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Clarify evaluation of :type arg in defcustom.

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Richard M. Stallman 2002-11-18 04:49:27 +00:00
parent 90620d3dfb
commit 5a65439ecc
1 changed files with 4 additions and 3 deletions
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7
lispref/customize.texi
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@ -344,9 +344,10 @@ which values are legitimate and (2) how to display the value in the
customization buffer for editing.
You specify the customization type in @code{defcustom} with the
@code{:type} keyword. The argument of @code{:type} is evaluated; since
types that vary at run time are rarely useful, normally you use a quoted
constant. For example:
@code{:type} keyword. The argument of @code{:type} is evaluated, but
only once when the @code{defcustom} is executed, so it isn't useful
for the value to vary. Normally we use a quoted constant. For
example:
@example
(defcustom diff-command "diff"