From 2aebad5dac3a8290f389b9821b1241a7275c2dda Mon Sep 17 00:00:00 2001
From: gfgtdf <tischpapier@gmail.com>
Date: Sun, 18 May 2014 22:51:06 +0200
Subject: [PATCH] derive bad_lexical_cast from std::exception

---
 src/util.hpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/util.hpp b/src/util.hpp
index 31f11c2d1bab..398c2945e3b0 100644
--- a/src/util.hpp
+++ b/src/util.hpp
@@ -73,7 +73,14 @@ inline double round_portable(double d) {
 	return (d >= 0.0) ? std::floor(d + 0.5) : std::ceil(d - 0.5);
 }
 
-struct bad_lexical_cast {};
+struct bad_lexical_cast : std::exception
+{
+public:
+	const char *what() const throw()
+	{
+		return "bad_lexical_cast";
+	}
+};
 
 template<typename To, typename From>
 To lexical_cast(From a)