[/ Copyright 2014 Peter Dimov Distributed under the Boost Software License, Version 1.0. See accompanying file LICENSE_1_0.txt or copy at http://boost.org/LICENSE_1_0.txt ] [section:is_same is_same] [simplesect Authors] * Peter Dimov [endsimplesect] [section Header ] [warning This component is deprecated and will be removed in a future release. Users are recommended to use `boost::is_same` from [@http://www.boost.org/doc/libs/release/libs/type_traits/doc/html/index.html Boost.TypeTraits] or `std::is_same` from C++ standard library `` instead.] The header `` defines the class template `boost::core::is_same`. It defines a nested integral constant `value` which is `true` when `T1` and `T2` are the same type, and `false` when they are not. In tandem with `BOOST_TEST_TRAIT_TRUE` and `BOOST_TEST_TRAIT_FALSE`, `is_same` is useful for writing tests for traits classes that have to define specific nested types. [section Synopsis] `` namespace boost { namespace core { template struct is_same; } } `` [endsect] [section Example] `` #include #include template struct X { typedef T& type; }; using boost::core::is_same; int main() { BOOST_TEST_TRAIT_TRUE(( is_same::type, int&> )); return boost::report_errors(); } `` [endsect] [endsect] [endsect]