From eafa7a587d12f503a16d6538f88029afe011051c Mon Sep 17 00:00:00 2001
From: Mario Lang <mlang@delysid.org>
Date: Mon, 1 Mar 2004 16:24:45 +0000
Subject: (chess-legal-plies): Add :candidates keyword to avoid calls to
 chess-search-position if the caller already knows the piece indices

---
 chess-ply.el | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'chess-ply.el')

diff --git a/chess-ply.el b/chess-ply.el
index 3ba0a40..826151d 100644
--- a/chess-ply.el
+++ b/chess-ply.el
@@ -305,6 +305,7 @@ KEYWORDS allowed are:
   :file <number 0 to 7> [can only be used if :piece is present]
   :index <coordinate index>
   :target <specific target index>
+  :candidates <list of inddices>
 
 These will constrain the plies generated to those matching the above
 criteria.
@@ -344,6 +345,8 @@ position object passed in."
       ;; more focused search
       (dolist (candidate
 	       (cond
+		((cadr (memq :candidates keywords))
+		 (cadr (memq :candidates keywords)))
 		((setq pos (cadr (memq :index keywords)))
 		 (list pos))
 		((setq file (cadr (memq :file keywords)))
-- 
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