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Differential D110774 Diff 376025 libcxx/test/std/ranges/range.adaptors/range.transform/iterator/compare.pass.cpp

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libcxx/test/std/ranges/range.adaptors/range.transform/iterator/compare.pass.cpp

//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
// //
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information. // See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// //
//===----------------------------------------------------------------------===// //===----------------------------------------------------------------------===//
// UNSUPPORTED: c++03, c++11, c++14, c++17 // UNSUPPORTED: c++03, c++11, c++14, c++17
// UNSUPPORTED: libcpp-no-concepts // UNSUPPORTED: libcpp-no-concepts
// UNSUPPORTED: libcpp-has-no-incomplete-ranges // UNSUPPORTED: libcpp-has-no-incomplete-ranges
// transform_view::<iterator>::operator{<,>,<=,>=} // transform_view::<iterator>::operator{<,>,<=,>=,==,!=,<=>}
#include <ranges> #include <ranges>
#include <compare> #include <compare>
#include "test_macros.h" #include "test_macros.h"
#include "test_iterators.h"
#include "../types.h" #include "../types.h"
constexpr bool test() { constexpr bool test() {
{ {
std::ranges::transform_view<ContiguousView, PlusOne> transformView1; // Test a new-school iterator with operator<=>; the transform iterator should also have operator<=>.
auto iter1 = std::move(transformView1).begin(); using It = three_way_contiguous_iterator<int*>;
std::ranges::transform_view<ContiguousView, PlusOne> transformView2; static_assert(std::three_way_comparable<It>);
auto iter2 = std::move(transformView2).begin(); using R = std::ranges::transform_view<std::ranges::subrange<It>, PlusOne>;
assert(iter1 == iter2); static_assert(std::three_way_comparable<std::ranges::iterator_t<R>>);
assert(iter1 + 1 != iter2);
assert(iter1 + 1 == iter2 + 1); int a[] = {1,2,3};
R r = std::ranges::subrange<It>(It(a), It(a+3)) | std::views::transform(PlusOne());
assert(iter1 < iter1 + 1); auto iter1 = r.begin();
assert(iter1 + 1 > iter1); auto iter2 = iter1 + 1;
assert(iter1 <= iter1 + 1);
assert(iter1 <= iter2); assert(!(iter1 < iter1)); assert(iter1 < iter2); assert(!(iter2 < iter1));
assert(iter1 + 1 >= iter2); assert(iter1 <= iter1); assert(iter1 <= iter2); assert(!(iter2 <= iter1));
assert(iter1 >= iter2); assert(!(iter1 > iter1)); assert(!(iter1 > iter2)); assert(iter2 > iter1);
assert(iter1 >= iter1); assert(!(iter1 >= iter2)); assert(iter2 >= iter1);
assert(iter1 == iter1); assert(!(iter1 == iter2)); assert(iter2 == iter2);
assert(!(iter1 != iter1)); assert(iter1 != iter2); assert(!(iter2 != iter2));
assert((iter1 <=> iter2) == std::strong_ordering::less);
assert((iter1 <=> iter1) == std::strong_ordering::equal);
assert((iter2 <=> iter1) == std::strong_ordering::greater);
} }
// TODO: when three_way_comparable is implemented and std::is_eq is implemented, {
// uncomment this. // Test an old-school iterator with no operator<=>; the transform iterator shouldn't have operator<=> either.
// { using It = random_access_iterator<int*>;
// std::ranges::transform_view<ThreeWayCompView, PlusOne> transformView1; static_assert(!std::three_way_comparable<It>);
// auto iter1 = transformView1.begin(); using R = std::ranges::transform_view<std::ranges::subrange<It>, PlusOne>;
// std::ranges::transform_view<ThreeWayCompView, PlusOne> transformView2; static_assert(!std::three_way_comparable<std::ranges::iterator_t<R>>);
// auto iter2 = transformView2.begin();
// int a[] = {1,2,3};
// assert(std::is_eq(iter1 <=> iter2)); R r = std::ranges::subrange<It>(It(a), It(a+3)) | std::views::transform(PlusOne());
// assert(std::is_lteq(iter1 <=> iter2)); auto iter1 = r.begin();
// ++iter2; auto iter2 = iter1 + 1;
// assert(std::is_neq(iter1 <=> iter2));
// assert(std::is_lt(iter1 <=> iter2)); assert(!(iter1 < iter1)); assert(iter1 < iter2); assert(!(iter2 < iter1));
// assert(std::is_gt(iter2 <=> iter1)); assert(iter1 <= iter1); assert(iter1 <= iter2); assert(!(iter2 <= iter1));
// assert(std::is_gteq(iter2 <=> iter1)); assert(!(iter1 > iter1)); assert(!(iter1 > iter2)); assert(iter2 > iter1);
// assert(iter1 >= iter1); assert(!(iter1 >= iter2)); assert(iter2 >= iter1);
// static_assert( std::three_way_comparable<std::iterator_t<std::ranges::transform_view<ThreeWayCompView, PlusOne>>>); assert(iter1 == iter1); assert(!(iter1 == iter2)); assert(iter2 == iter2);
// static_assert(!std::three_way_comparable<std::iterator_t<std::ranges::transform_view<ContiguousView, PlusOne>>>); assert(!(iter1 != iter1)); assert(iter1 != iter2); assert(!(iter2 != iter2));
// } }
return true; return true;
} }
int main(int, char**) { int main(int, char**) {
test(); test();
static_assert(test()); static_assert(test());
return 0; return 0;
} }