forked from boostorg/mp11
Squash-merge PR #50
This commit is contained in:
Peter Dimov
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test/tuple_transform.cpp
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190
test/tuple_transform.cpp
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// Copyright 2020 Hans Dembinski.
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//
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// Distributed under the Boost Software License, Version 1.0.
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//
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// 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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#include <boost/mp11/tuple.hpp>
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#include <boost/core/lightweight_test.hpp>
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#include <boost/core/lightweight_test_trait.hpp>
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#include <tuple>
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#include <utility>
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#include <iosfwd>
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// family of test types with state
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template <int N>
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struct T {
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int value;
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T() : value{N} {};
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explicit T(int n) : value{n} {}
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};
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template <int N>
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std::ostream& operator<<( std::ostream& os, T<N> const& t )
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{
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os << t.value;
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return os;
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}
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// test function changes type and value
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struct F {
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template<int N, int M=1> T<N+M> operator()( T<N> a, T<M> b={} ) const
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{
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return T<N+M>{a.value + b.value + 1};
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}
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};
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int main()
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{
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using boost::mp11::tuple_transform;
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{
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std::tuple<T<1>, T<2>, T<3>> tp;
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std::tuple<T<4>, T<5>, T<6>> tp2;
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{
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std::tuple<T<2>, T<3>, T<4>> s = tuple_transform( F{}, tp );
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BOOST_TEST_EQ( std::get<0>(s).value, 3 );
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BOOST_TEST_EQ( std::get<1>(s).value, 4 );
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BOOST_TEST_EQ( std::get<2>(s).value, 5 );
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}
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{
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std::tuple<T<2>, T<3>, T<4>> s = tuple_transform( F{}, std::move(tp) );
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BOOST_TEST_EQ( std::get<0>(s).value, 3 );
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BOOST_TEST_EQ( std::get<1>(s).value, 4 );
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BOOST_TEST_EQ( std::get<2>(s).value, 5 );
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}
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{
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std::tuple<T<5>, T<7>, T<9>> s = tuple_transform( F{}, tp, tp2 );
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BOOST_TEST_EQ( std::get<0>(s).value, 6 );
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BOOST_TEST_EQ( std::get<1>(s).value, 8 );
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BOOST_TEST_EQ( std::get<2>(s).value, 10 );
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}
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{
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std::tuple<T<5>, T<7>, T<9>> s = tuple_transform(
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F{}, std::move(tp), std::move(tp2)
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);
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BOOST_TEST_EQ( std::get<0>(s).value, 6 );
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BOOST_TEST_EQ( std::get<1>(s).value, 8 );
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BOOST_TEST_EQ( std::get<2>(s).value, 10 );
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}
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}
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{
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std::tuple<T<1>, T<2>, T<3>> const tp;
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std::tuple<T<4>, T<5>, T<6>> const tp2;
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{
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std::tuple<T<2>, T<3>, T<4>> s = tuple_transform( F{}, tp );
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BOOST_TEST_EQ( std::get<0>(s).value, 3 );
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BOOST_TEST_EQ( std::get<1>(s).value, 4 );
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BOOST_TEST_EQ( std::get<2>(s).value, 5 );
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}
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{
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std::tuple<T<2>, T<3>, T<4>> s = tuple_transform( F{}, std::move(tp) );
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BOOST_TEST_EQ( std::get<0>(s).value, 3 );
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BOOST_TEST_EQ( std::get<1>(s).value, 4 );
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BOOST_TEST_EQ( std::get<2>(s).value, 5 );
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}
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{
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std::tuple<T<5>, T<7>, T<9>> s = tuple_transform( F{}, tp, tp2 );
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BOOST_TEST_EQ( std::get<0>(s).value, 6 );
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BOOST_TEST_EQ( std::get<1>(s).value, 8 );
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BOOST_TEST_EQ( std::get<2>(s).value, 10 );
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}
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{
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std::tuple<T<5>, T<7>, T<9>> s = tuple_transform(
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F{}, std::move(tp), std::move(tp2)
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);
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BOOST_TEST_EQ( std::get<0>(s).value, 6 );
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BOOST_TEST_EQ( std::get<1>(s).value, 8 );
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BOOST_TEST_EQ( std::get<2>(s).value, 10 );
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}
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}
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{
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std::pair<T<1>, T<2>> tp;
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std::pair<T<3>, T<4>> tp2;
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{
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std::pair<T<2>, T<3>> s = tuple_transform( F{}, tp );
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BOOST_TEST_EQ( std::get<0>(s).value, 3 );
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BOOST_TEST_EQ( std::get<1>(s).value, 4 );
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}
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{
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std::pair<T<2>, T<3>> s = tuple_transform( F{}, std::move(tp) );
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BOOST_TEST_EQ( std::get<0>(s).value, 3 );
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BOOST_TEST_EQ( std::get<1>(s).value, 4 );
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}
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{
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std::pair<T<4>, T<6>> s = tuple_transform( F{}, tp, tp2 );
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BOOST_TEST_EQ( std::get<0>(s).value, 5 );
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BOOST_TEST_EQ( std::get<1>(s).value, 7 );
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}
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{
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std::pair<T<4>, T<6>> s = tuple_transform(
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F{}, std::move(tp), std::move(tp2)
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);
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BOOST_TEST_EQ( std::get<0>(s).value, 5 );
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BOOST_TEST_EQ( std::get<1>(s).value, 7 );
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}
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}
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{
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std::pair<T<1>, T<2>> const tp;
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std::pair<T<3>, T<4>> const tp2;
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{
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std::pair<T<2>, T<3>> s = tuple_transform( F{}, tp );
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BOOST_TEST_EQ( std::get<0>(s).value, 3 );
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BOOST_TEST_EQ( std::get<1>(s).value, 4 );
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}
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{
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std::pair<T<2>, T<3>> s = tuple_transform( F{}, std::move(tp) );
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BOOST_TEST_EQ( std::get<0>(s).value, 3 );
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BOOST_TEST_EQ( std::get<1>(s).value, 4 );
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}
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{
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std::pair<T<4>, T<6>> s = tuple_transform( F{}, tp, tp2 );
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BOOST_TEST_EQ( std::get<0>(s).value, 5 );
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BOOST_TEST_EQ( std::get<1>(s).value, 7 );
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}
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{
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std::pair<T<4>, T<6>> s = tuple_transform(
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F{}, std::move(tp), std::move(tp2)
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);
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BOOST_TEST_EQ( std::get<0>(s).value, 5 );
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BOOST_TEST_EQ( std::get<1>(s).value, 7 );
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}
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}
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{
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std::tuple<> tp;
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{
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auto s = tuple_transform( F{}, tp );
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BOOST_TEST_TRAIT_TRUE((std::is_same<decltype(s), std::tuple<>>));
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}
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{
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auto s = tuple_transform( F{}, std::move(tp) );
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BOOST_TEST_TRAIT_TRUE((std::is_same<decltype(s), std::tuple<>>));
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}
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}
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return boost::report_errors();
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}
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