From d4d7612b5b14ad3b1fb2e21e04017369931ae203 Mon Sep 17 00:00:00 2001
From: Jay Berkenbilt <ejb@ql.org>
Date: Tue, 27 Dec 2016 14:34:13 -0500
Subject: [PATCH] Note about std::regex attempt

---
 TODO | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/TODO b/TODO
index afef2662..97213785 100644
--- a/TODO
+++ b/TODO
@@ -306,3 +306,8 @@ Index: QPDFWriter.cc
 
  * From github issue 2, provide more in-depth output for examining
    hint stream contents.
+
+ * An attempt was made to replace pcre with std::regex, but it failed
+   because std::regex lacks some features of PCRE that we use and
+   because the result was many times slower. The work was saved in
+   refs/attic/std-regex on github.