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* variables.texi (Constant Variables): Distinguish from defconst

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variables.
(Defining Variables): Add cindex.
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Chong Yidong 2009-10-16 02:20:29 +00:00
parent 73874eb74c
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6
doc/lispref/ChangeLog
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@ -1,3 +1,9 @@
2009-10-16 Chong Yidong <cyd@stupidchicken.com>
* variables.texi (Constant Variables): Distinguish from defconst
variables.
(Defining Variables): Add cindex.
2009-10-15 Chong Yidong <cyd@stupidchicken.com>
* os.texi (Time of Day): Clarify that the microsecond part is

7
doc/lispref/variables.texi
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@ -134,6 +134,12 @@ starts with @samp{:}, interned in the standard obarray, and returns
@code{nil} otherwise.
@end defun
These constants are fundamentally different from the ``constants''
defined using the @code{defconst} special form (@pxref{Defining
Variables}). A @code{defconst} form serves to inform human readers
that you do not intend to change the value of a variable, but Emacs
does not raise an error if you actually change it.
@node Local Variables
@section Local Variables
@cindex binding local variables
@ -523,6 +529,7 @@ The @code{defvar} form returns @var{symbol}, but it is normally used
at top level in a file where its value does not matter.
@end defspec
@cindex constant variables
@defspec defconst symbol value [doc-string]
This special form defines @var{symbol} as a value and initializes it.
It informs a person reading your code that @var{symbol} has a standard