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Document the force-coding-system-equivalency macro in coding.el. lisp/ChangeLog addition: 2009-02-04 Aidan Kehoe <kehoea@parhasard.net> * coding.el (force-coding-system-equivalency): Document this macro and the motivation for it.
author Aidan Kehoe <kehoea@parhasard.net>
date Wed, 04 Feb 2009 12:41:14 +0000
parents 8891b0477058
children e0a8715fdb1f
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4598:8891b0477058 4599:0347879667ed
244 244
245 245
246 ;;; Make certain variables equivalent to coding-system aliases: 246 ;;; Make certain variables equivalent to coding-system aliases:
247 (macrolet 247 (macrolet
248 ((force-coding-system-equivalency (&rest details-list) 248 ((force-coding-system-equivalency (&rest details-list)
249 "Certain coding-system aliases should correspond to certain variables.
250
251 This macro implements that correspondence. This gives us compatiblity with
252 other Mule implementations (which don't use the coding system aliases), and
253 a certain amount of freedom of implementation for XEmacs; using a variable's
254 value in C for every file operation or write to a terminal in C is probably
255 an improvement on the hash-table lookup(s) necessary for a coding system
256 alias, though we haven't profiled this yet to see if it makes a difference."
249 (loop for (alias variable-symbol) 257 (loop for (alias variable-symbol)
250 in details-list 258 in details-list
251 with result = (list 'progn) 259 with result = (list 'progn)
252 do 260 do
253 (push 261 (push