38 lines
783 B
C++
38 lines
783 B
C++
// Copyright (c) 2017-2018 The PIVX developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#pragma once
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/*
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Template used for reverse iteration in C++11 range-based for loops.
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std::vector<int> v = {1, 2, 3, 4, 5};
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for (auto x : reverse_iterate(v))
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std::cout << x << " ";
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*/
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template <typename T>
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class reverse_range
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{
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T &x;
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public:
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reverse_range(T &x) : x(x) {}
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auto begin() const -> decltype(this->x.rbegin())
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{
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return x.rbegin();
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}
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auto end() const -> decltype(this->x.rend())
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{
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return x.rend();
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}
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};
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template <typename T>
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reverse_range<T> reverse_iterate(T &x)
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{
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return reverse_range<T>(x);
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}
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