| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++03, c++11, c++14, c++17 |
| |
| // Some basic examples of how drop_while_view might be used in the wild. This is a general |
| // collection of sample algorithms and functions that try to mock general usage of |
| // this view. |
| |
| #include <algorithm> |
| #include <cassert> |
| #include <ranges> |
| #include <string_view> |
| |
| int main(int, char**) { |
| using namespace std::string_view_literals; |
| std::string_view source = " \t \t \t hello there"sv; |
| auto is_invisible = [](const auto x) { return x == ' ' || x == '\t'; }; |
| auto skip_ws = std::views::drop_while(source, is_invisible); |
| assert(std::ranges::equal(skip_ws, "hello there"sv)); |
| |
| return 0; |
| } |
