1 // Copyright (C) 2003, Fernando Luis Cacciola Carballal. 2 // 3 // Use, modification, and distribution is subject to the Boost Software 4 // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at 5 // http://www.boost.org/LICENSE_1_0.txt) 6 // 7 // See http://www.boost.org/lib/optional for documentation. 8 // 9 // You are welcome to contact the author at: 10 // fernando_cacciola@hotmail.com 11 // 12 #include "boost/optional.hpp" 13 14 // 15 // THIS TEST SHOULD FAIL TO COMPILE 16 // test_deep_constantness()17void test_deep_constantness() 18 { 19 boost::optional<int> opt ; 20 boost::optional<int> const copt ; 21 22 *copt = opt ; // Cannot assign to "int const&" 23 } 24 25 26