// Boost enable_if library // Copyright 2003 (c) The Trustees of Indiana University. // 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) // Authors: Jaakko Jarvi (jajarvi at osl.iu.edu) // Jeremiah Willcock (jewillco at osl.iu.edu) // Andrew Lumsdaine (lums at osl.iu.edu) #include #include #include #include using boost::enable_if; using boost::is_arithmetic; template struct not_ { BOOST_STATIC_CONSTANT( bool, value = !T::value ); }; template typename enable_if, bool>::type arithmetic_object(T t) { return true; } template typename enable_if >, bool>::type arithmetic_object(T t) { return false; } int main() { BOOST_TEST(arithmetic_object(1)); BOOST_TEST(arithmetic_object(1.0)); BOOST_TEST(!arithmetic_object("1")); BOOST_TEST(!arithmetic_object(static_cast(0))); return boost::report_errors(); }