From 41a673db617e9afe03f8403cfb4be3f13618165e Mon Sep 17 00:00:00 2001
From: Antony Polukhin <antoshkka@gmail.com>
Date: Mon, 2 Apr 2012 15:33:46 +0000
Subject: [PATCH] Fixes #6717 (now also setting precision for float types
 conversion when using iostreams)

[SVN r77716]
---
 include/boost/lexical_cast.hpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/include/boost/lexical_cast.hpp b/include/boost/lexical_cast.hpp
index 438ee9c..cb7ae12 100644
--- a/include/boost/lexical_cast.hpp
+++ b/include/boost/lexical_cast.hpp
@@ -1254,7 +1254,7 @@ namespace boost
             {
 #if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_LOCALE)
                 // If you have compilation error at this point, than your STL library
-                // unsupports such conversions. Try updating it.
+                // does not support such conversions. Try updating it.
                 BOOST_STATIC_ASSERT((boost::is_same<char, CharT>::value));
 #endif
                 bool const result = !(out_stream << input).fail();
@@ -1279,8 +1279,10 @@ namespace boost
             }
 
             template <class T, class SomeCharT>
-            bool shl_real_type(const T& val, SomeCharT*, SomeCharT*) 
+            bool shl_real_type(const T& val, SomeCharT* begin, SomeCharT*& end)
             {
+                if (put_inf_nan(begin, end, val)) return true;
+                lcast_set_precision(out_stream, &val);
                 return shl_input_streamable(val);
             }