From dc272078fcfea5c0f40f988b951025dce3ee9acf Mon Sep 17 00:00:00 2001
From: scopeInfinity <gagan1kumar@ymail.com>
Date: Fri, 11 Dec 2015 20:01:01 +0530
Subject: [PATCH] [type_traits] Fixed is_complex<T> with const types. Ticket
 #11840

---
 include/boost/type_traits/is_complex.hpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/boost/type_traits/is_complex.hpp b/include/boost/type_traits/is_complex.hpp
index 08210eb..7cf04b4 100644
--- a/include/boost/type_traits/is_complex.hpp
+++ b/include/boost/type_traits/is_complex.hpp
@@ -14,6 +14,9 @@
 namespace boost {
 
    template <class T> struct is_complex : public false_type {};
+   template <class T> struct is_complex<const T > : public is_complex<T>{};
+   template <class T> struct is_complex<volatile const T > : public is_complex<T>{};
+   template <class T> struct is_complex<volatile T > : public is_complex<T>{};
    template <class T> struct is_complex<std::complex<T> > : public true_type{};
 
 } // namespace boost