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Add make_from_tuple

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Peter Dimov
2017-06-08 17:42:50 +03:00
parent 359ae25630
commit 08777edbc1
7 changed files with 353 additions and 0 deletions
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test/make_from_tuple.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/tuple.hpp>
#include <boost/core/lightweight_test.hpp>
#include <boost/config.hpp>
#include <boost/detail/workaround.hpp>
#include <tuple>
#include <memory>
#include <utility>
#include <array>
struct T1
{
int x, y, z;
T1( int x = 0, int y = 0, int z = 0 ): x(x), y(y), z(z) {}
};
struct T2
{
std::unique_ptr<int> x, y, z;
T2( std::unique_ptr<int> x, std::unique_ptr<int> y, std::unique_ptr<int> z ): x(std::move(x)), y(std::move(y)), z(std::move(z)) {}
#if BOOST_WORKAROUND( BOOST_MSVC, <= 1800 )
T2( T2&& r ): x( std::move(r.x) ), y( std::move(r.y) ), z( std::move(r.z) ) {}
#endif
};
int main()
{
using boost::mp11::make_from_tuple;
{
std::tuple<int, short, char> tp{ 1, 2, 3 };
{
T1 t1 = make_from_tuple<T1>( tp );
BOOST_TEST_EQ( t1.x, 1 );
BOOST_TEST_EQ( t1.y, 2 );
BOOST_TEST_EQ( t1.z, 3 );
}
{
T1 t1 = make_from_tuple<T1>( std::move(tp) );
BOOST_TEST_EQ( t1.x, 1 );
BOOST_TEST_EQ( t1.y, 2 );
BOOST_TEST_EQ( t1.z, 3 );
}
}
{
std::tuple<int, short, char> const tp{ 1, 2, 3 };
{
T1 t1 = make_from_tuple<T1>( tp );
BOOST_TEST_EQ( t1.x, 1 );
BOOST_TEST_EQ( t1.y, 2 );
BOOST_TEST_EQ( t1.z, 3 );
}
{
T1 t1 = make_from_tuple<T1>( std::move(tp) );
BOOST_TEST_EQ( t1.x, 1 );
BOOST_TEST_EQ( t1.y, 2 );
BOOST_TEST_EQ( t1.z, 3 );
}
}
#if defined( __clang_major__ ) && __clang_major__ == 3 && __clang_minor__ < 8
#else
{
std::tuple<std::unique_ptr<int>, std::unique_ptr<int>, std::unique_ptr<int>> tp{ std::unique_ptr<int>(new int(1)), std::unique_ptr<int>(new int(2)), std::unique_ptr<int>(new int(3)) };
T2 t2 = make_from_tuple<T2>( std::move(tp) );
BOOST_TEST_EQ( *t2.x, 1 );
BOOST_TEST_EQ( *t2.y, 2 );
BOOST_TEST_EQ( *t2.z, 3 );
}
#endif
{
std::pair<int, short> tp{ 1, 2 };
{
T1 t1 = make_from_tuple<T1>( tp );
BOOST_TEST_EQ( t1.x, 1 );
BOOST_TEST_EQ( t1.y, 2 );
BOOST_TEST_EQ( t1.z, 0 );
}
{
T1 t1 = make_from_tuple<T1>( std::move(tp) );
BOOST_TEST_EQ( t1.x, 1 );
BOOST_TEST_EQ( t1.y, 2 );
BOOST_TEST_EQ( t1.z, 0 );
}
}
{
std::pair<int, short> const tp{ 1, 2 };
{
T1 t1 = make_from_tuple<T1>( tp );
BOOST_TEST_EQ( t1.x, 1 );
BOOST_TEST_EQ( t1.y, 2 );
BOOST_TEST_EQ( t1.z, 0 );
}
{
T1 t1 = make_from_tuple<T1>( std::move(tp) );
BOOST_TEST_EQ( t1.x, 1 );
BOOST_TEST_EQ( t1.y, 2 );
BOOST_TEST_EQ( t1.z, 0 );
}
}
{
std::array<int, 3> tp{{ 1, 2, 3 }};
{
T1 t1 = make_from_tuple<T1>( tp );
BOOST_TEST_EQ( t1.x, 1 );
BOOST_TEST_EQ( t1.y, 2 );
BOOST_TEST_EQ( t1.z, 3 );
}
{
T1 t1 = make_from_tuple<T1>( std::move(tp) );
BOOST_TEST_EQ( t1.x, 1 );
BOOST_TEST_EQ( t1.y, 2 );
BOOST_TEST_EQ( t1.z, 3 );
}
}
{
std::array<int, 3> const tp{{ 1, 2, 3 }};
{
T1 t1 = make_from_tuple<T1>( tp );
BOOST_TEST_EQ( t1.x, 1 );
BOOST_TEST_EQ( t1.y, 2 );
BOOST_TEST_EQ( t1.z, 3 );
}
{
T1 t1 = make_from_tuple<T1>( std::move(tp) );
BOOST_TEST_EQ( t1.x, 1 );
BOOST_TEST_EQ( t1.y, 2 );
BOOST_TEST_EQ( t1.z, 3 );
}
}
{
std::tuple<> tp;
{
T1 t1 = make_from_tuple<T1>( tp );
BOOST_TEST_EQ( t1.x, 0 );
BOOST_TEST_EQ( t1.y, 0 );
BOOST_TEST_EQ( t1.z, 0 );
}
{
T1 t1 = make_from_tuple<T1>( std::move(tp) );
BOOST_TEST_EQ( t1.x, 0 );
BOOST_TEST_EQ( t1.y, 0 );
BOOST_TEST_EQ( t1.z, 0 );
}
}
{
std::array<int, 0> tp;
{
T1 t1 = make_from_tuple<T1>( tp );
BOOST_TEST_EQ( t1.x, 0 );
BOOST_TEST_EQ( t1.y, 0 );
BOOST_TEST_EQ( t1.z, 0 );
}
{
T1 t1 = make_from_tuple<T1>( std::move(tp) );
BOOST_TEST_EQ( t1.x, 0 );
BOOST_TEST_EQ( t1.y, 0 );
BOOST_TEST_EQ( t1.z, 0 );
}
}
return boost::report_errors();
}