mirror of
https://github.com/boostorg/utility.git
synced 2025-05-08 18:34:02 +00:00
68 lines
1.7 KiB
C++
68 lines
1.7 KiB
C++
// 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 <boost/test/minimal.hpp>
|
|
|
|
#include <boost/utility/enable_if.hpp>
|
|
#include <boost/type_traits/is_arithmetic.hpp>
|
|
|
|
using boost::enable_if_c;
|
|
using boost::disable_if_c;
|
|
using boost::enable_if;
|
|
using boost::disable_if;
|
|
using boost::is_arithmetic;
|
|
|
|
template <class T, class Enable = void>
|
|
struct tester;
|
|
|
|
template <class T>
|
|
struct tester<T, typename enable_if_c<is_arithmetic<T>::value>::type> {
|
|
BOOST_STATIC_CONSTANT(bool, value = true);
|
|
};
|
|
|
|
template <class T>
|
|
struct tester<T, typename disable_if_c<is_arithmetic<T>::value>::type> {
|
|
BOOST_STATIC_CONSTANT(bool, value = false);
|
|
};
|
|
|
|
template <class T, class Enable = void>
|
|
struct tester2;
|
|
|
|
template <class T>
|
|
struct tester2<T, typename enable_if<is_arithmetic<T> >::type> {
|
|
BOOST_STATIC_CONSTANT(bool, value = true);
|
|
};
|
|
|
|
template <class T>
|
|
struct tester2<T, typename disable_if<is_arithmetic<T> >::type> {
|
|
BOOST_STATIC_CONSTANT(bool, value = false);
|
|
};
|
|
|
|
int test_main(int, char*[])
|
|
{
|
|
|
|
BOOST_CHECK(tester<int>::value);
|
|
BOOST_CHECK(tester<double>::value);
|
|
|
|
BOOST_CHECK(!tester<char*>::value);
|
|
BOOST_CHECK(!tester<void*>::value);
|
|
|
|
BOOST_CHECK(tester2<int>::value);
|
|
BOOST_CHECK(tester2<double>::value);
|
|
|
|
BOOST_CHECK(!tester2<char*>::value);
|
|
BOOST_CHECK(!tester2<void*>::value);
|
|
|
|
return 0;
|
|
}
|
|
|