From b1b53059847d8c5eb891e65387c4b0c044fdc58f Mon Sep 17 00:00:00 2001
From: Antony Polukhin <antoshkka@gmail.com>
Date: Thu, 26 Apr 2012 17:59:17 +0000
Subject: [PATCH] Merge from trunk: * fixed #6812 (now converting "." to float
 type throws bad_lexical_cast)

[SVN r78211]
---
 include/boost/lexical_cast.hpp         | 3 ++-
 test/lexical_cast_float_types_test.cpp | 2 ++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/boost/lexical_cast.hpp b/include/boost/lexical_cast.hpp
index 2e5c140..fb76d29 100644
--- a/include/boost/lexical_cast.hpp
+++ b/include/boost/lexical_cast.hpp
@@ -1062,9 +1062,10 @@ namespace boost {
                            ) return false;
 #endif
 
-                        if(*begin == decimal_point){
+                        if(*begin == decimal_point) {
                             ++ begin;
                             found_decimal = true;
+                            if (!found_number_before_exp && begin==end) return false;
                             continue;
                         }else {
                             if (!found_number_before_exp) return false;
diff --git a/test/lexical_cast_float_types_test.cpp b/test/lexical_cast_float_types_test.cpp
index 808f456..60db0e1 100755
--- a/test/lexical_cast_float_types_test.cpp
+++ b/test/lexical_cast_float_types_test.cpp
@@ -261,6 +261,7 @@ void test_converion_to_float_types()
     BOOST_CHECK_THROW(lexical_cast<test_t>(".e"), bad_lexical_cast);
     BOOST_CHECK_THROW(lexical_cast<test_t>(".11111111111111111111111111111111111111111111111111111111111111111111ee"), bad_lexical_cast);
     BOOST_CHECK_THROW(lexical_cast<test_t>(".11111111111111111111111111111111111111111111111111111111111111111111e-"), bad_lexical_cast);
+    BOOST_CHECK_THROW(lexical_cast<test_t>("."), bad_lexical_cast);
 
     BOOST_CHECK_THROW(lexical_cast<test_t>("-B"), bad_lexical_cast);
     BOOST_CHECK_THROW(lexical_cast<test_t>("0xB"), bad_lexical_cast);
@@ -276,6 +277,7 @@ void test_converion_to_float_types()
     BOOST_CHECK_THROW(lexical_cast<test_t>("-"), bad_lexical_cast);
     BOOST_CHECK_THROW(lexical_cast<test_t>('\0'), bad_lexical_cast);
     BOOST_CHECK_THROW(lexical_cast<test_t>('-'), bad_lexical_cast);
+    BOOST_CHECK_THROW(lexical_cast<test_t>('.'), bad_lexical_cast);
 }
 
 template <class T>