1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
;;; urweb-defs.el --- Various definitions for urweb-mode
;; Based on sml-mode:
;; Copyright (C) 1999,2000,2003 Stefan Monnier <monnier@cs.yale.edu>
;;
;; Modified for urweb-mode:
;; Copyright (C) 2008 Adam Chlipala <adamc@hcoop.net>
;;
;; This program 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 2 of the License, or
;; (at your option) any later version.
;;
;; This program 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, write to the Free Software
;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
;;; Commentary:
;;; Code:
(eval-when-compile (require 'cl))
(require 'urweb-util)
(defgroup urweb ()
"Editing Ur/Web code."
:group 'languages)
(defvar urweb-outline-regexp
;; `st' and `si' are to match structure and signature.
" \\|s[ti]\\|[ \t]*\\(let[ \t]+\\)?\\(fun\\|and\\)\\>"
"Regexp matching a major heading.
This actually can't work without extending `outline-minor-mode' with the
notion of \"the end of an outline\".")
;;;
;;; Internal defines
;;;
(defmap urweb-mode-map
;; smarter cursor movement
'(("\C-c\C-i" . urweb-mode-info))
"The keymap used in `urweb-mode'."
;; :inherit urweb-bindings
:group 'urweb)
(defsyntax urweb-mode-syntax-table
`((?\* . ,(if urweb-builtin-nested-comments-flag ". 23n" ". 23"))
(?\( . "()1")
(?\) . ")(4")
("._'" . "_")
(",;" . ".")
;; `!' is not really a prefix-char, oh well!
("~#!" . "'")
("%&$+-/:<=>?@`^|" . "."))
"The syntax table used in `urweb-mode'.")
(easy-menu-define urweb-mode-menu urweb-mode-map "Menu used in `urweb-mode'."
'("Ur/Web"
["Ur/Web mode help (brief)" describe-mode t]
["Ur/Web mode *info*" urweb-mode-info t]
))
;; Make's sure they appear in the menu bar when urweb-mode-map is active.
;; On the hook for XEmacs only -- see easy-menu-add in auc-menu.el.
;; (defun urweb-mode-menu-bar ()
;; "Make sure menus appear in the menu bar as well as under mouse 3."
;; (and (eq major-mode 'urweb-mode)
;; (easy-menu-add urweb-mode-menu urweb-mode-map)))
;; (add-hook 'urweb-mode-hook 'urweb-mode-menu-bar)
;;
;; regexps
;;
(defun urweb-syms-re (&rest syms)
(concat "\\<" (regexp-opt (flatten syms) t) "\\>"))
;;
(defconst urweb-module-head-syms
'("signature" "structure" "functor"))
(defconst urweb-begin-syms
'("let" "struct" "sig")
"Symbols matching the `end' symbol.")
(defconst urweb-begin-syms-re
(urweb-syms-re urweb-begin-syms)
"Symbols matching the `end' symbol.")
;; (defconst urweb-user-begin-symbols-re
;; (urweb-syms-re "let" "abstype" "local" "struct" "sig" "in" "with")
;; "Symbols matching (loosely) the `end' symbol.")
(defconst urweb-sexp-head-symbols-re
(urweb-syms-re "let" "struct" "sig" "in" "with"
"if" "then" "else" "case" "of" "fn" "fun" "val" "and"
"datatype" "type" "open" "include"
urweb-module-head-syms
"con" "map" "where" "extern" "constraint" "constraints"
"table" "sequence" "class" "cookie")
"Symbols starting an sexp.")
;; (defconst urweb-not-arg-start-re
;; (urweb-syms-re "in" "of" "end" "andalso")
;; "Symbols that can't be found at the head of an arg.")
;; (defconst urweb-not-arg-re
;; (urweb-syms-re "in" "of" "end" "andalso")
;; "Symbols that should not be confused with an arg.")
(defconst urweb-=-starter-syms
(list* "|" "val" "fun" "and" "datatype" "con" "type" "class"
urweb-module-head-syms)
"Symbols that can be followed by a `='.")
(defconst urweb-=-starter-re
(concat "\\S.|\\S.\\|" (urweb-syms-re (cdr urweb-=-starter-syms)))
"Symbols that can be followed by a `='.")
(defconst urweb-indent-rule
(urweb-preproc-alist
`((,urweb-module-head-syms "d=" 0)
("if" "else" 0)
(,urweb-=-starter-syms nil)
(("case" "datatype" "if" "then" "else"
"let" "open" "sig" "struct" "type" "val"
"con" "constraint" "table" "sequence" "class" "cookie")))))
(defconst urweb-starters-indent-after
(urweb-syms-re "let" "in" "struct" "sig")
"Indent after these.")
(defconst urweb-delegate
(urweb-preproc-alist
`((("of" "else" "then" "with" "d=") . (not (urweb-bolp)))
("in" . t)))
"Words which might delegate indentation to their parent.")
(defcustom urweb-symbol-indent
'(("fn" . -3)
("of" . 1)
("|" . -2)
("," . -2)
(";" . -2)
;;("in" . 1)
("d=" . 2))
"Special indentation alist for some symbols.
An entry like (\"in\" . 1) indicates that a line starting with the
symbol `in' should be indented one char further to the right.
This is only used in a few specific cases, so it does not work
for all symbols and in all lines starting with the given symbol."
:group 'urweb
:type '(repeat (cons string integer)))
(defconst urweb-open-paren
(urweb-preproc-alist
`((,(list* "in" urweb-begin-syms) ,urweb-begin-syms-re "\\<end\\>")))
"Symbols that should behave somewhat like opening parens.")
(defconst urweb-close-paren
`(("in" "\\<let\\>")
("end" ,urweb-begin-syms-re)
("then" "\\<if\\>")
("else" "\\<if\\>" (urweb-bolp))
("of" "\\<case\\>")
("</xml>" "<xml>")
("d=" nil))
"Symbols that should behave somewhat like close parens.")
(defconst urweb-agglomerate-re "\\<else[ \t]+if\\>"
"Regexp of compound symbols (pairs of symbols to be considered as one).")
(defconst urweb-non-nested-of-starter-re
(urweb-syms-re "datatype")
"Symbols that can introduce an `of' that shouldn't behave like a paren.")
(defconst urweb-starters-syms
(append urweb-module-head-syms
'("datatype" "fun"
"open" "type" "val" "and"
"con" "constraint" "table" "sequence" "class" "cookie"))
"The starters of new expressions.")
(defconst urweb-exptrail-syms
'("if" "then" "else" "case" "of" "fn" "with" "map"))
(defconst urweb-pipeheads
'("|" "of" "fun" "fn" "and" "datatype")
"A `|' corresponds to one of these.")
(provide 'urweb-defs)
;;; urweb-defs.el ends here
|
