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Import from CVS: tag r21-2-37
author cvs
date Mon, 13 Aug 2007 11:36:19 +0200
parents 3ecd8885ac67
children 6780963faf78
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443:a8296e22da4e 444:576fb035e263
1 @c -*-texinfo-*- 1 @c -*-texinfo-*-
2 @c This is part of the XEmacs Lisp Reference Manual. 2 @c This is part of the XEmacs Lisp Reference Manual.
3 @c Copyright (C) 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc. 3 @c Copyright (C) 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
4 @c See the file lispref.texi for copying conditions. 4 @c See the file lispref.texi for copying conditions.
5 @setfilename ../../info/macros.info 5 @setfilename ../../info/macros.info
6 @node Macros, Loading, Functions, Top 6 @node Macros, Loading, Functions, Top
7 @chapter Macros 7 @chapter Macros
8 @cindex macros 8 @cindex macros
280 `(use the words ,@@(cdr list) as elements) 280 `(use the words ,@@(cdr list) as elements)
281 @result{} (use the words foo bar as elements) 281 @result{} (use the words foo bar as elements)
282 @end group 282 @end group
283 @end example 283 @end example
284 284
285 @quotation 285 @quotation
286 In older versions of Emacs (before XEmacs 19.12 or FSF Emacs version 286 In older versions of Emacs (before XEmacs 19.12 or FSF Emacs version
287 19.29), @samp{`} used a different syntax which required an extra level 287 19.29), @samp{`} used a different syntax which required an extra level
288 of parentheses around the entire backquote construct. Likewise, each 288 of parentheses around the entire backquote construct. Likewise, each
289 @samp{,} or @samp{,@@} substitution required an extra level of 289 @samp{,} or @samp{,@@} substitution required an extra level of
290 parentheses surrounding both the @samp{,} or @samp{,@@} and the 290 parentheses surrounding both the @samp{,} or @samp{,@@} and the
395 (princ (format "%d %d" i square)) 395 (princ (format "%d %d" i square))
396 (inc i))) 396 (inc i)))
397 @end group 397 @end group
398 @end smallexample 398 @end smallexample
399 399
400 Here is a macro definition that creates this expansion: 400 Here is a macro definition that creates this expansion:
401 401
402 @smallexample 402 @smallexample
403 @group 403 @group
404 (defmacro for (var from init to final do &rest body) 404 (defmacro for (var from init to final do &rest body)
405 "Execute a simple for loop: (for i from 1 to 10 do (print i))." 405 "Execute a simple for loop: (for i from 1 to 10 do (print i))."