29 lines
1.0 KiB
C++
29 lines
1.0 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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// Some basic examples of how drop_while_view might be used in the wild. This is a general
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// collection of sample algorithms and functions that try to mock general usage of
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// this view.
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#include <algorithm>
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#include <cassert>
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#include <ranges>
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#include <string_view>
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int main(int, char**) {
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using namespace std::string_view_literals;
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std::string_view source = " \t \t \t hello there"sv;
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auto is_invisible = [](const auto x) { return x == ' ' || x == '\t'; };
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auto skip_ws = std::views::drop_while(source, is_invisible);
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assert(std::ranges::equal(skip_ws, "hello there"sv));
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return 0;
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}
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