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-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // UNSUPPORTED: c++03, c++11, c++14, c++17
10
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
21 template <class R, class I>
isEqual(R & r,I i)22 bool isEqual(R& r, I i) {
23 for (auto e : r)
24 if (e != *i++)
25 return false;
26 return true;
27 }
28
main(int,char **)29 int 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 ranges
48 // join a range of prvalue containers
49 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