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Explain when to use make-variable-buffer-local.

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Richard M. Stallman 1995-10-09 19:39:45 +00:00
parent b1c7e43439
commit ab4b18358f
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9
lispref/variables.texi
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@ -1213,6 +1213,15 @@ buffer-local, so that any subsequent attempt to set it will make it
local to the current buffer at the time.
The value returned is @var{variable}.
@strong{Note:} It is a mistake to use @code{make-variable-buffer-local}
for user-option variables, simply because users @emph{might} want to
customize them differently in different buffers. Users can make any
variable local, when they wish to.
The main use of @code{make-variable-buffer-local} is when a variable is
used for internal purposes, and the Lisp program depends on having
separate values in separate buffers.
@end deffn
@defun local-variable-p variable &optional buffer