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68 lines
1.7 KiB
C++
68 lines
1.7 KiB
C++
// Boost enable_if library
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// Copyright 2003 (c) The Trustees of Indiana University.
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// Use, modification, and distribution is subject to the Boost Software
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// Authors: Jaakko Jarvi (jajarvi at osl.iu.edu)
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// Jeremiah Willcock (jewillco at osl.iu.edu)
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// Andrew Lumsdaine (lums at osl.iu.edu)
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#include <boost/test/minimal.hpp>
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#include <boost/utility/enable_if.hpp>
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#include <boost/type_traits/is_arithmetic.hpp>
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using boost::enable_if_c;
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using boost::disable_if_c;
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using boost::enable_if;
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using boost::disable_if;
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using boost::is_arithmetic;
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template <class T, class Enable = void>
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struct tester;
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template <class T>
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struct tester<T, typename enable_if_c<is_arithmetic<T>::value>::type> {
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BOOST_STATIC_CONSTANT(bool, value = true);
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};
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template <class T>
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struct tester<T, typename disable_if_c<is_arithmetic<T>::value>::type> {
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BOOST_STATIC_CONSTANT(bool, value = false);
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};
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template <class T, class Enable = void>
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struct tester2;
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template <class T>
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struct tester2<T, typename enable_if<is_arithmetic<T> >::type> {
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BOOST_STATIC_CONSTANT(bool, value = true);
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};
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template <class T>
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struct tester2<T, typename disable_if<is_arithmetic<T> >::type> {
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BOOST_STATIC_CONSTANT(bool, value = false);
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};
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int test_main(int, char*[])
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{
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BOOST_CHECK(tester<int>::value);
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BOOST_CHECK(tester<double>::value);
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BOOST_CHECK(!tester<char*>::value);
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BOOST_CHECK(!tester<void*>::value);
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BOOST_CHECK(tester2<int>::value);
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BOOST_CHECK(tester2<double>::value);
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BOOST_CHECK(!tester2<char*>::value);
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BOOST_CHECK(!tester2<void*>::value);
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return 0;
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}
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