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69 lines
2.1 KiB
C++
69 lines
2.1 KiB
C++
/*
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@copyright Louis Dionne 2014
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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*/
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#include <boost/hana/integral.hpp>
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#include <boost/hana/detail/static_assert.hpp>
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#include <boost/hana/type.hpp>
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using namespace boost::hana;
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struct T; struct E;
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constexpr struct { } invalid{};
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auto test_eval_if = [](auto true_, auto false_) {
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BOOST_HANA_STATIC_ASSERT(eval_if(true_,
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[](auto) { return type<T>; },
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[](auto id) { id(invalid)("would fail"); return type<E>; }
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) == type<T>);
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BOOST_HANA_STATIC_ASSERT(eval_if(false_,
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[](auto id) { id(invalid)("would fail"); return type<T>; },
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[](auto) { return type<E>; }
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) == type<E>);
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};
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auto test_if = [](auto true_, auto false_) {
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BOOST_HANA_STATIC_ASSERT(if_(true_, type<T>, type<E>) == type<T>);
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BOOST_HANA_STATIC_ASSERT(if_(false_, type<T>, type<E>) == type<E>);
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};
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auto test_and = [](auto true_, auto false_) {
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BOOST_HANA_STATIC_ASSERT(!or_(false_));
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BOOST_HANA_STATIC_ASSERT(or_(true_));
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BOOST_HANA_STATIC_ASSERT(!or_(false_, false_));
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BOOST_HANA_STATIC_ASSERT(or_(false_, true_));
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BOOST_HANA_STATIC_ASSERT(or_(false_, false_, true_));
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// BOOST_HANA_STATIC_ASSERT(or_(true_, invalid, invalid));
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};
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auto test_or = [](auto true_, auto false_) {
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BOOST_HANA_STATIC_ASSERT(and_(true_));
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BOOST_HANA_STATIC_ASSERT(!and_(false_));
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BOOST_HANA_STATIC_ASSERT(and_(true_, true_));
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BOOST_HANA_STATIC_ASSERT(!and_(true_, false_));
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BOOST_HANA_STATIC_ASSERT(!and_(true_, true_, false_));
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// BOOST_HANA_STATIC_ASSERT(!and_(false_, invalid, invalid));
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};
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auto test_not = [](auto true_, auto false_) {
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BOOST_HANA_STATIC_ASSERT(not_(false_));
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BOOST_HANA_STATIC_ASSERT(not_(not_(true_)));
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};
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auto test = [](auto true_, auto false_) {
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test_eval_if(true_, false_);
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test_if(true_, false_);
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test_and(true_, false_);
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test_or(true_, false_);
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test_not(true_, false_);
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};
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int main() {
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test(true_, false_);
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test(int_<2>, int_<0>); // make sure int_<2> can be treated as true_
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}
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