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Add tuple_apply

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Peter Dimov
2017-06-08 17:19:28 +03:00
parent 97720ed72d
commit 359ae25630
8 changed files with 323 additions and 1 deletions
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test/tuple_apply.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 <tuple>
#include <memory>
#include <utility>
#include <array>
int main()
{
using boost::mp11::tuple_apply;
{
std::tuple<int, short, char> tp{ 1, 2, 3 };
{
int s = tuple_apply( [&]( int x, int y, int z ){ return 100 * x + 10 * y + z; }, tp );
BOOST_TEST_EQ( s, 123 );
}
{
int s = tuple_apply( [&]( int x, int y, int z ){ return 100 * x + 10 * y + z; }, std::move(tp) );
BOOST_TEST_EQ( s, 123 );
}
}
{
std::tuple<int, short, char> const tp{ 1, 2, 3 };
{
int s = tuple_apply( [&]( int x, int y, int z ){ return 100 * x + 10 * y + z; }, tp );
BOOST_TEST_EQ( s, 123 );
}
{
int s = tuple_apply( [&]( int x, int y, int z ){ return 100 * x + 10 * y + z; }, std::move(tp) );
BOOST_TEST_EQ( s, 123 );
}
}
#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)) };
int s = tuple_apply( [&]( std::unique_ptr<int> px, std::unique_ptr<int> py, std::unique_ptr<int> pz ){ return 100 * *px + 10 * *py + *pz; }, std::move(tp) );
BOOST_TEST_EQ( s, 123 );
}
#endif
{
std::pair<int, short> tp{ 1, 2 };
{
int s = tuple_apply( [&]( int x, int y ){ return 10 * x + y; }, tp );
BOOST_TEST_EQ( s, 12 );
}
{
int s = tuple_apply( [&]( int x, int y ){ return 10 * x + y; }, std::move(tp) );
BOOST_TEST_EQ( s, 12 );
}
}
{
std::pair<int, short> const tp{ 1, 2 };
{
int s = tuple_apply( [&]( int x, int y ){ return 10 * x + y; }, tp );
BOOST_TEST_EQ( s, 12 );
}
{
int s = tuple_apply( [&]( int x, int y ){ return 10 * x + y; }, std::move(tp) );
BOOST_TEST_EQ( s, 12 );
}
}
{
std::array<int, 3> tp{{ 1, 2, 3 }};
{
int s = tuple_apply( [&]( int x, int y, int z ){ return 100 * x + 10 * y + z; }, tp );
BOOST_TEST_EQ( s, 123 );
}
{
int s = tuple_apply( [&]( int x, int y, int z ){ return 100 * x + 10 * y + z; }, std::move(tp) );
BOOST_TEST_EQ( s, 123 );
}
}
{
std::array<int, 3> const tp{{ 1, 2, 3 }};
{
int s = tuple_apply( [&]( int x, int y, int z ){ return 100 * x + 10 * y + z; }, tp );
BOOST_TEST_EQ( s, 123 );
}
{
int s = tuple_apply( [&]( int x, int y, int z ){ return 100 * x + 10 * y + z; }, std::move(tp) );
BOOST_TEST_EQ( s, 123 );
}
}
{
std::tuple<> tp;
BOOST_TEST_EQ( tuple_apply( []{ return 11; }, tp ), 11 );
BOOST_TEST_EQ( tuple_apply( []{ return 12; }, std::move( tp ) ), 12 );
}
{
std::array<int, 0> tp;
BOOST_TEST_EQ( tuple_apply( []{ return 11; }, tp ), 11 );
BOOST_TEST_EQ( tuple_apply( []{ return 12; }, std::move( tp ) ), 12 );
}
return boost::report_errors();
}