[/ 
  Copyright 2007 John Maddock.
  Distributed under the Boost Software License, Version 1.0.
  (See accompanying file LICENSE_1_0.txt or copy at
  http://www.boost.org/LICENSE_1_0.txt).
]

[section:add_const add_const]

   template <class T>
   struct add_const
   {
      typedef __below type;
   };
   
   template <class T> using add_const_t = typename add_const<T>::type; // C++11 and above

__type The same type as `T const` for all `T`.  

__std_ref 3.9.3.

__header ` #include <boost/type_traits/add_const.hpp>` or ` #include <boost/type_traits.hpp>`

[table Examples

[ [Expression] [Result Type]]

[[`add_const<int>::type`][`int const`]]

[[`add_const<int&>::type`] [`int&`]]

[[`add_const<int*>::type`] [`int* const`]]

[[`add_const<int const>::type`] [`int const`]]

]

[all_compilers]

[endsect]