safe-local-variable-values can store name/value pairs that are safe as file-local or directory-local. However sometimes I want to say any value is valid for a given variable. The manual page I linked to says that any integer value is considered safe for
fill-column. Is there a way to do this for my own variables?
safe-local-variable property to a function that validates the value. For example,
fill-column has a
safe-local-variable property set to
(lambda (x) t) as the validation function if any value is valid.
(defvar my-variable-with-any-safe-value …) (put 'my-variable-with-any-safe-value 'safe-local-variable (lambda (x) t))
(defcustom my-variable-with-any-safe-value … :safe (lambda (x) t))
Having any valid value is pretty rare. It's far more common to restrict to a specific type, e.g.