From 7cbb29f61e0c5d174e74ef4660ae125d3af18981 Mon Sep 17 00:00:00 2001
From: vitaut <victor.zverovich@gmail.com>
Date: Wed, 25 Nov 2015 08:27:46 -0800
Subject: [PATCH] Make FormatBuf::size() const

---
 format.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/format.h b/format.h
index 6cffc105..20aac4cb 100644
--- a/format.h
+++ b/format.h
@@ -1832,7 +1832,7 @@ class FormatBuf : public std::basic_streambuf<Char> {
     return ch;
   }
 
-  size_t size() {
+  size_t size() const {
     return this->pptr() - start_;
   }
 };