e53c461bf3
Note that this class was called just `split_view` in the original One Ranges Proposal and was renamed to `lazy_split_view` by [P2210](https://wg21.link/p2210). Co-authored-by: zoecarver <z.zoelec2@gmail.com> Differential Revision: https://reviews.llvm.org/D107500
87 lines
2.0 KiB
C++
87 lines
2.0 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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// constexpr outer-iterator& outer-iterator::operator++();
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// constexpr decltype(auto) outer-iterator::operator++(int);
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// Note that corner cases are tested in `range.lazy.split/general.pass.cpp`.
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#include <ranges>
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#include <algorithm>
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#include <string_view>
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#include "../small_string.h"
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#include "../types.h"
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constexpr bool test() {
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// Can call `outer-iterator::operator++`; `View` is a forward range.
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{
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SplitViewForward v("abc def ghi", " ");
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// ++i
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{
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auto i = v.begin();
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assert(*i == "abc"_str);
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decltype(auto) i2 = ++i;
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static_assert(std::is_lvalue_reference_v<decltype(i2)>);
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assert(&i2 == &i);
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assert(*i2 == "def"_str);
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}
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// i++
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{
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auto i = v.begin();
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assert(*i == "abc"_str);
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decltype(auto) i2 = i++;
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static_assert(!std::is_reference_v<decltype(i2)>);
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assert(*i2 == "abc"_str);
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assert(*i == "def"_str);
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}
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}
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// Can call `outer-iterator::operator++`; `View` is an input range.
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{
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SplitViewInput v("abc def ghi", ' ');
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// ++i
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{
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auto i = v.begin();
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assert(*i == "abc"_str);
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decltype(auto) i2 = ++i;
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static_assert(std::is_lvalue_reference_v<decltype(i2)>);
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assert(&i2 == &i);
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assert(*i2 == "def"_str);
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}
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// i++
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{
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auto i = v.begin();
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assert(*i == "abc"_str);
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static_assert(std::is_void_v<decltype(i++)>);
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i++;
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assert(*i == "def"_str);
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}
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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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