34 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++03, c++11, c++14, c++1710// UNSUPPORTED: no-localization11 12// Check LWG-3698: `regex_iterator` and `join_view` don't work together very well13 14#include <algorithm>15#include <array>16#include <cassert>17#include <ranges>18#include <regex>19#include <string_view>20 21int main(int, char**) {22 char const text[] = "Hello";23 std::regex regex{"[a-z]"};24 25 auto lower =26 std::ranges::subrange(27 std::cregex_iterator(std::ranges::begin(text), std::ranges::end(text), regex), std::cregex_iterator{}) |28 std::views::join | std::views::transform([](auto const& sm) { return std::string_view(sm.first, sm.second); });29 30 assert(std::ranges::equal(lower, std::to_array<std::string_view>({"e", "l", "l", "o"})));31 32 return 0;33}34