1 // Copyright David Abrahams 2003. 2 // Distributed under the Boost Software License, Version 1.0. (See 3 // accompanying file LICENSE_1_0.txt or copy at 4 // http://www.boost.org/LICENSE_1_0.txt) 5 #ifndef IMPLICIT_CAST_DWA200356_HPP 6 # define IMPLICIT_CAST_DWA200356_HPP 7 8 namespace boost { 9 10 namespace detail { 11 12 template<class T> struct icast_identity 13 { 14 typedef T type; 15 }; 16 17 } // namespace detail 18 19 // implementation originally suggested by C. Green in 20 // http://lists.boost.org/MailArchives/boost/msg00886.php 21 22 // The use of identity creates a non-deduced form, so that the 23 // explicit template argument must be supplied 24 template <typename T> implicit_cast(typename boost::detail::icast_identity<T>::type x)25inline T implicit_cast (typename boost::detail::icast_identity<T>::type x) { 26 return x; 27 } 28 29 // incomplete return type now is here 30 //template <typename T> 31 //void implicit_cast (...); 32 33 } // namespace boost 34 35 36 #endif // IMPLICIT_CAST_DWA200356_HPP 37