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monnier |
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;;; sml-mosml.el: Modifies inferior-sml-mode defaults for Moscow ML.
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;; Copyright (C) 1997, Matthew J. Morley
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;; $Revision: 1.5 $
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;; $Date: 1997/06/23 09:19:56 $
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;; This file is not part of GNU Emacs, but it is distributed under the
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;; same conditions.
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;; ====================================================================
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;; This program is free software; you can redistribute it and/or
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;; modify it under the terms of the GNU General Public License as
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;; published by the Free Software Foundation; either version 2, or (at
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;; your option) any later version.
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;; This program is distributed in the hope that it will be useful, but
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;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;; General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs; see the file COPYING. If not, write to the
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;; Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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;; ====================================================================
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;;; DESCRIPTION
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;; To use this library just put
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;;(autoload 'sml-mosml "sml-mosml" "Set up and run Moscow ML." t)
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;; in your .emacs file. If you only ever use Moscow ML then you might
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;; as well put something like
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;;(setq sml-mode-hook
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;; '(lambda() "SML mode defaults to Moscow ML"
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;; (define-key sml-mode-map "\C-cp" 'sml-mosml)))
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;; for your sml-mode-hook. The command prompts for the program name
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;; and any command line options.
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;; If you need to reset the default value of sml-program-name, or any
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;; of the other compiler variables, put something like
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;;(eval-after-load "sml-mosml" '(setq sml-program-name "whatever"))
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;; in your .emacs -- or you can use the inferior-sml-{load,mode}-hooks
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;; to achieve the same ends.
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;;; CODE
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(require 'sml-proc)
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;; The regular expression used when looking for errors. Moscow ML errors:
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(defconst sml-mosml-error-regexp
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(concat "^File \"\\([^\"]+\\)\"," ;1
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" line \\([0-9]+\\)-?\\([0-9]+\\)?," ;2-3?
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" characters \\([0-9]+\\)-\\([0-9]+\\):") ;4-5
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"Default regexp matching Moscow ML error messages.
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If you change this significantly you may also need to redefine
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`sml-mosml-error-parser' (qv).")
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;; File "puzz.ml", line 30-31, characters 10-70:
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;; ! ..........first 0 l = []
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;; ! | first n (h::t) = h::(first (n-1) t)
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;; ! Warning: pattern matching is not exhaustive
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;; ! Toplevel input:
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;; ditto
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(defconst sml-mosml-error-messages
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(concat "^! \\("
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(mapconcat 'identity
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(list "\\(Warning: .*\\)"
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"\\(Type clash\\):"
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"\\(Ill-formed infix expression\\)"
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"\\(Syntax error.*\\)")
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"\\|")
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"\\).*$")
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"RE to match Moscow ML type-of-error reports. This regular expression
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must follow the whole line pattern \"^! \\\\(%s\\\\).*$\", and the %s
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stands for a \"\\\\|\" separated list of regular expressions each of
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which must, I repeat *must*, contain at least one \"\\\\(%s\\\\)\" group.
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The %s regexp in the first such group will be the actual error report
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echoed to the user.")
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(defun sml-mosml-error-parser (pt)
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"This function looks for the next Moscow ML error message following PT
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and parses an error message into a list
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\(file start-line start-col end-of-err msg\)
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where
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FILE is the file in which the error occurs
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START-LINE is the line number in the file where the error occurs
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START-COL is the character position on START-LINE where the error occurs
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END-OF-ERR is an Emacs Lisp expression that when evaluated at
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\(start-line,start-col\) moves point to the end of the errorful text
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MSG is the text of the error message given by the compiler, if such text
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can be found.
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The first three are mandatory return values for `sml-next-error'.
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See also `sml-error-parser'."
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(save-excursion
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(goto-char pt)
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(if (not (looking-at sml-mosml-error-regexp))
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;; the user loses big time.
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(list nil nil nil)
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(let* ((file (match-string 1)) ; the file
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(slin (string-to-int (match-string 2))) ; the start line
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;; char range is (n,m], 0 is column 1 of slin
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(scol (string-to-int (match-string 4))) ; the start col
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;; get to the end by doing "forward-char m - n"
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(eoe `(forward-char ,(- (string-to-int (match-string 5)) scol)))
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(msg))
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;; look for the error message at end of the chunk of "! " lines
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(forward-line 1)
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(while (and (looking-at "^! ")
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(not (looking-at sml-mosml-error-messages)))
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(forward-line 1))
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;; found one if match-beginning 1 is non-nil.
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(if (match-beginning 1)
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(progn
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(setq msg (match-string 1))
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;; refine since m-begin 1 implies m-begin N for some N>1 as
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;; long as sml-mosml-error-messages is sane as advertised.
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;; match-data is a list N+1 of pairs, consecutive elts being
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;; beg and end markers for the \( \) in the match. 0 is the
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;; whole match.
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(let ((matches (1- (/ (length (match-data)) 2))) ; ignore 0th
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(group 2)) ; & ignore 1st
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(while (and (not (match-beginning group))
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(<= group matches))
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(setq group (1+ group)))
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(if (<= group matches)
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(setq msg (match-string group))))))
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;; 1+ scol because char 0 means column 1 of slin.
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(nconc (list file slin (1+ scol)) (list eoe) (list msg))))))
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;;;###autoload
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(defun sml-mosml (pfx)
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"Set up and run Moscow ML.
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Prefix argument means accept the defaults below.
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Note: defaults set here will be clobbered if you setq them in the
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inferior-sml-mode-hook.
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sml-program-name <option> \(default \"mosml\"\)
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sml-default-arg <option> \(default \"\"\)
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sml-use-command \"use \\\"%s\\\"\"
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sml-cd-command \"load \"FileSys\"; FileSys.chDir \\\"%s\\\"\"
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sml-prompt-regexp \"^- *\"
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sml-error-regexp sml-mosml-error-regexp
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sml-error-parser 'sml-mosml-error-parser"
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(interactive "P")
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(let ((cmd (if pfx "mosml"
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(read-string "Command name: " sml-program-name)))
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(arg (if pfx ""
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(read-string "Any arguments or options (default none): " ""))))
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;; sml-mode global variables
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(setq sml-program-name cmd)
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(setq sml-default-arg arg)
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;; buffer-local (compiler-local) variables
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(setq-default sml-use-command "use \"%s\""
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sml-cd-command "load \"FileSys\"; FileSys.chDir \"%s\""
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sml-prompt-regexp "^- *"
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sml-error-regexp sml-mosml-error-regexp
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sml-error-parser 'sml-mosml-error-parser)
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(sml-run cmd sml-default-arg)))
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;;; Do the default setup on loading this file.
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;; setqing these two may override user's hooked defaults. users
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;; therefore need load this file before setting sml-program-name or
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;; sml-default-arg in their inferior-sml-load-hook. sorry.
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(setq sml-program-name "mosml"
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sml-default-arg "")
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;; same sort of problem here too: users should to setq-default these
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;; after this file is loaded, on inferior-sml-load-hook. as these are
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;; buffer-local, users can instead set them on inferior-sml-mode-hook.
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(setq-default sml-use-command "use \"%s\""
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sml-cd-command "load \"FileSys\"; FileSys.chDir \"%s\""
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sml-prompt-regexp "^- *"
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sml-error-regexp sml-mosml-error-regexp
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sml-error-parser 'sml-mosml-error-parser)
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;;; sml-mosml.el endeded
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