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;;; sml-util.el --- Utility functions for sml-mode
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;; Copyright (C) 1999-2000 Stefan Monnier <monnier@cs.yale.edu>
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;;
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;; This program is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2 of the License, or
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;; (at your option) any later version.
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;;
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with this program; if not, write to the Free Software
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;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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;;; Commentary:
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;;; Code:
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(require 'cl) ;for `reduce'
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(require 'sml-compat)
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;;
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(defun flatten (ls &optional acc)
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(if (null ls) acc
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(let ((rest (flatten (cdr ls) acc))
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(head (car ls)))
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(if (listp head)
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(flatten head rest)
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(cons head rest)))))
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(defun sml-preproc-alist (al)
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"Expand an alist AL where keys can be lists of keys into a normal one."
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(reduce (lambda (x al)
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(let ((k (car x))
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(v (cdr x)))
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(if (consp k)
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(append (mapcar (lambda (y) (cons y v)) k) al)
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(cons x al))))
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al
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:initial-value nil
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:from-end t))
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;;;
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;;; defmap
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;;;
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(defun custom-create-map (m bs args)
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(let (inherit dense suppress)
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(while args
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(let ((key (first args))
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(val (second args)))
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(cond
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((eq key :dense) (setq dense val))
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((eq key :inherit) (setq inherit val))
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((eq key :group) )
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;;((eq key :suppress) (setq suppress val))
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(t (message "Uknown argument %s in defmap" key))))
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(setq args (cddr args)))
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(unless (keymapp m)
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(setq bs (append m bs))
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(setq m (if dense (make-keymap) (make-sparse-keymap))))
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(dolist (b bs)
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(let ((keys (car b))
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(binding (cdr b)))
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(dolist (key (if (consp keys) keys (list keys)))
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(cond
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((symbolp key)
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(substitute-key-definition key binding m global-map))
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((null binding)
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(unless (keymapp (lookup-key m key)) (define-key m key binding)))
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((let ((o (lookup-key m key)))
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(or (null o) (numberp o) (eq o 'undefined)))
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(define-key m key binding))))))
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(cond
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((keymapp inherit) (set-keymap-parent m inherit))
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((consp inherit) (set-keymap-parents m inherit)))
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m))
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(defmacro defmap (m bs doc &rest args)
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`(defconst ,m
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(custom-create-map (if (boundp ',m) ,m) ,bs ,(cons 'list args))
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,doc))
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;; defsyntax ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(defun custom-create-syntax (css args)
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(let ((st (make-syntax-table (cadr (memq :copy args)))))
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(dolist (cs css)
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(let ((char (car cs))
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(syntax (cdr cs)))
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(if (sequencep char)
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(mapcar* (lambda (c) (modify-syntax-entry c syntax st)) char)
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(modify-syntax-entry char syntax st))))
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st))
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(defmacro defsyntax (st css doc &rest args)
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`(defconst ,st (custom-create-syntax ,css ,(cons 'list args)) ,doc))
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;;;;
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;;;; Compatibility info
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;;;;
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(defvar sml-builtin-nested-comments-flag
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(ignore-errors
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(not (equal (let ((st (make-syntax-table)))
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(modify-syntax-entry ?\* ". 23n" st) st)
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(let ((st (make-syntax-table)))
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(modify-syntax-entry ?\* ". 23" st) st))))
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"Non-nil means this Emacs understands the `n' in syntax entries.")
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(provide 'sml-util)
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;;; sml-util.el ends here
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