From e004bc16a1304822226b5b1ceebdb899d72ee538 Mon Sep 17 00:00:00 2001
From: Luca Barbato <lu_zero@gentoo.org>
Date: Fri, 4 May 2012 10:03:42 -0700
Subject: doc: clarify check for NULL pointer style

Our code should be terse and clear.
---
 doc/developer.texi | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'doc/developer.texi')

diff --git a/doc/developer.texi b/doc/developer.texi
index de642396dc..fed28cdbcd 100644
--- a/doc/developer.texi
+++ b/doc/developer.texi
@@ -73,6 +73,10 @@ const char *avfilter_configuration(void)
 @}
 @end example
 @item
+Do not check for NULL values by comparison, @samp{if (p)} and
+@samp{if (!p)} are correct; @samp{if (p == NULL)} and @samp{if (p != NULL)}
+are not.
+@item
 In case of a single-statement if, no curly braces are required:
 @example
 if (!pic || !picref)
-- 
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