From 06fc53d9ab92dcdb14631eb7d9c409800a296cb4 Mon Sep 17 00:00:00 2001
From: Kohei Takahashi <flast@flast.jp>
Date: Sun, 12 Apr 2015 21:47:22 +0900
Subject: [PATCH] Suppress always false warning with GCC.

---
 include/boost/spirit/home/qi/numeric/detail/numeric_utils.hpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/boost/spirit/home/qi/numeric/detail/numeric_utils.hpp b/include/boost/spirit/home/qi/numeric/detail/numeric_utils.hpp
index 7e96a3757f..19f2fe8d32 100644
--- a/include/boost/spirit/home/qi/numeric/detail/numeric_utils.hpp
+++ b/include/boost/spirit/home/qi/numeric/detail/numeric_utils.hpp
@@ -102,9 +102,17 @@ namespace boost { namespace spirit { namespace qi { namespace detail
         {
             if (Radix <= 10)
                 return (ch >= '0' && ch <= static_cast<Char>('0' + Radix -1));
+#ifdef BOOST_GCC
+            // GCC warns the condition, 'always false', if Radix is 10.
+# pragma GCC diagnostic push
+# pragma GCC diagnostic ignored "-Wlogical-op"
+#endif
             return (ch >= '0' && ch <= '9')
                 || (ch >= 'a' && ch <= static_cast<Char>('a' + Radix -10 -1))
                 || (ch >= 'A' && ch <= static_cast<Char>('A' + Radix -10 -1));
+#ifdef BOOST_GCC
+# pragma GCC diagnostic pop
+#endif
         }
 
         template <typename Char>