1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
//
// zug: transducers for C++
// Copyright (C) 2019 Juan Pedro Bolivar Puente
//
// This software is distributed under the Boost Software License, Version 1.0.
// See accompanying file LICENSE or copy at http://boost.org/LICENSE_1_0.txt
//
#include <catch2/catch.hpp>
#include <zug/compose.hpp>
#include <zug/into_vector.hpp>
#include <zug/transducer/map.hpp>
#include <zug/transducer/take_while.hpp>
#include "../spies.hpp"
using namespace zug;
TEST_CASE("take_while, into")
{
using namespace std::placeholders;
// example1 {
auto v = std::vector<int>{1, 2, 3, 4, 5};
auto pred = std::bind(std::less<>{}, _1, 4);
auto res = into_vector(take_while(pred), v);
CHECK(res == decltype(res){1, 2, 3});
// }
}
namespace {
bool free_lt4(int x) { return x < 4; }
} // namespace
TEST_CASE("take_while, invoke")
{
auto v = std::vector<int>{1, 2, 3, 4, 3};
auto res = into_vector(take_while(free_lt4), v);
CHECK(res == (decltype(res){1, 2, 3}));
}
TEST_CASE("take_while, generate with map")
{
auto count = int{};
auto counter = [&] { return count++; };
auto lt10 = [](int x) { return x < 10; };
auto res =
transduce(comp(map(counter), take_while(lt10)), std::plus<int>{}, 1);
CHECK(res == 46);
}
|
