From: Karl Williamson <public@khwilliamson.com>
Date: Mon, 24 Dec 2012 02:44:03 +0000 (-0700)
Subject: regcomp.c: Add comment, Note for 3018b8238
X-Git-Tag: upstream/5.20.0~4366
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ff7674db17214571691c16485434c62efdfcd8d9;p=platform%2Fupstream%2Fperl.git

regcomp.c: Add comment, Note for 3018b8238

This adds a comment for this code, which I mistakenly included in commit
3018b823898645e44b8c37c70ac5c6302b031381, and should have been in its
own commit.  The code optimizes something that has a quantifier of zero
into a NOTHING node.
---

diff --git a/regcomp.c b/regcomp.c
index 1a746ca..c28ea5e 100644
--- a/regcomp.c
+++ b/regcomp.c
@@ -9402,7 +9402,7 @@ S_regpiece(pTHX_ RExC_state_t *pRExC_state, I32 *flagp, U32 depth)
                 ret = reg_node(pRExC_state, OPFAIL);
                 return ret;
             }
-            else if (max == 0) {
+            else if (max == 0) {    /* replace {0} with a nothing node */
                 if (SIZE_ONLY) {
                     RExC_size = PREVOPER(RExC_size) - regarglen[(U8)NOTHING];
                 }