From 60a544c8795bc2c355099f74a9b0fda795b13c6a Mon Sep 17 00:00:00 2001
From: Hauke Heibel <hauke.heibel@gmail.com>
Date: Fri, 26 Nov 2010 16:56:03 +0100
Subject: [PATCH] Added STL like (add|remove)_const. Fixed
 add_const_on_value_type for "const T* const".

---
 Eigen/src/Core/util/Meta.h | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/Eigen/src/Core/util/Meta.h b/Eigen/src/Core/util/Meta.h
index 2c8ee26a1..28d7189b5 100644
--- a/Eigen/src/Core/util/Meta.h
+++ b/Eigen/src/Core/util/Meta.h
@@ -54,6 +54,11 @@ template<typename T> struct remove_pointer { typedef T type; };
 template<typename T> struct remove_pointer<T*> { typedef T type; };
 template<typename T> struct remove_pointer<T*const> { typedef T type; };
 
+template <class T> struct remove_const { typedef T type; };
+template <class T> struct remove_const<const T> { typedef T type; };
+template <class T> struct remove_const<const T[]> { typedef T type[]; };
+template <class T, unsigned int Size> struct remove_const<const T[Size]> { typedef T type[Size]; };
+
 template<typename T> struct remove_const_on_value_type { typedef T type; };
 template<typename T> struct remove_const_on_value_type<const T> { typedef T type; };
 template<typename T> struct remove_const_on_value_type<T const &> { typedef T & type; };
@@ -83,12 +88,13 @@ template<> struct is_arithmetic<unsigned long> { enum { value = true }; };
 template<> struct is_arithmetic<signed long long>   { enum { value = true }; };
 template<> struct is_arithmetic<unsigned long long> { enum { value = true }; };
 
+template <class T> struct add_const { typedef const T type; };
+template <class T> struct add_const<T&> { typedef T& type; };
+
 template<typename T> struct add_const_on_value_type            { typedef const T type;  };
-template<typename T> struct add_const_on_value_type<const T>   { typedef const T type;  };
-template<typename T> struct add_const_on_value_type<T&>        { typedef const T& type; };
-template<typename T> struct add_const_on_value_type<const T&>  { typedef const T& type; };
-template<typename T> struct add_const_on_value_type<T*>        { typedef const T* type; };
-template<typename T> struct add_const_on_value_type<const T*>  { typedef const T* type; };
+template<typename T> struct add_const_on_value_type<T&>        { typedef T const& type; };
+template<typename T> struct add_const_on_value_type<T*>        { typedef T const* type; };
+template<typename T> struct add_const_on_value_type<T* const>  { typedef const T* const type; };
 
 template<typename T> struct makeconst_return_type
 {