Variable: compilation--previous-directory-cache

compilation--previous-directory-cache is a buffer-local variable defined in compile.el.gz.

Documentation

A pair (POS . RES) caching the result of previous directory search.

Basically, this pair says that calling
   (previous-single-property-change POS 'compilation-directory)
returned RES, i.e. there is no change of compilation-directory between POS and RES.

Source Code

;; Defined in /usr/src/emacs/lisp/progmodes/compile.el.gz
(defvar-local compilation--previous-directory-cache nil
  "A pair (POS . RES) caching the result of previous directory search.
Basically, this pair says that calling
   (previous-single-property-change POS \\='compilation-directory)
returned RES, i.e. there is no change of `compilation-directory' between
POS and RES.")