| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // UNSUPPORTED: c++03, c++11, c++14, c++17 |
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| 10 | |
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| 11 | // Some basic examples of how drop_while_view might be used in the wild. This is a general |
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| 12 | // collection of sample algorithms and functions that try to mock general usage of |
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| 13 | // this view. |
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| 14 | |
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| 15 | #include <algorithm> |
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| 16 | #include <cassert> |
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| 17 | #include <ranges> |
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| 18 | #include <string_view> |
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| 19 | |
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| 20 | int main(int, char**) { |
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| 21 | using namespace std::string_view_literals; |
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| 22 | std::string_view source = " \t \t \t hello there"sv ; |
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| 23 | auto is_invisible = [](const auto x) { return x == ' ' || x == '\t'; }; |
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| 24 | auto skip_ws = std::views::drop_while(source, is_invisible); |
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| 25 | assert(std::ranges::equal(skip_ws, "hello there"sv )); |
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| 26 | |
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| 27 | return 0; |
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| 28 | } |
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| 29 | |
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