afb81b8278
Some checks failed
Docker. / Ubuntu (push) Has been cancelled
User-agent updater. / User-agent (push) Failing after 15s
Lock Threads / lock (push) Failing after 10s
Waiting for answer. / waiting-for-answer (push) Failing after 22s
Needs user action. / needs-user-action (push) Failing after 8s
Can't reproduce. / cant-reproduce (push) Failing after 8s
Close stale issues and PRs / stale (push) Has been cancelled
91 lines
2.6 KiB
C++
91 lines
2.6 KiB
C++
// Range v3 library
|
|
//
|
|
// Copyright Eric Niebler 2014-present
|
|
//
|
|
// 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 <vector>
|
|
#include <range/v3/core.hpp>
|
|
#include <range/v3/view/iota.hpp>
|
|
#include <range/v3/view/generate.hpp>
|
|
#include <range/v3/view/take_while.hpp>
|
|
#include <range/v3/utility/copy.hpp>
|
|
#include "../simple_test.hpp"
|
|
#include "../test_utils.hpp"
|
|
|
|
struct my_data
|
|
{
|
|
int i;
|
|
};
|
|
|
|
bool operator==(my_data left, my_data right)
|
|
{
|
|
return left.i == right.i;
|
|
}
|
|
|
|
int main()
|
|
{
|
|
using namespace ranges;
|
|
auto rng0 = views::iota(10) | views::take_while([](int i) { return i != 25; });
|
|
::check_equal(rng0, {10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24});
|
|
CPP_assert(view_<decltype(rng0)>);
|
|
CPP_assert(!common_range<decltype(rng0)>);
|
|
CPP_assert(random_access_iterator<decltype(rng0.begin())>);
|
|
|
|
std::vector<int> vi{0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
|
|
auto rng1 = vi | views::take_while([](int i) { return i != 50; });
|
|
CPP_assert(view_<decltype(rng1)>);
|
|
CPP_assert(random_access_range<decltype(rng1)>);
|
|
::check_equal(rng1, {0, 1, 2, 3, 4, 5, 6, 7, 8, 9});
|
|
|
|
// Check with a mutable predicate
|
|
int rgi[] = {0,1,2,3,4,5,6,7,8,9};
|
|
int cnt = 0;
|
|
auto mutable_only = views::take_while(rgi, [cnt](int) mutable { return ++cnt <= 5;});
|
|
::check_equal(mutable_only, {0,1,2,3,4});
|
|
CPP_assert(view_<decltype(mutable_only)>);
|
|
CPP_assert(!view_<decltype(mutable_only) const>);
|
|
|
|
{
|
|
auto ns = views::generate([]() mutable {
|
|
static int N;
|
|
return ++N;
|
|
});
|
|
auto rng = ns | views::take_while([](int i) { return i < 5; });
|
|
::check_equal(rng, {1,2,3,4});
|
|
}
|
|
|
|
{
|
|
auto ns = views::generate([]() mutable {
|
|
static int N;
|
|
return ++N;
|
|
});
|
|
auto rng = ns | views::take_while([](int i) mutable { return i < 5; });
|
|
::check_equal(rng, {1,2,3,4});
|
|
}
|
|
|
|
{
|
|
auto rng = debug_input_view<int const>{rgi} | views::take_while([](int i) {
|
|
return i != 5;
|
|
});
|
|
::check_equal(rng, {0,1,2,3,4});
|
|
}
|
|
|
|
{
|
|
auto ns = views::generate([]() {
|
|
static int N;
|
|
return my_data{++N};
|
|
});
|
|
auto rng = ns | views::take_while([](int i) { return i < 5; },
|
|
&my_data::i);
|
|
::check_equal(rng, std::vector<my_data>{{1},{2},{3},{4}});
|
|
}
|
|
|
|
return test_result();
|
|
}
|