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Make mp_infoke SFINAE-friendly

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Peter Dimov
2017-05-19 15:37:49 +03:00
parent 1d1be2bbf4
commit 7100d10c7e
3 changed files with 44 additions and 5 deletions
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33
test/mp_invoke_sf.cpp Normal file
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// Copyright 2015, 2017 Peter Dimov.
//
// Distributed under 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
#include <boost/mp11/utility.hpp>
#include <boost/core/lightweight_test_trait.hpp>
#include <type_traits>
using boost::mp11::mp_invoke;
using boost::mp11::mp_quote;
using boost::mp11::mp_valid;
using boost::mp11::mp_identity_t;
int main()
{
BOOST_TEST_TRAIT_FALSE((mp_valid<mp_invoke>));
BOOST_TEST_TRAIT_FALSE((mp_valid<mp_invoke, void>));
BOOST_TEST_TRAIT_FALSE((mp_valid<mp_invoke, void, void>));
BOOST_TEST_TRAIT_FALSE((mp_valid<mp_invoke, void, void, void>));
using Qi = mp_quote<mp_identity_t>;
BOOST_TEST_TRAIT_FALSE((mp_valid<mp_invoke, Qi>));
BOOST_TEST_TRAIT_TRUE((mp_valid<mp_invoke, Qi, void>));
BOOST_TEST_TRAIT_FALSE((mp_valid<mp_invoke, Qi, void, void>));
return boost::report_errors();
}