299 lines
11 KiB
C++
299 lines
11 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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// constexpr auto end();
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// constexpr auto end() const;
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#include <cassert>
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#include <ranges>
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#include <type_traits>
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#include "test_macros.h"
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#include "types.h"
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template <class T>
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concept HasConstEnd = requires (const T& t){
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t.end();
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};
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// | ID | outer | outer | outer | inner | inner | inner | end() | end() |
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// | | simple | forward | common | l_ref | forward | common | | const |
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// |----|--------|---------|--------|-------|---------|--------|---------------|--------------|
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// | 1 | Y | Y | Y | Y | Y | Y |iterator<true> |iterator<true>|
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// | 2 | Y | Y | Y | Y | Y | N |sentinel<true> |sentinel<true>|
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// | 3 | Y | Y | Y | Y | N | Y |sentinel<true> |sentinel<true>|
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// | 4 | Y | Y | Y | N | Y | Y |sentinel<true> | - |
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// | 5 | Y | Y | N | Y | Y | Y |sentinel<true> |sentinel<true>|
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// | 6 | Y | N | Y | Y | Y | Y |sentinel<true> |sentinel<true>|
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// | 7 | N | Y | Y | Y | Y | Y |iterator<false>|iterator<true>|
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// | 8 | N | Y | Y | Y | Y | N |sentinel<false>|sentinel<true>|
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// | 9 | N | Y | Y | Y | N | Y |sentinel<false>|sentinel<true>|
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// | 10 | N | Y | Y | N | Y | Y |sentinel<false>| - |
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// | 11 | N | Y | N | Y | Y | Y |sentinel<false>|sentinel<true>|
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// | 12 | N | N | Y | Y | Y | Y |sentinel<false>|sentinel<true>|
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//
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//
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struct ConstNotRange : std::ranges::view_base {
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const ChildView* begin();
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const ChildView* end();
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};
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constexpr bool test() {
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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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{
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// test ID 1
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ForwardCommonInner inners[4] = {buffer[0], buffer[1], buffer[2], buffer[3]};
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SimpleForwardCommonOuter<ForwardCommonInner> outer{inners};
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std::ranges::join_view jv(outer);
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assert(jv.end() == std::ranges::next(jv.begin(), 16));
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assert(std::as_const(jv).end() == std::ranges::next(std::as_const(jv).begin(), 16));
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static_assert(HasConstEnd<decltype(jv)>);
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static_assert(std::same_as<decltype(jv.end()), decltype(std::as_const(jv).end())>);
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static_assert(std::ranges::common_range<decltype(jv)>);
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static_assert(std::ranges::common_range<const decltype(jv)>);
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}
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{
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// test ID 2
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ForwardNonCommonInner inners[3] = {buffer[0], buffer[1], buffer[2]};
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SimpleForwardCommonOuter<ForwardNonCommonInner> outer{inners};
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std::ranges::join_view jv(outer);
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assert(jv.end() == std::ranges::next(jv.begin(), 12));
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assert(std::as_const(jv).end() == std::ranges::next(std::as_const(jv).begin(), 12));
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static_assert(HasConstEnd<decltype(jv)>);
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static_assert(std::same_as<decltype(jv.end()), decltype(std::as_const(jv).end())>);
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static_assert(!std::ranges::common_range<decltype(jv)>);
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static_assert(!std::ranges::common_range<const decltype(jv)>);
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}
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{
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// test ID 3
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InputCommonInner inners[3] = {buffer[0], buffer[1], buffer[2]};
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SimpleForwardCommonOuter<InputCommonInner> outer{inners};
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std::ranges::join_view jv(outer);
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assert(jv.end() == std::ranges::next(jv.begin(), 12));
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assert(std::as_const(jv).end() == std::ranges::next(std::as_const(jv).begin(), 12));
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static_assert(HasConstEnd<decltype(jv)>);
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static_assert(std::same_as<decltype(jv.end()), decltype(std::as_const(jv).end())>);
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static_assert(!std::ranges::common_range<decltype(jv)>);
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static_assert(!std::ranges::common_range<const decltype(jv)>);
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}
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{
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// test ID 4
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ForwardCommonInner inners[2] = {buffer[0], buffer[1]};
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InnerRValue<SimpleForwardCommonOuter<ForwardCommonInner>> outer{inners};
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std::ranges::join_view jv(outer);
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assert(jv.end() == std::ranges::next(jv.begin(), 8));
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static_assert(!HasConstEnd<decltype(jv)>);
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static_assert(!std::ranges::common_range<decltype(jv)>);
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static_assert(!std::ranges::common_range<const decltype(jv)>);
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}
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{
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// test ID 5
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ForwardCommonInner inners[4] = {buffer[0], buffer[1], buffer[2], buffer[3]};
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SimpleForwardNonCommonOuter<ForwardCommonInner> outer{inners};
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std::ranges::join_view jv(outer);
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assert(jv.end() == std::ranges::next(jv.begin(), 16));
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assert(std::as_const(jv).end() == std::ranges::next(std::as_const(jv).begin(), 16));
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static_assert(HasConstEnd<decltype(jv)>);
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static_assert(std::same_as<decltype(jv.end()), decltype(std::as_const(jv).end())>);
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static_assert(!std::ranges::common_range<decltype(jv)>);
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static_assert(!std::ranges::common_range<const decltype(jv)>);
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}
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{
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// test ID 6
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ForwardCommonInner inners[4] = {buffer[0], buffer[1], buffer[2], buffer[3]};
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SimpleInputCommonOuter<ForwardCommonInner> outer{inners};
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std::ranges::join_view jv(outer);
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assert(jv.end() == std::ranges::next(jv.begin(), 16));
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assert(std::as_const(jv).end() == std::ranges::next(std::as_const(jv).begin(), 16));
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static_assert(HasConstEnd<decltype(jv)>);
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static_assert(std::same_as<decltype(jv.end()), decltype(std::as_const(jv).end())>);
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static_assert(!std::ranges::common_range<decltype(jv)>);
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static_assert(!std::ranges::common_range<const decltype(jv)>);
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}
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{
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// test ID 7
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ForwardCommonInner inners[1] = {buffer[0]};
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NonSimpleForwardCommonOuter<ForwardCommonInner> outer{inners};
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std::ranges::join_view jv(outer);
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assert(jv.end() == std::ranges::next(jv.begin(), 4));
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assert(std::as_const(jv).end() == std::ranges::next(std::as_const(jv).begin(), 4));
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static_assert(HasConstEnd<decltype(jv)>);
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static_assert(!std::same_as<decltype(jv.end()), decltype(std::as_const(jv).end())>);
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static_assert(std::ranges::common_range<decltype(jv)>);
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static_assert(std::ranges::common_range<const decltype(jv)>);
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}
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{
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// test ID 8
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ForwardNonCommonInner inners[3] = {buffer[0], buffer[1], buffer[2]};
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NonSimpleForwardCommonOuter<ForwardNonCommonInner> outer{inners};
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std::ranges::join_view jv(outer);
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assert(jv.end() == std::ranges::next(jv.begin(), 12));
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assert(std::as_const(jv).end() == std::ranges::next(std::as_const(jv).begin(), 12));
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static_assert(HasConstEnd<decltype(jv)>);
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static_assert(!std::same_as<decltype(jv.end()), decltype(std::as_const(jv).end())>);
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static_assert(!std::ranges::common_range<decltype(jv)>);
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static_assert(!std::ranges::common_range<const decltype(jv)>);
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}
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{
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// test ID 9
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InputCommonInner inners[3] = {buffer[0], buffer[1], buffer[2]};
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NonSimpleForwardCommonOuter<InputCommonInner> outer{inners};
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std::ranges::join_view jv(outer);
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assert(jv.end() == std::ranges::next(jv.begin(), 12));
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assert(std::as_const(jv).end() == std::ranges::next(std::as_const(jv).begin(), 12));
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static_assert(HasConstEnd<decltype(jv)>);
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static_assert(!std::same_as<decltype(jv.end()), decltype(std::as_const(jv).end())>);
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static_assert(!std::ranges::common_range<decltype(jv)>);
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static_assert(!std::ranges::common_range<const decltype(jv)>);
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}
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{
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// test ID 10
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ForwardCommonInner inners[2] = {buffer[0], buffer[1]};
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InnerRValue<NonSimpleForwardCommonOuter<ForwardCommonInner>> outer{inners};
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std::ranges::join_view jv(outer);
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assert(jv.end() == std::ranges::next(jv.begin(), 8));
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static_assert(!HasConstEnd<decltype(jv)>);
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static_assert(!std::ranges::common_range<decltype(jv)>);
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static_assert(!std::ranges::common_range<const decltype(jv)>);
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}
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{
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// test ID 11
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ForwardCommonInner inners[4] = {buffer[0], buffer[1], buffer[2], buffer[3]};
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NonSimpleForwardNonCommonOuter<ForwardCommonInner> outer{inners};
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std::ranges::join_view jv(outer);
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assert(jv.end() == std::ranges::next(jv.begin(), 16));
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assert(std::as_const(jv).end() == std::ranges::next(std::as_const(jv).begin(), 16));
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static_assert(HasConstEnd<decltype(jv)>);
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static_assert(!std::same_as<decltype(jv.end()), decltype(std::as_const(jv).end())>);
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static_assert(!std::ranges::common_range<decltype(jv)>);
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static_assert(!std::ranges::common_range<const decltype(jv)>);
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}
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{
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// test ID 12
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ForwardCommonInner inners[4] = {buffer[0], buffer[1], buffer[2], buffer[3]};
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NonSimpleInputCommonOuter<ForwardCommonInner> outer{inners};
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std::ranges::join_view jv(outer);
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assert(jv.end() == std::ranges::next(jv.begin(), 16));
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assert(std::as_const(jv).end() == std::ranges::next(std::as_const(jv).begin(), 16));
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static_assert(HasConstEnd<decltype(jv)>);
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static_assert(!std::same_as<decltype(jv.end()), decltype(std::as_const(jv).end())>);
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static_assert(!std::ranges::common_range<decltype(jv)>);
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static_assert(!std::ranges::common_range<const decltype(jv)>);
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}
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{
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std::ranges::join_view jv(ConstNotRange{});
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static_assert(!HasConstEnd<decltype(jv)>);
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}
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// Has some empty children.
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{
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CopyableChild children[4] = {CopyableChild(buffer[0], 4), CopyableChild(buffer[1], 0), CopyableChild(buffer[2], 1), CopyableChild(buffer[3], 0)};
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auto jv = std::ranges::join_view(ParentView(children));
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assert(jv.end() == std::ranges::next(jv.begin(), 5));
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}
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// Parent is empty.
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{
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CopyableChild children[4] = {CopyableChild(buffer[0]), CopyableChild(buffer[1]), CopyableChild(buffer[2]), CopyableChild(buffer[3])};
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std::ranges::join_view jv(ParentView(children, 0));
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assert(jv.end() == jv.begin());
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}
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// Parent size is one.
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{
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CopyableChild children[1] = {CopyableChild(buffer[0])};
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std::ranges::join_view jv(ParentView(children, 1));
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assert(jv.end() == std::ranges::next(jv.begin(), 4));
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}
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// Parent and child size is one.
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{
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CopyableChild children[1] = {CopyableChild(buffer[0], 1)};
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std::ranges::join_view jv(ParentView(children, 1));
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assert(jv.end() == std::ranges::next(jv.begin()));
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}
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// Parent size is one child is empty
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{
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CopyableChild children[1] = {CopyableChild(buffer[0], 0)};
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std::ranges::join_view jv(ParentView(children, 1));
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assert(jv.end() == jv.begin());
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}
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// Has all empty children.
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{
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CopyableChild children[4] = {CopyableChild(buffer[0], 0), CopyableChild(buffer[1], 0), CopyableChild(buffer[2], 0), CopyableChild(buffer[3], 0)};
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auto jv = std::ranges::join_view(ParentView(children));
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assert(jv.end() == jv.begin());
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}
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// First child is empty, others are not.
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{
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CopyableChild children[4] = {CopyableChild(buffer[0], 4), CopyableChild(buffer[1], 0), CopyableChild(buffer[2], 0), CopyableChild(buffer[3], 0)};
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auto jv = std::ranges::join_view(ParentView(children));
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assert(jv.end() == std::ranges::next(jv.begin(), 4));
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}
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// Last child is empty, others are not.
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{
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CopyableChild children[4] = {CopyableChild(buffer[0], 4), CopyableChild(buffer[1], 4), CopyableChild(buffer[2], 4), CopyableChild(buffer[3], 0)};
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auto jv = std::ranges::join_view(ParentView(children));
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assert(jv.end() == std::ranges::next(jv.begin(), 12));
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}
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return true;
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}
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int main(int, char**) {
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test();
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static_assert(test());
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return 0;
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}
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