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91 lines
2.4 KiB
C++
91 lines
2.4 KiB
C++
// Range v3 library
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//
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// Copyright Eric Niebler 2014-present
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//
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// Use, modification and distribution is subject to the
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// Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#include <set>
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#include <vector>
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#include <range/v3/core.hpp>
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#include <range/v3/view/iota.hpp>
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#include <range/v3/view/take.hpp>
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#include <range/v3/view/for_each.hpp>
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#include <range/v3/view/ref.hpp>
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#include <range/v3/action/insert.hpp>
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#include "../simple_test.hpp"
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#include "../test_utils.hpp"
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template<typename T>
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struct vector_like : std::vector<T> {
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using std::vector<T>::vector;
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using typename std::vector<T>::size_type;
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size_type last_reservation{};
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size_type reservation_count{};
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void reserve(size_type n) {
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std::vector<T>::reserve(n);
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last_reservation = n;
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++reservation_count;
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}
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};
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int main()
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{
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using namespace ranges;
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{
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std::vector<int> v;
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auto i = insert(v, v.begin(), 42);
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CHECK(i == v.begin());
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::check_equal(v, {42});
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insert(v, v.end(), {1,2,3});
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::check_equal(v, {42,1,2,3});
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insert(v, v.begin(), views::ints | views::take(3));
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::check_equal(v, {0,1,2,42,1,2,3});
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int rg[] = {9,8,7};
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insert(v, v.begin()+3, rg);
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::check_equal(v, {0,1,2,9,8,7,42,1,2,3});
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insert(v, v.begin()+1, rg);
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::check_equal(v, {0,9,8,7,1,2,9,8,7,42,1,2,3});
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}
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{
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std::set<int> s;
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insert(s,
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views::ints|views::take(10)|views::for_each([](int i){return yield_if(i%2==0,i);}));
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::check_equal(s, {0,2,4,6,8});
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auto j = insert(s, 10);
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CHECK(j.first == prev(s.end()));
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CHECK(j.second == true);
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::check_equal(s, {0,2,4,6,8,10});
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insert(views::ref(s), 12);
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::check_equal(s, {0,2,4,6,8,10,12});
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}
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{
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const std::size_t N = 1024;
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vector_like<int> vl;
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insert(vl, vl.end(), views::iota(0, int{N}));
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CHECK(vl.reservation_count == 1u);
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CHECK(vl.last_reservation == N);
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auto r = views::iota(0, int{2 * N});
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insert(vl, vl.begin() + 42, begin(r), end(r));
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CHECK(vl.reservation_count == 2u);
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CHECK(vl.last_reservation == 3 * N);
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int i = 42;
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insert(vl, vl.end(), &i, &i + 1);
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CHECK(vl.reservation_count == 3u);
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CHECK(vl.last_reservation > 3 * N + 1);
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}
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return ::test_result();
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}
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