Handle varalias chains, custom variables in #'user-variable-p. src/ChangeLog addition: 2008-08-23 Aidan Kehoe <kehoea@parhasard.net> * eval.c (Fuser_variable_p): Moved to symbols.c * symbols.c (Fcustom_variable_p): Moved here from custom.el. (user_variable_alias_check_fun): Mapper function used in `user-variable-p'. (Fuser_variable_p): Moved here from eval.c, to allow it to examine the variable alias chain. Expanded to check each entry in the variable alias chain for signs of being a user variable; documentation updated, noting the differences between GNU's behaviour and ours (ours is a little more sensible) (map_varalias_chain): New. Given a C function, call it at least once for each symbol in a symbol's varalias chain, signalling an error if there's a cycle, and returning immediately if the function returns something other than Qzero. (Fdefvaralias): Correct the use of the word "alias" in the docstring and in the argument name. Motivate this in a comment. Add support for a DOCSTRING argument, something GNU has too, and document this * gc.c (vars_of_gc): Start the docstring of `garbage-collection-messages' with an asterisk, to indicate that it's a user variable. lisp/ChangeLog addition: 2008-08-23 Aidan Kehoe <kehoea@parhasard.net> * custom.el: Move #'custom-variable-p to C, since it's now called from #'user-variable-p.

/* XPM */
static char *folder[] = {
/* width height num_colors chars_per_pixel */
"    17    17        4            1",
/* colors */
". c #000000",
"a c #a8b038",
"b c #f8f800",
"c s None c None",
/* pixels */
"ccccccccccccccccc",
"ccccccccccccccccc",
"ccccccccccccccccc",
"ccccccccccccccccc",
"cccccccccaaaaaacc",
"ccccccccaaaaaaacc",
"cc......a.a.a.aac",
"c.bbbbbbbbbbbbb.c",
".bbbbbbbbbbbbbb.c",
".bbbbbbbbbbbbbb.c",
".bbbbbbbbbbbbbb.c",
".bbbbbbbbbbbbbb.c",
".bbbbbbbbbbbbbb.c",
".bbbbbbbbbbbbbb.c",
".bbbbbbbbbbbbbb.c",
".bbbbbbbbbbbbbb.c",
"a..............ac"
};