3d3103b733
- added views::join adaptor object - added test for the adaptor object - fixed some join_view's tests. e.g iter_swap test - added some negative tests for join_view to test that operations do not exist when constraints aren't met - added tests that locks down issues that were already addressed in previous change - LWG3500 `join_view::iterator::operator->()` is bogus - LWG3313 `join_view::iterator::operator--` is incorrectly constrained - LWG3517 `join_view::iterator`'s `iter_swap` is underconstrained - P2328R1 join_view should join all views of ranges - fixed some issues in join_view and added tests - LWG3535 `join_view::iterator::iterator_category` and `::iterator_concept` lie - LWG3474 Nesting ``join_views`` is broken because of CTAD - added tests for an LWG issue that isn't resolved in the standard yet, but the previous code has workaround. - LWG3569 Inner iterator not default_initializable Reviewed By: #libc, var-const Spies: var-const, libcxx-commits Differential Revision: https://reviews.llvm.org/D123466
66 lines
1.8 KiB
C++
66 lines
1.8 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
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// UNSUPPORTED: libcpp-has-no-incomplete-ranges
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// General tests for join_view. This file does not test anything specifically.
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#include <algorithm>
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#include <cassert>
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#include <ranges>
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#include <string>
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#include <vector>
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#include "types.h"
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template <class R, class I>
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bool isEqual(R& r, I i) {
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for (auto e : r)
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if (e != *i++)
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return false;
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return true;
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}
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int main(int, char**) {
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{
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int buffer[4][4] = {{1111, 2222, 3333, 4444}, {555, 666, 777, 888}, {99, 1010, 1111, 1212}, {13, 14, 15, 16}};
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int* flattened = reinterpret_cast<int*>(buffer);
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ChildView children[4] = {ChildView(buffer[0]), ChildView(buffer[1]), ChildView(buffer[2]), ChildView(buffer[3])};
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auto jv = std::ranges::join_view(ParentView(children));
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assert(isEqual(jv, flattened));
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}
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{
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std::vector<std::string> vec = {"Hello", ",", " ", "World", "!"};
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std::string check = "Hello, World!";
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std::ranges::join_view jv(vec);
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assert(isEqual(jv, check.begin()));
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}
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{
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// P2328R1 join_view should join all views of ranges
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// join a range of prvalue containers
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std::vector x{1, 2, 3, 4};
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auto y = x | std::views::transform([](auto i) {
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std::vector<int> v(i);
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for (int& ii : v) {
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ii = i;
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}
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return v;
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});
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std::ranges::join_view jv(y);
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std::vector<int> check{1, 2, 2, 3, 3, 3, 4, 4, 4, 4};
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assert(isEqual(jv, check.begin()));
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}
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return 0;
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}
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