From 0e4b0ae7ce57117a561f70fa51026d85b4702aaa Mon Sep 17 00:00:00 2001
From: Magnus Henoch <magnus.henoch@gmail.com>
Date: Wed, 4 Sep 2013 14:08:34 +0100
Subject: Add dict:is_empty/1 and orddict:is_empty/1

dict:size/1 runs in constant time, but orddict:size/1 does not.  With
this change, the two modules stay API compatible and gain a
constant-time function for checking whether a dictionary is empty.
---
 lib/stdlib/doc/src/dict.xml | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'lib/stdlib/doc/src/dict.xml')

diff --git a/lib/stdlib/doc/src/dict.xml b/lib/stdlib/doc/src/dict.xml
index b8cf61af80..6ff81b56ee 100644
--- a/lib/stdlib/doc/src/dict.xml
+++ b/lib/stdlib/doc/src/dict.xml
@@ -176,6 +176,13 @@ merge(Fun, D1, D2) ->
         <p>Returns the number of elements in a <c><anno>Dict</anno></c>.</p>
       </desc>
     </func>
+    <func>
+      <name name="is_empty" arity="1"/>
+      <fsummary>Return true if the dictionary is empty</fsummary>
+      <desc>
+        <p>Returns <c>true</c> if <c><anno>Dict</anno></c> has no elements, <c>false</c> otherwise.</p>
+      </desc>
+    </func>
     <func>
       <name name="store" arity="3"/>
       <fsummary>Store a value in a dictionary</fsummary>
-- 
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