29 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 11// Some basic examples of how drop_while_view might be used in the wild. This is a general12// collection of sample algorithms and functions that try to mock general usage of13// this view.14 15#include <algorithm>16#include <cassert>17#include <ranges>18#include <string_view>19 20int main(int, char**) {21 using namespace std::string_view_literals;22 std::string_view source = " \t \t \t hello there"sv;23 auto is_invisible = [](const auto x) { return x == ' ' || x == '\t'; };24 auto skip_ws = std::views::drop_while(source, is_invisible);25 assert(std::ranges::equal(skip_ws, "hello there"sv));26 27 return 0;28}29