annotate lisp/lisp.el @ 5413:7910031dd78a

Add explicit GPLv3 or later to xpm and xbm graphics.
author Mats Lidell <matsl@xemacs.org>
date Sun, 24 Oct 2010 01:10:23 +0200
parents 308d34e9f07d
children 58b38d5b32d0
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1 ;;; lisp.el --- Lisp editing commands for XEmacs
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2
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3 ;; Copyright (C) 1985, 1986, 1994, 1997 Free Software Foundation, Inc.
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4
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5 ;; Maintainer: FSF
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6 ;; Keywords: lisp, languages, dumped
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7
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8 ;; This file is part of XEmacs.
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9
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10 ;; XEmacs is free software: you can redistribute it and/or modify it
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11 ;; under the terms of the GNU General Public License as published by the
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12 ;; Free Software Foundation, either version 3 of the License, or (at your
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13 ;; option) any later version.
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14
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15 ;; XEmacs is distributed in the hope that it will be useful, but WITHOUT
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16 ;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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17 ;; FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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18 ;; for more details.
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19
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20 ;; You should have received a copy of the GNU General Public License
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21 ;; along with XEmacs. If not, see <http://www.gnu.org/licenses/>.
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22
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23 ;;; Synched up with: Emacs/Mule zeta.
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24
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25 ;;; Commentary:
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26
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27 ;; This file is dumped with XEmacs.
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28
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29 ;; Lisp editing commands to go with Lisp major mode.
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30
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31 ;; 06/11/1997 - Use char-(after|before) instead of
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32 ;; (following|preceding)-char. -slb
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33
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34 ;;; Code:
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35
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36 ;; Note that this variable is used by non-lisp modes too.
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37 (defcustom defun-prompt-regexp nil
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38 "*Non-nil => regexp to ignore, before the character that starts a defun.
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39 This is only necessary if the opening paren or brace is not in column 0.
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40 See `beginning-of-defun'."
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41 :type '(choice (const :tag "none" nil)
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42 regexp)
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43 :group 'lisp)
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44
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45 (make-variable-buffer-local 'defun-prompt-regexp)
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46
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47 (defcustom parens-require-spaces t
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48 "Non-nil => `insert-parentheses' should insert whitespace as needed."
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49 :type 'boolean
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50 :group 'editing-basics
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51 :group 'lisp)
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52
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53 (defun forward-sexp (&optional count)
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54 "Move forward across one balanced expression (sexp).
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55 With non-nil COUNT, do it that many times. Negative COUNT means
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56 move backward across -COUNT balanced expressions."
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57 ;; XEmacs change (for zmacs regions)
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58 (interactive "_p")
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59 (or count (setq count 1))
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60 ;; XEmacs: evil hack! The other half of the evil hack below.
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61 (if (and (> count 0) (looking-at "#s(\\|#r[uU]\\{0,1\\}\""))
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62 (goto-char (1+ (- (point) (- (match-end 0) (match-beginning 0))))))
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63 (goto-char (or (scan-sexps (point) count) (buffer-end count)))
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64 (when (< count 0)
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65 (backward-prefix-chars)
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66 ;; XEmacs: evil hack! Skip back over #[sr] so that structures and raw
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67 ;; strings are read properly. the current cheesified syntax tables just
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68 ;; aren't up to this.
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69 (let* ((diff (- (point) (point-min)))
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70 (subject (buffer-substring (- (point) (min diff 3))
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71 (1+ (point))))
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72 (matched (string-match "#s(\\|#r[uU]\\{0,1\\}\"" subject)))
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73 (if matched
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74 (goto-char (1+ (- (point) (- (length subject) matched))))))))
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75
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76 (defun backward-sexp (&optional count)
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77 "Move backward across one balanced expression (sexp).
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78 With non-nil COUNT, do it that many times. Negative COUNT means
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79 move forward across -COUNT balanced expressions."
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80 ;; XEmacs change (for zmacs regions)
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81 (interactive "_p")
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82 (forward-sexp (- (or count 1))))
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83
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84 (defun mark-sexp (&optional count)
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85 "Set mark COUNT sexps from point.
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86 The place mark goes is the same place \\[forward-sexp] would
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87 move to with the same argument.
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88 Repeat this command to mark more sexps in the same direction."
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89 (interactive "p")
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90 (mark-something 'mark-sexp 'forward-sexp (or count 1)))
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91
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92 (defun forward-list (&optional count)
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93 "Move forward across one balanced group of parentheses.
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94 With non-nil COUNT, do it that many times.
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95 Negative COUNT means move backward across -COUNT groups of parentheses."
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96 ;; XEmacs change
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97 (interactive "_p")
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98 (goto-char (or (scan-lists (point) (or count 1) 0)
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99 (buffer-end (or count 1)))))
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100
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101 (defun backward-list (&optional count)
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102 "Move backward across one balanced group of parentheses.
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103 With non-nil COUNT, do it that many times.
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104 Negative COUNT means move forward across -COUNT groups of parentheses."
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105 ;; XEmacs change (for zmacs regions)
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106 (interactive "_p")
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107 (forward-list (- (or count 1))))
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108
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109 (defun down-list (&optional count)
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110 "Move forward down one level of parentheses.
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111 With non-nil COUNT, do this that many times.
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112 A negative COUNT means move backward but still go down a level."
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113 ;; XEmacs change (for zmacs regions)
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114 (interactive "_p")
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115 (or count (setq count 1))
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116 (let ((inc (if (> count 0) 1 -1)))
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117 (while (/= count 0)
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118 (goto-char (or (scan-lists (point) inc -1) (buffer-end count)))
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119 (setq count (- count inc)))))
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120
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121 (defun backward-up-list (&optional count)
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122 "Move backward out of one level of parentheses.
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123 With COUNT, do this that many times.
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124 A negative COUNT means move forward but still to a less deep spot."
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125 (interactive "_p")
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126 (up-list (- (or count 1))))
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127
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128 (defun up-list (&optional count)
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129 "Move forward out of one level of parentheses.
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130 With non-nil COUNT, do this that many times.
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131 A negative COUNT means move backward but still to a less deep spot.
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132 In Lisp programs, an argument is required."
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133 ;; XEmacs change (for zmacs regions)
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134 (interactive "_p")
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135 (or count (setq count 1))
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136 (let ((inc (if (> count 0) 1 -1)))
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137 (while (/= count 0)
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138 (goto-char (or (scan-lists (point) inc 1) (buffer-end count)))
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139 (setq count (- count inc)))))
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140
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141 (defun kill-sexp (&optional count)
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142 "Kill the sexp (balanced expression) following the cursor.
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143 With non-nil COUNT, kill that many sexps after the cursor.
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144 Negative COUNT means kill -COUNT sexps before the cursor."
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145 (interactive "p")
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146 (let ((opoint (point)))
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147 (forward-sexp (or count 1))
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148 (kill-region opoint (point))))
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149
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150 (defun backward-kill-sexp (&optional count)
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151 "Kill the sexp (balanced expression) preceding the cursor.
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152 With non-nil COUNT, kill that many sexps before the cursor.
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153 Negative COUNT means kill -COUNT sexps after the cursor."
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154 (interactive "p")
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155 (kill-sexp (- (or count 1))))
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156
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157
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158 ;; derived stuff from GNU Emacs
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159 (defvar beginning-of-defun-function nil
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160 "If non-nil, this function will be called by `beginning-of-defun-raw'.
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161 It will be called with one argument, which is a repetition count.
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162 It provides an alternative algorithm to find the beginning of the current
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163 defun instead of using the standard one implemented by `beginning-of-defun'.
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164 See also `defun-prompt-regexp' for minor tweaks.")
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165 (make-variable-buffer-local 'beginning-of-defun-function)
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166
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167 (defvar end-of-defun-function nil
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168 "If non-nil, this function will be called by `end-of-defun'.
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169 It will be called with no arguments. \(Repetition is implemented in
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170 `end-of-defun' by calling this function that many times.)
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171 This function provides an alternative algorithm to find the end
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172 of the current defun instead of using the standard one implemented by
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173 `end-of-defun'.
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174 ")
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175 (make-variable-buffer-local 'end-of-defun-function)
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176
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177 (defun beginning-of-defun (&optional count)
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178 "Move backward to the beginning of the current defun.
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179 With COUNT, do it that many times. Negative COUNT
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180 means move forward to -COUNTth following beginning of defun.
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181 Returns t unless search stops due to beginning or end of buffer.
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182
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183 In the default implementation provided by `beginning-of-defun-raw',
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184 a defun starts at a char with open-parenthesis syntax at the beginning
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185 of a line. If `defun-prompt-regexp' is non-nil, then a string which
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186 matches that regexp may precede the open-parenthesis. Alternatively,
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187 if `beginning-of-defun-function' is non-nil, that function is called,
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188 and none of the default processing is done.
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189
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190 If the beginning of defun function returns t, point moves to the
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191 beginning of the line containing the beginning of defun."
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192 ;; XEmacs change (for zmacs regions)
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193 (interactive "_p")
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194 (and (beginning-of-defun-raw count)
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195 (progn (beginning-of-line) t)))
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196
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197 (defun beginning-of-defun-raw (&optional count)
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198 "Move point to the character that starts a defun.
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199 This is identical to beginning-of-defun, except that point does not move
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200 to the beginning of the line when `defun-prompt-regexp' is non-nil."
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201 (interactive "p")
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202 (unless count (setq count 1))
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203 (if beginning-of-defun-function
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204 (funcall beginning-of-defun-function count)
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205 (and (< count 0) (not (eobp)) (forward-char 1))
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206 (and
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207 (re-search-backward (if defun-prompt-regexp
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208 (concat "^\\s(\\|"
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209 "\\(" defun-prompt-regexp "\\)\\s(")
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210 "^\\s(")
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211 nil 'move count)
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212 (progn (goto-char (1- (match-end 0)))) t)))
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213
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214 ;; XEmacs change (optional buffer parameter)
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215 (defun buffer-end (direction &optional buffer)
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216 "Return `point-max' of BUFFER if DIRECTION > 0, else return `point-min'.
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217 BUFFER defaults to the current buffer if omitted."
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218 (if (> direction 0) (point-max buffer) (point-min buffer)))
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219
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220 (defun end-of-defun (&optional count)
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221 "Move forward to next end of defun.
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222 Non-nil COUNT means do it that many times (default is 1).
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223 Negative COUNT means move back to -COUNTth preceding end of defun.
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224
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225 In the default implementation, the end of a defun is the end of the
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226 s-expression started at the character identified by `beginning-of-defun'.
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227
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228 If `end-of-defun-function' is non-nil, none of the default processing is
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229 done. For a repetition count greater than 1, `end-of-defun-function' is
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230 called that many times. If the repetition count is less than 1, nothing
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231 is done. \(This is a bug.)"
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232 ;; XEmacs change (for zmacs regions)
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233 (interactive "_p")
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234 (if (or (null count) (= count 0)) (setq count 1))
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235 (if end-of-defun-function
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236 (if (> count 0)
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237 (dotimes (i count)
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238 (funcall end-of-defun-function)))
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239 (let ((first t))
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240 (while (and (> count 0) (< (point) (point-max)))
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241 (let ((pos (point))) ; XEmacs -- remove unused npos.
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242 (while (progn
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243 (if (and first
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244 (progn
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245 (end-of-line 1)
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246 (beginning-of-defun-raw 1)))
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247 nil
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248 (or (bobp) (backward-char 1))
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249 (beginning-of-defun-raw -1))
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250 (setq first nil)
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251 (forward-list 1)
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252 (skip-chars-forward " \t")
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253 (if (looking-at "\\s<\\|\n")
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254 (forward-line 1))
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255 (<= (point) pos))))
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256 (setq count (1- count)))
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257 (while (< count 0)
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258 (let ((pos (point)))
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259 (beginning-of-defun-raw 1)
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260 (forward-sexp 1)
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261 (forward-line 1)
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262 (if (>= (point) pos)
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263 (if (beginning-of-defun-raw 2)
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264 (progn
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265 (forward-list 1)
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266 (skip-chars-forward " \t")
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267 (if (looking-at "\\s<\\|\n")
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268 (forward-line 1)))
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269 (goto-char (point-min)))))
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270 (setq count (1+ count))))))
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271
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272 (defun mark-defun ()
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273 "Put mark at end of this defun, point at beginning.
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274 The defun marked is the one that contains point or follows point."
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275 (interactive)
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276 (push-mark (point))
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277 (end-of-defun)
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278 (push-mark (point) nil t)
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279 (beginning-of-defun)
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280 (re-search-backward "^\n" (- (point) 1) t))
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281
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282 (defun narrow-to-defun (&optional arg)
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283 "Make text outside current defun invisible.
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284 The defun visible is the one that contains point or follows point.
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285 Optional ARG is currently ignored."
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286 (interactive)
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287 (save-excursion
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288 (widen)
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289 (end-of-defun)
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290 (let ((end (point)))
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291 (beginning-of-defun)
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292 (narrow-to-region (point) end))))
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293
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294 (defun insert-parentheses (count)
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295 "Enclose following COUNT sexps in parentheses. Leave point after open-paren.
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296 A negative COUNT encloses the preceding -COUNT sexps instead.
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297 COUNT defaults to zero: just insert `()' and leave point between.
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298 If `parens-require-spaces' is non-nil, this command also inserts a space
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299 before and after, depending on the surrounding characters."
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300 (interactive "P")
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301 (if count (setq count (prefix-numeric-value count))
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302 (setq count 0))
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303 (cond ((> count 0) (skip-chars-forward " \t"))
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304 ((< count 0) (forward-sexp count) (setq count (- count))))
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305 (and parens-require-spaces
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306 (not (bobp))
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307 (memq (char-syntax (char-before (point))) '(?w ?_ ?\) ))
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308 (insert " "))
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309 (insert ?\()
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310 (save-excursion
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311 (or (eq count 0) (forward-sexp count))
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312 (insert ?\))
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313 (and parens-require-spaces
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314 (not (eobp))
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315 (memq (char-syntax (char-after (point))) '(?w ?_ ?\( ))
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316 (insert " "))))
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317
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318 (defun move-past-close-and-reindent ()
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319 "Move past next `)', delete indentation before it, then indent after it."
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320 (interactive)
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321 (up-list 1)
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322 (backward-char 1)
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323 (while (save-excursion ; this is my contribution
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324 (let ((before-paren (point)))
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325 (back-to-indentation)
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326 (= (point) before-paren)))
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327 (delete-indentation))
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328 (forward-char 1)
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329 (newline-and-indent))
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330
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331 (defun lisp-complete-symbol ()
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332 "Perform completion on Lisp symbol preceding point.
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333 Compare that symbol against the known Lisp symbols.
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334
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335 The context determines which symbols are considered.
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336 If the symbol starts just after an open-parenthesis, only symbols
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337 with function definitions are considered. Otherwise, all symbols with
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338 function definitions, values or properties are considered."
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339 (interactive)
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340 (let* ((end (point))
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341 (buffer-syntax (syntax-table))
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342 (beg (unwind-protect
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343 (save-excursion
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344 ;; XEmacs change
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345 (if emacs-lisp-mode-syntax-table
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346 (set-syntax-table emacs-lisp-mode-syntax-table))
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347 (backward-sexp 1)
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348 (while (eq (char-syntax (char-after (point))) ?\')
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349 (forward-char 1))
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350 (point))
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351 (set-syntax-table buffer-syntax)))
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352 (pattern (buffer-substring beg end))
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353 (predicate
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354 (if (eq (char-after (1- beg)) ?\()
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355 'fboundp
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356 ;; XEmacs change
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357 #'(lambda (sym)
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358 (or (boundp sym) (fboundp sym)
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359 (symbol-plist sym)))))
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360 (completion (try-completion pattern obarray predicate)))
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361 (cond ((eq completion t))
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362 ((null completion)
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363 (message "Can't find completion for \"%s\"" pattern)
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364 (ding))
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365 ((not (string= pattern completion))
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366 (delete-region beg end)
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367 (insert completion))
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368 (t
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369 (message "Making completion list...")
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370 (let ((list (all-completions pattern obarray predicate))
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371 ;FSFmacs crock unnecessary in XEmacs
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372 ;see minibuf.el
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373 ;(completion-fixup-function
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374 ; (function (lambda () (if (save-excursion
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375 ; (goto-char (max (point-min)
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376 ; (- (point) 4)))
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377 ; (looking-at " <f>"))
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378 ; (forward-char -4))))
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379 )
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380 (or (eq predicate 'fboundp)
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381 (let (new)
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382 (while list
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383 (setq new (cons (if (fboundp (intern (car list)))
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384 (list (car list) " <f>")
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385 (car list))
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386 new))
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387 (setq list (cdr list)))
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388 (setq list (nreverse new))))
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389 (with-output-to-temp-buffer "*Completions*"
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390 (display-completion-list list)))
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391 (message "Making completion list...%s" "done")))))
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392
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393 ;;; lisp.el ends here