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- // Copyright (C) 2014, Andrzej Krzemienski.
- //
- // Use, modification, and distribution is subject to 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)
- //
- // See http://www.boost.org/lib/optional for documentation.
- //
- // You are welcome to contact the author at:
- // akrzemi1@gmail.com
- //
- #include "boost/optional.hpp"
- //
- // THIS TEST SHOULD FAIL TO COMPILE
- //
- struct U
- {};
- struct T
- {
- explicit T(U const&) {}
- };
- U get_U() { return U(); }
- void test_verifying_the_implicit_conversion_to_bool()
- {
- boost::optional<T> opt;
- opt.value_or_eval(get_U);
- }
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