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//
// 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/drop_while.hpp>
#include <zug/transducer/take.hpp>
using namespace zug;
TEST_CASE("drop_while, into")
{
using namespace std::placeholders;
auto v = std::vector<int>{1, 2, 3, 4, 3};
{
auto lt0 = std::bind(std::less<>{}, _1, 0);
auto res = into_vector(drop_while(lt0), v);
CHECK(res == (decltype(res){1, 2, 3, 4, 3}));
}
{
auto lt4 = std::bind(std::less<>{}, _1, 4);
auto res = into_vector(drop_while(lt4), v);
CHECK(res == (decltype(res){4, 3}));
}
{
auto lt5 = std::bind(std::less<>{}, _1, 5);
auto res = into_vector(drop_while(lt5), v);
CHECK(res == (decltype(res){}));
}
}
TEST_CASE("drop_while, example")
{
// example1 {
auto v = std::vector<int>{1, 2, 3, 4, 3, 2, 1};
auto res = into_vector(drop_while([](int x) { return x < 4; }), v);
CHECK(res == (decltype(res){4, 3, 2, 1}));
// }
}
namespace {
bool free_lt4(int x) { return x < 4; }
} // namespace
TEST_CASE("drop_while, invoke")
{
auto v = std::vector<int>{1, 2, 3, 4, 3};
auto res = into_vector(drop_while(&free_lt4), v);
CHECK(res == (decltype(res){4, 3}));
}
TEST_CASE("drop_while, compose")
{
using namespace std::placeholders;
auto v = std::vector<int>{1, 2, 3, 4, 5};
auto lt3 = std::bind(std::less<>{}, _1, 3);
auto res = into_vector(comp(drop_while(lt3), take(2)), v);
CHECK(res == (decltype(res){3, 4}));
}
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