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// Range v3 library
//
// Copyright Filip Matzner 2017
//
// Use, modification and distribution is subject to 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)
//
// Project home: https://github.com/ericniebler/range-v3
#include <list>
#include <memory>
#include <tuple>
#include <vector>
#include <range/v3/core.hpp>
#include <range/v3/algorithm/for_each.hpp>
#include <range/v3/view/cycle.hpp>
#include <range/v3/view/for_each.hpp>
#include <range/v3/view/iota.hpp>
#include <range/v3/view/join.hpp>
#include <range/v3/view/remove_if.hpp>
#include <range/v3/view/repeat.hpp>
#include <range/v3/view/reverse.hpp>
#include <range/v3/experimental/view/shared.hpp>
#include <range/v3/view/take.hpp>
#include "../../simple_test.hpp"
#include "../../test_utils.hpp"
using namespace ranges;
template<typename T>
void check_shared_contents()
{
// build two instances sharing the same range
experimental::shared_view<T> view1 = experimental::views::shared(T{1, 1, 1, 2, 3, 4, 4});
experimental::shared_view<T> view2 = view1;
// check the length of the views
CHECK(view1.size() == 7u);
CHECK(view2.size() == 7u);
// check the stored numbers
auto check_values = [](experimental::shared_view<T> & rng) {
::check_equal(views::cycle(rng) | views::take(10), {1, 1, 1, 2, 3, 4, 4, 1, 1, 1});
::check_equal(views::all(rng) | views::take(5), {1, 1, 1, 2, 3});
::check_equal(rng | views::take(5), {1, 1, 1, 2, 3});
::check_equal(rng, {1, 1, 1, 2, 3, 4, 4});
};
check_values(view1);
check_values(view2);
// check that changes are shared
*(++begin(view1)) = 7;
CHECK(*(++begin(view2)) == 7);
*begin(view2) = 3;
CHECK(*begin(view1) == 3);
}
int main()
{
// check shared random access range
check_shared_contents<std::vector<int>>();
// check shared bidirectional range
check_shared_contents<std::list<int>>();
{
// check the piped construction from an rvalue
std::vector<int> base_vec = {1, 2, 2, 8, 2, 7};
auto vec_view = std::move(base_vec) | experimental::views::shared;
CHECK(vec_view.size() == 6u);
::check_equal(vec_view, {1, 2, 2, 8, 2, 7});
}
{
// test bidirectional range
auto list_view = std::list<int>{1, 2, 3} | experimental::views::shared;
CHECK(list_view.size() == 3u);
has_type<int &>(*begin(list_view));
CPP_assert(sized_range<decltype(list_view)>);
CPP_assert(common_range<decltype(list_view)>);
CPP_assert(bidirectional_range<decltype(list_view)>);
CPP_assert(!random_access_range<decltype(list_view)>);
// test bidirectional range iterator
CHECK(*begin(list_view) == 1);
CHECK(*prev(end(list_view)) == 3);
}
{
// test random access range
auto vec_view = std::vector<int>{1, 2, 3} | experimental::views::shared;
CHECK(vec_view.size() == 3u);
has_type<int &>(*begin(vec_view));
CPP_assert(sized_range<decltype(vec_view)>);
CPP_assert(common_range<decltype(vec_view)>);
CPP_assert(random_access_range<decltype(vec_view)>);
CHECK(vec_view[0] == 1);
CHECK(vec_view[1] == 2);
CHECK(vec_view[2] == 3);
}
{
// check temporary value in views::transform
auto f = [](unsigned a){ return std::vector<unsigned>(a, a); };
auto vec_view =
views::iota(1u)
| views::transform(f)
| views::transform(experimental::views::shared)
| views::join
| views::take(10);
::check_equal(vec_view, {1u, 2u, 2u, 3u, 3u, 3u, 4u, 4u, 4u, 4u});
}
{
// check temporary value in views::for_each
std::vector<int> base_vec{1, 2, 3};
auto vec_view =
views::repeat(base_vec)
| views::for_each([](std::vector<int> tmp) {
return yield_from(std::move(tmp) | experimental::views::shared | views::reverse);
})
| views::take(7);
::check_equal(vec_view, {3, 2, 1, 3, 2, 1, 3});
}
{
// check temporary value in views::for_each without the yield_from
std::vector<int> base_vec{1, 2, 3};
auto vec_view =
views::repeat(base_vec)
| views::for_each([](std::vector<int> tmp) {
return std::move(tmp) | experimental::views::shared | views::reverse;
})
| views::take(7);
::check_equal(vec_view, {3, 2, 1, 3, 2, 1, 3});
}
return test_result();
}
|
