along with this software; see the file COPYING. If not, write to | |
c6e23ea2 JB |
15 | ;;;; the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | ;;;; Boston, MA 02111-1307 USA | |
0e81dabd MD |
17 | ;;;; |
18 | \f | |
19 | ||
bbefd480 MD |
20 | (define-module (ice-9 session) |
21 | :no-backtrace) | |
0e81dabd MD |
22 | |
23 | \f | |
24 | ||
25 | ;;; {Apropos} | |
26 | ;;; | |
27 | ;;; Author: Roland Orre <orre@nada.kth.se> | |
28 | ;;; | |
29 | ||
30 | (define (id x) x) | |
31 | ||
0e81dabd MD |
32 | (define-public (apropos rgx . options) |
33 | "Search for bindings: apropos regexp {options= 'full 'shadow 'value}" | |
34 | (if (zero? (string-length rgx)) | |
35 | "Empty string not allowed" | |
4f161c5c | 36 | (let* ((match (make-regexp rgx)) |
0e81dabd MD |
37 | (modules (cons (current-module) |
38 | (module-uses (current-module)))) | |
39 | (separator #\tab) | |
40 | (shadow (member 'shadow options)) | |
41 | (value (member 'value options))) | |
42 | (cond ((member 'full options) | |
43 | (set! shadow #t) | |
44 | (set! value #t))) | |
45 | (for-each | |
46 | (lambda (module) | |
47 | (let* ((builtin (or (eq? module the-scm-module) | |
48 | (eq? module the-root-module))) | |
49 | (name (module-name module)) | |
50 | (obarrays (if builtin | |
51 | (list (builtin-weak-bindings) | |
52 | (builtin-bindings)) | |
53 | (list (module-obarray module)))) | |
54 | (get-refs (if builtin | |
55 | (list id id) | |
56 | (list variable-ref))) | |
57 | ) | |
58 | (for-each | |
59 | (lambda (obarray get-ref) | |
68aed3ea | 60 | (array-for-each |
0e81dabd MD |
61 | (lambda (oblist) |
62 | (for-each | |
63 | (lambda (x) | |
4f161c5c | 64 | (cond ((regexp-exec match (car x)) |
0e81dabd MD |
65 | (display name) |
66 | (display ": ") | |
67 | (display (car x)) | |
68 | (cond ((procedure? (get-ref (cdr x))) | |
69 | (display separator) | |
70 | (display (get-ref (cdr x)))) | |
71 | (value | |
72 | (display separator) | |
73 | (display (get-ref (cdr x))))) | |
74 | (if (and shadow | |
75 | (not (eq? (module-ref module | |
76 | (car x)) | |
77 | (module-ref (current-module) | |
78 | (car x))))) | |
79 | (display " shadowed")) | |
80 | (newline) | |
81 | ))) | |
82 | oblist)) | |
83 | obarray)) | |
84 | obarrays get-refs))) | |
85 | modules)))) | |
68aed3ea MD |
86 | |
87 | (define-public (apropos-internal rgx) | |
88 | "Return a list of accessible variable names." | |
bbefd480 MD |
89 | (letrec ((match (make-regexp rgx)) |
90 | (recorded (make-vector 61 '())) | |
91 | (obarray-names | |
92 | (lambda (obarray names) | |
70558403 | 93 | (hash-fold (lambda (name var vars) |
bbefd480 MD |
94 | (if (and (regexp-exec match name) |
95 | (not (hashq-get-handle recorded name))) | |
96 | (begin | |
97 | (hashq-set! recorded name #t) | |
98 | (cons name vars)) | |
99 | vars)) | |
70558403 MD |
100 | names |
101 | obarray)))) | |
bbefd480 MD |
102 | (do ((modules (cons (current-module) (module-uses (current-module))) |
103 | (cdr modules)) | |
104 | (names '() | |
105 | (if (or (eq? (car modules) the-scm-module) | |
106 | (eq? (car modules) the-root-module)) | |
107 | (obarray-names (builtin-weak-bindings) | |
108 | (obarray-names (builtin-bindings) | |
109 | names)) | |
110 | (obarray-names (module-obarray (car modules)) | |
111 | names)))) | |
112 | ((null? modules) names)))) | |
7cfae7e6 MD |
113 | |
114 | (define-public (name obj) | |
115 | (cond ((procedure? obj) (procedure-name obj)) | |
116 | ((macro? obj) (macro-name obj)) | |
117 | (else #f))) | |
118 | ||
119 | (define-public (source obj) | |
120 | (cond ((procedure? obj) (procedure-source obj)) | |
121 | ((macro? obj) (procedure-source (macro-transformer obj))) | |
122 | (else #f))) | |
4a9f464e MD |
123 | |
124 | (define-public (arity obj) | |
125 | (let ((arity (procedure-property obj 'arity))) | |
126 | (display (car arity)) | |
127 | (cond ((caddr arity) | |
128 | (display " or more")) | |
129 | ((not (zero? (cadr arity))) | |
130 | (display " required and ") | |
131 | (display (cadr arity)) | |
132 | (display " optional"))) | |
133 | (if (and (not (caddr arity)) | |
134 | (= (car arity) 1) | |
135 | (<= (cadr arity) 1)) | |
136 | (display " argument") | |
137 | (display " arguments")) | |
138 | (if (closure? obj) | |
139 | (let ((formals (cadr (procedure-source obj)))) | |
140 | (if (pair? formals) | |
141 | (begin | |
142 | (display ": `") | |
143 | (display (car formals)) | |
144 | (let loop ((ls (cdr formals))) | |
145 | (cond ((null? ls) | |
146 | (display #\')) | |
147 | ((not (pair? ls)) | |
148 | (display "', the rest in `") | |
149 | (display ls) | |
150 | (display #\')) | |
151 | (else | |
152 | (if (pair? (cdr ls)) | |
153 | (display "', `") | |
154 | (display "' and `")) | |
155 | (display (car ls)) | |
156 | (loop (cdr ls)))))) | |
157 | (begin | |
158 | (display " in `") | |
159 | (display formals) | |
160 | (display #\'))))) | |
161 | (display ".\n"))) | |
6ae34994 MD |
162 | |
163 | (define-public system-module | |
164 | (procedure->syntax | |
165 | (lambda (exp env) | |
166 | (let* ((m (nested-ref the-root-module | |
167 | (append '(app modules) (cadr exp))))) | |
168 | (if (not m) | |
169 | (error "Couldn't find any module named" (cadr exp))) | |
170 | (let ((s (not (procedure-property (module-eval-closure m) | |
171 | 'system-module)))) | |
172 | (set-system-module! m s) | |
173 | (string-append "Module " (symbol->string (module-name m)) | |
174 | " is now a " (if s "system" "user") " module.")))))) |