fcb8d040e8
Instead of lengthy blurbs, switch to single-line, machine-readable standardized (https://spdx.dev) license identifiers. The Linux kernel switched long ago, so there is strong precedent. Three cases are handled: AGPL-only, Apache-only, and dual licensed. For the latter case, I chose (AGPL-3.0-or-later and Apache-2.0), reasoning that our changes are extensive enough to apply our license. The changes we applied mechanically with a script, except to licenses/README.md. Closes #9937
48 lines
1.1 KiB
C++
48 lines
1.1 KiB
C++
/*
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* Copyright (C) 2015-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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#pragma once
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#include <algorithm>
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// combine two sorted uniqued sequences into a single sorted sequence
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// unique elements are copied, duplicate elements are merged with a
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// binary function.
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template <typename InputIterator1,
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typename InputIterator2,
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typename OutputIterator,
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typename Compare,
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typename Merge>
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OutputIterator
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combine(InputIterator1 begin1, InputIterator1 end1,
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InputIterator2 begin2, InputIterator2 end2,
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OutputIterator out,
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Compare compare,
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Merge merge) {
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while (begin1 != end1 && begin2 != end2) {
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auto& e1 = *begin1;
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auto& e2 = *begin2;
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if (compare(e1, e2)) {
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*out++ = e1;
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++begin1;
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} else if (compare(e2, e1)) {
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*out++ = e2;
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++begin2;
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} else {
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*out++ = merge(e1, e2);
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++begin1;
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++begin2;
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}
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}
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out = std::copy(begin1, end1, out);
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out = std::copy(begin2, end2, out);
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return out;
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}
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