forked from OSchip/llvm-project
55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
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// Some basic examples of how zip_view might be used in the wild. This is a general
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// collection of sample algorithms and functions that try to mock general usage of
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// this view.
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#include <ranges>
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#include <array>
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#include <cassert>
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#include <vector>
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#include <string>
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int main(int, char**) {
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{
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std::ranges::zip_view v{
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std::array{1, 2},
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std::vector{4, 5, 6},
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std::array{7},
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};
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assert(std::ranges::size(v) == 1);
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assert(*v.begin() == std::make_tuple(1, 4, 7));
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}
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{
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using namespace std::string_literals;
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std::vector v{1, 2, 3, 4};
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std::array a{"abc"s, "def"s, "gh"s};
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auto view = std::views::zip(v, a);
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auto it = view.begin();
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assert(&(std::get<0>(*it)) == &(v[0]));
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assert(&(std::get<1>(*it)) == &(a[0]));
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++it;
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assert(&(std::get<0>(*it)) == &(v[1]));
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assert(&(std::get<1>(*it)) == &(a[1]));
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++it;
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assert(&(std::get<0>(*it)) == &(v[2]));
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assert(&(std::get<1>(*it)) == &(a[2]));
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++it;
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assert(it == view.end());
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}
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return 0;
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}
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