808d794a45
Previously, tests for whether comparison using == was supported by iterators derived from ranges adaptors was spread throughout the testing codebase. This PR centralizes the implementation of those tests.
73 lines
1.9 KiB
C++
73 lines
1.9 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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// friend constexpr bool operator==(const inner-iterator& x, const inner-iterator& y);
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// requires forward_range<Base>;
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//
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// friend constexpr bool operator==(const inner-iterator& x, default_sentinel_t);
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#include <ranges>
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#include <concepts>
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#include <string_view>
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#include "../types.h"
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#include "test_range.h"
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constexpr bool test() {
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// When `View` is a forward range, `inner-iterator` supports both overloads of `operator==`.
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{
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SplitViewForward v("abc def", " ");
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auto val = *v.begin();
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auto b = val.begin();
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std::same_as<std::default_sentinel_t> decltype(auto) e = val.end();
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// inner-iterator == inner-iterator
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{
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assert(b == b);
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assert(!(b != b));
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}
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// inner-iterator == default_sentinel
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{
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assert(!(b == e));
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assert(b != e);
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assert(!(b == std::default_sentinel));
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assert(b != std::default_sentinel);
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}
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}
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// When `View` is an input range, `inner-iterator only supports comparing an `inner-iterator` to the default sentinel.
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{
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SplitViewInput v("abc def", ' ');
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auto val = *v.begin();
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auto b = val.begin();
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std::same_as<std::default_sentinel_t> decltype(auto) e = val.end();
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static_assert(!weakly_equality_comparable_with<decltype(b), decltype(b)>);
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assert(!(b == std::default_sentinel));
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assert(b != std::default_sentinel);
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assert(!(b == e));
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assert(b != e);
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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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