From 393604e5bf4ce15df7342fdc094900fd1be2b39f Mon Sep 17 00:00:00 2001
From: JSDurand <mmemmew@gmail.com>
Date: Mon, 8 Feb 2021 23:36:26 +0800
Subject: Constantly growing

A lot of improvements.
---
 completion-conf.el | 48 +++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 47 insertions(+), 1 deletion(-)

(limited to 'completion-conf.el')

diff --git a/completion-conf.el b/completion-conf.el
index 1ae21e2..ed28b06 100644
--- a/completion-conf.el
+++ b/completion-conf.el
@@ -31,7 +31,7 @@
 (require 'minibuffer)
 (require 'simple)
 
-(setq completion-styles '(initials substring partial-completion flex))
+(setq completion-styles '(initials substring partial-completion regex flex))
 (setq completion-category-defaults nil)
 (setq completion-flex-nospace nil)
 (setq completion-pcm-complete-word-inserts-delimiters t)
@@ -88,6 +88,52 @@ minibuffer as usual."
   (remove-hook 'minibuffer-setup-hook 'durand-headlong-minibuffer-setup-hook)
   (remove-hook 'minibuffer-exit-hook 'durand-headlong-minibuffer-exit-hook))
 
+;;;###autoload
+(defun regex-try-completion (string table pred point &optional metadata)
+  "The function that tries to complete STRING using completion table \
+TABLE for the `regex' style.
+Only the elements that satisfy the predicate PRED are considered.
+
+POINT is the position of point within STRING.
+
+The return value is nil if there is no completion, and is t if
+STRING is the only possible completion. It is a pair
+
+\(NEWSTRING . NEWPOINT)
+
+otherwise, where NEWSTRING is the completed result and NEWPOINT
+is the new position for point."
+  (let* ((completion-regexp-list (cons string completion-regexp-list))
+         (result (try-completion "" table pred)))
+    (cond
+     ;; For nil values we don't have to return nil explicitly.
+     ((null result) nil)
+     ((eq result t))
+     ((stringp result) (cons result (length result))))))
+
+;;;###autoload
+(defun regex-all-completion (string table pred point &optional metadata)
+  "List the possible completions of STRING in completion table \
+TABLE for the style `regex'.
+Only the elements of TABLE that satisfy the predicate PRED are
+considered. POINT is the position of point within STRING.
+
+The return value is a list of completions and may contain the
+base-size in the last `cdr'."
+  (let ((completion-regexp-list (cons string completion-regexp-list)))
+    (all-completions "" table pred)))
+
+(let ((style-elements
+       (list #'regex-try-completion
+             #'regex-all-completion
+             "Simple regular expression completion.
+This considers the input as the regular expression itself." ))
+      (assoc-result (assoc 'regex completion-styles-alist)))
+  (cond
+   (assoc-result (setcdr assoc-result style-elements))
+   ((setq completion-styles-alist
+          (cons (cons 'regex style-elements) completion-styles-alist)))))
+
 
 (provide 'completion-conf)
 ;;; completion-conf.el ends here
-- 
cgit v1.2.3-18-g5258