Persistent storage for Emacs, returning nil on failure.
(require 'persistent-soft) (persistent-soft-store 'hundred 100 "mydatastore") (persistent-soft-fetch 'hundred "mydatastore") ; 100 (persistent-soft-fetch 'thousand "mydatastore") ; nil ;; quit and restart Emacs (persistent-soft-fetch 'hundred "mydatastore") ; 100
This is a wrapper around pcache.el, providing "soft" fetch and store routines which never throw an error, but instead return nil on failure.
There is no end-user interface for this library. It is only useful from other Lisp code.
The following functions are provided:
persistent-soft-store
persistent-soft-fetch
persistent-soft-exists-p
persistent-soft-flush
persistent-soft-location-readable
persistent-soft-location-destroy
To use persistent-soft, place the persistent-soft.el library somewhere Emacs can find it, and add the following to your ~/.emacs file:
(require 'persistent-soft)
Using pcache with a more recent version of CEDET gives
Unsafe call to `eieio-persistent-read'.
eieio-persistent-read: Wrong type argument: class-p, nil
This library provides something of a workaround.
Persistent-soft is a wrapper around pcache which is a wrapper around eieio. Therefore, persistent-soft should probably be rewritten to use eieio directly or recast as a patch to pcache.
Compatibility and RequirementsGNU Emacs version 24.4-devel : yes, at the time of writing
GNU Emacs version 24.3 : yes
GNU Emacs version 23.3 : yes
GNU Emacs version 22.3 and lower : no
Uses if present: pcache.el (all operations are noops when not present)
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