65 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++03, c++11, c++14, c++1710 11// General tests for join_view. This file does not test anything specifically.12 13#include <algorithm>14#include <cassert>15#include <ranges>16#include <string>17#include <vector>18 19#include "types.h"20 21template <class R, class I>22bool isEqual(R& r, I i) {23 for (auto e : r)24 if (e != *i++)25 return false;26 return true;27}28 29int main(int, char**) {30 {31 int buffer[4][4] = {{1111, 2222, 3333, 4444}, {555, 666, 777, 888}, {99, 1010, 1111, 1212}, {13, 14, 15, 16}};32 int* flattened = reinterpret_cast<int*>(buffer);33 34 ChildView children[4] = {ChildView(buffer[0]), ChildView(buffer[1]), ChildView(buffer[2]), ChildView(buffer[3])};35 auto jv = std::ranges::join_view(ParentView(children));36 assert(isEqual(jv, flattened));37 }38 39 {40 std::vector<std::string> vec = {"Hello", ",", " ", "World", "!"};41 std::string check = "Hello, World!";42 std::ranges::join_view jv(vec);43 assert(isEqual(jv, check.begin()));44 }45 46 {47 // P2328R1 join_view should join all views of ranges48 // join a range of prvalue containers49 std::vector x{1, 2, 3, 4};50 auto y = x | std::views::transform([](auto i) {51 std::vector<int> v(i);52 for (int& ii : v) {53 ii = i;54 }55 return v;56 });57 58 std::ranges::join_view jv(y);59 std::vector<int> check{1, 2, 2, 3, 3, 3, 4, 4, 4, 4};60 assert(isEqual(jv, check.begin()));61 }62 63 return 0;64}65