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Add mp_eval_if_q

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Peter Dimov committed 2017-05-19 03:22:53 +03:00
1 parent 93703f9c31
commit 1d1be2bbf4
5 files changed
+69 -31
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test/mp_eval_if_sf.cpp
+16 -3
View File
@@ -1,5 +1,5 @@
// Copyright 2017 Peter Dimov.
// Copyright 2017 Peter Dimov.
//
// Distributed under the Boost Software License, Version 1.0.
//
@@ -12,14 +12,15 @@
#include <type_traits>
using boost::mp11::mp_eval_if;
using boost::mp11::mp_eval_if_q;
using boost::mp11::mp_identity_t;
using boost::mp11::mp_valid;
using boost::mp11::mp_quote;
template<class C, class... A> using eval_if = mp_eval_if<C, void, mp_identity_t, A...>;
int main()
{
using boost::mp11::mp_valid;
BOOST_TEST_TRAIT_TRUE((mp_valid<eval_if, std::true_type>));
BOOST_TEST_TRAIT_TRUE((mp_valid<eval_if, std::true_type, void>));
BOOST_TEST_TRAIT_TRUE((mp_valid<eval_if, std::true_type, void, void>));
@@ -30,5 +31,17 @@ int main()
BOOST_TEST_TRAIT_FALSE((mp_valid<eval_if, std::false_type, void, void>));
BOOST_TEST_TRAIT_FALSE((mp_valid<eval_if, std::false_type, void, void, void>));
using Qi = mp_quote<mp_identity_t>;
BOOST_TEST_TRAIT_TRUE((mp_valid<mp_eval_if_q, std::true_type, void, Qi>));
BOOST_TEST_TRAIT_TRUE((mp_valid<mp_eval_if_q, std::true_type, void, Qi, void>));
BOOST_TEST_TRAIT_TRUE((mp_valid<mp_eval_if_q, std::true_type, void, Qi, void, void>));
BOOST_TEST_TRAIT_TRUE((mp_valid<mp_eval_if_q, std::true_type, void, Qi, void, void, void>));
BOOST_TEST_TRAIT_FALSE((mp_valid<mp_eval_if_q, std::false_type, void, Qi>));
BOOST_TEST_TRAIT_TRUE((mp_valid<mp_eval_if_q, std::false_type, void, Qi, void>));
BOOST_TEST_TRAIT_FALSE((mp_valid<mp_eval_if_q, std::false_type, void, Qi, void, void>));
BOOST_TEST_TRAIT_FALSE((mp_valid<mp_eval_if_q, std::false_type, void, Qi, void, void, void>));
return boost::report_errors();
}