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| author | Juanma Barranquero <lekktu@gmail.com> | 2014-03-19 00:31:17 +0100 |
|---|---|---|
| committer | Juanma Barranquero <lekktu@gmail.com> | 2014-03-19 00:31:17 +0100 |
| commit | 6b88e570d87bbf8e3e36f6cb25a3791d047e8c35 (patch) | |
| tree | b112a3e1599406ab812dc1c42c01a86443db72c4 /lisp/custom.el | |
| parent | 4d99c93d27d47ff9f5fb941fe92e3b4b9cf5cf43 (diff) | |
| download | emacs-6b88e570d87bbf8e3e36f6cb25a3791d047e8c35.tar.gz | |
Recommend not modifying :set's value arg in defcustom (bug#16755).
* doc/lispref/customize.texi (Variable Definitions):
* lisp/custom.el (defcustom): Recommend avoiding
destructive modification of the value argument of :set.
Diffstat (limited to 'lisp/custom.el')
| -rw-r--r-- | lisp/custom.el | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/lisp/custom.el b/lisp/custom.el index 09431c454ec..c30ad7cb213 100644 --- a/lisp/custom.el +++ b/lisp/custom.el @@ -232,9 +232,10 @@ The following keywords are meaningful: given in the `defcustom' call. The default is `custom-initialize-reset'. :set VALUE should be a function to set the value of the symbol - when using the Customize user interface. - It takes two arguments, the symbol to set and the value to - give it. The default choice of function is `set-default'. + when using the Customize user interface. It takes two arguments, + the symbol to set and the value to give it. The function should + not modify its value argument destructively. The default choice + of function is `set-default'. :get VALUE should be a function to extract the value of symbol. The function takes one argument, a symbol, and should return the current value for that symbol. The default choice of function |