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|
;;; 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" "task" "policy")
"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"
"task" "policy")))))
(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"
"task" "policy"))
"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
|
