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323 lines
9.3 KiB
C++
323 lines
9.3 KiB
C++
// Range v3 library
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//
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// Copyright Eric Niebler 2014-present
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//
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// Use, modification and distribution is subject to the
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// Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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//
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// Project home: https://github.com/ericniebler/range-v3
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//
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// Copyright 2005 - 2007 Adobe Systems Incorporated
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// Distributed under the MIT License(see accompanying file LICENSE_1_0_0.txt
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// or a copy at http://stlab.adobe.com/licenses.html)
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//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include <utility>
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#include <vector>
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#include <range/v3/core.hpp>
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#include <range/v3/algorithm/rotate.hpp>
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#include "../simple_test.hpp"
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#include "../test_iterators.hpp"
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template<class Iter, class Sent = Iter>
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void test()
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{
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using namespace ranges;
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using Res = subrange<Iter>;
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int ia[] = {0};
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const unsigned sa = sizeof(ia)/sizeof(ia[0]);
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Res r = rotate(Iter(ia), Iter(ia), Sent(ia));
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CHECK(base(r.begin()) == ia);
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CHECK(base(r.end()) == ia);
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CHECK(ia[0] == 0);
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r = rotate(Iter(ia), Iter(ia), Sent(ia+sa));
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CHECK(base(r.begin()) == ia+sa);
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CHECK(base(r.end()) == ia+sa);
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CHECK(ia[0] == 0);
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r = rotate(Iter(ia), Iter(ia+sa), Sent(ia+sa));
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CHECK(base(r.begin()) == ia);
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CHECK(base(r.end()) == ia+sa);
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CHECK(ia[0] == 0);
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int ib[] = {0, 1};
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const unsigned sb = sizeof(ib)/sizeof(ib[0]);
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r = rotate(Iter(ib), Iter(ib), Sent(ib+sb));
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CHECK(base(r.begin()) == ib+sb);
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CHECK(base(r.end()) == ib+sb);
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CHECK(ib[0] == 0);
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CHECK(ib[1] == 1);
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r = rotate(Iter(ib), Iter(ib+1), Sent(ib+sb));
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CHECK(base(r.end()) == ib+sb);
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CHECK(base(r.begin()) == ib+1);
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CHECK(ib[0] == 1);
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CHECK(ib[1] == 0);
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r = rotate(Iter(ib), Iter(ib+sb), Sent(ib+sb));
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CHECK(base(r.end()) == ib+sb);
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CHECK(base(r.begin()) == ib);
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CHECK(ib[0] == 1);
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CHECK(ib[1] == 0);
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int ic[] = {0, 1, 2};
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const unsigned sc = sizeof(ic)/sizeof(ic[0]);
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r = rotate(Iter(ic), Iter(ic), Sent(ic+sc));
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CHECK(base(r.begin()) == ic+sc);
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CHECK(base(r.end()) == ic+sc);
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CHECK(ic[0] == 0);
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CHECK(ic[1] == 1);
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CHECK(ic[2] == 2);
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r = rotate(Iter(ic), Iter(ic+1), Sent(ic+sc));
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CHECK(base(r.begin()) == ic+2);
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CHECK(base(r.end()) == ic+sc);
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CHECK(ic[0] == 1);
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CHECK(ic[1] == 2);
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CHECK(ic[2] == 0);
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r = rotate(Iter(ic), Iter(ic+2), Sent(ic+sc));
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CHECK(base(r.begin()) == ic+1);
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CHECK(base(r.end()) == ic+sc);
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CHECK(ic[0] == 0);
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CHECK(ic[1] == 1);
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CHECK(ic[2] == 2);
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r = rotate(Iter(ic), Iter(ic+sc), Sent(ic+sc));
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CHECK(base(r.begin()) == ic);
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CHECK(base(r.end()) == ic+sc);
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CHECK(ic[0] == 0);
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CHECK(ic[1] == 1);
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CHECK(ic[2] == 2);
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int id[] = {0, 1, 2, 3};
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const unsigned sd = sizeof(id)/sizeof(id[0]);
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r = rotate(Iter(id), Iter(id), Sent(id+sd));
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CHECK(base(r.begin()) == id+sd);
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CHECK(base(r.end()) == id+sd);
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CHECK(id[0] == 0);
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CHECK(id[1] == 1);
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CHECK(id[2] == 2);
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CHECK(id[3] == 3);
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r = rotate(Iter(id), Iter(id+1), Sent(id+sd));
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CHECK(base(r.begin()) == id+3);
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CHECK(base(r.end()) == id+sd);
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CHECK(id[0] == 1);
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CHECK(id[1] == 2);
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CHECK(id[2] == 3);
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CHECK(id[3] == 0);
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r = rotate(Iter(id), Iter(id+2), Sent(id+sd));
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CHECK(base(r.begin()) == id+2);
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CHECK(base(r.end()) == id+sd);
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CHECK(id[0] == 3);
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CHECK(id[1] == 0);
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CHECK(id[2] == 1);
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CHECK(id[3] == 2);
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r = rotate(Iter(id), Iter(id+3), Sent(id+sd));
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CHECK(base(r.begin()) == id+1);
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CHECK(base(r.end()) == id+sd);
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CHECK(id[0] == 2);
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CHECK(id[1] == 3);
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CHECK(id[2] == 0);
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CHECK(id[3] == 1);
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r = rotate(Iter(id), Iter(id+sd), Sent(id+sd));
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CHECK(base(r.begin()) == id);
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CHECK(base(r.end()) == id+sd);
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CHECK(id[0] == 2);
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CHECK(id[1] == 3);
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CHECK(id[2] == 0);
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CHECK(id[3] == 1);
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int ie[] = {0, 1, 2, 3, 4};
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const unsigned se = sizeof(ie)/sizeof(ie[0]);
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r = rotate(Iter(ie), Iter(ie), Sent(ie+se));
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CHECK(base(r.begin()) == ie+se);
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CHECK(base(r.end()) == ie+se);
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CHECK(ie[0] == 0);
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CHECK(ie[1] == 1);
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CHECK(ie[2] == 2);
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CHECK(ie[3] == 3);
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CHECK(ie[4] == 4);
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r = rotate(Iter(ie), Iter(ie+1), Sent(ie+se));
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CHECK(base(r.begin()) == ie+4);
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CHECK(base(r.end()) == ie+se);
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CHECK(ie[0] == 1);
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CHECK(ie[1] == 2);
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CHECK(ie[2] == 3);
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CHECK(ie[3] == 4);
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CHECK(ie[4] == 0);
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r = rotate(Iter(ie), Iter(ie+2), Sent(ie+se));
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CHECK(base(r.begin()) == ie+3);
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CHECK(base(r.end()) == ie+se);
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CHECK(ie[0] == 3);
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CHECK(ie[1] == 4);
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CHECK(ie[2] == 0);
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CHECK(ie[3] == 1);
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CHECK(ie[4] == 2);
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r = rotate(Iter(ie), Iter(ie+3), Sent(ie+se));
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CHECK(base(r.begin()) == ie+2);
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CHECK(base(r.end()) == ie+se);
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CHECK(ie[0] == 1);
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CHECK(ie[1] == 2);
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CHECK(ie[2] == 3);
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CHECK(ie[3] == 4);
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CHECK(ie[4] == 0);
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r = rotate(Iter(ie), Iter(ie+4), Sent(ie+se));
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CHECK(base(r.begin()) == ie+1);
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CHECK(base(r.end()) == ie+se);
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CHECK(ie[0] == 0);
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CHECK(ie[1] == 1);
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CHECK(ie[2] == 2);
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CHECK(ie[3] == 3);
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CHECK(ie[4] == 4);
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r = rotate(Iter(ie), Iter(ie+se), Sent(ie+se));
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CHECK(base(r.begin()) == ie);
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CHECK(base(r.end()) == ie+se);
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CHECK(ie[0] == 0);
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CHECK(ie[1] == 1);
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CHECK(ie[2] == 2);
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CHECK(ie[3] == 3);
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CHECK(ie[4] == 4);
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int ig[] = {0, 1, 2, 3, 4, 5};
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const unsigned sg = sizeof(ig)/sizeof(ig[0]);
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r = rotate(Iter(ig), Iter(ig), Sent(ig+sg));
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CHECK(base(r.begin()) == ig+sg);
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CHECK(base(r.end()) == ig+sg);
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CHECK(ig[0] == 0);
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CHECK(ig[1] == 1);
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CHECK(ig[2] == 2);
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CHECK(ig[3] == 3);
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CHECK(ig[4] == 4);
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CHECK(ig[5] == 5);
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r = rotate(Iter(ig), Iter(ig+1), Sent(ig+sg));
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CHECK(base(r.begin()) == ig+5);
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CHECK(base(r.end()) == ig+sg);
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CHECK(ig[0] == 1);
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CHECK(ig[1] == 2);
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CHECK(ig[2] == 3);
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CHECK(ig[3] == 4);
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CHECK(ig[4] == 5);
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CHECK(ig[5] == 0);
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r = rotate(Iter(ig), Iter(ig+2), Sent(ig+sg));
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CHECK(base(r.begin()) == ig+4);
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CHECK(base(r.end()) == ig+sg);
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CHECK(ig[0] == 3);
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CHECK(ig[1] == 4);
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CHECK(ig[2] == 5);
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CHECK(ig[3] == 0);
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CHECK(ig[4] == 1);
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CHECK(ig[5] == 2);
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r = rotate(Iter(ig), Iter(ig+3), Sent(ig+sg));
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CHECK(base(r.begin()) == ig+3);
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CHECK(base(r.end()) == ig+sg);
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CHECK(ig[0] == 0);
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CHECK(ig[1] == 1);
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CHECK(ig[2] == 2);
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CHECK(ig[3] == 3);
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CHECK(ig[4] == 4);
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CHECK(ig[5] == 5);
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r = rotate(Iter(ig), Iter(ig+4), Sent(ig+sg));
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CHECK(base(r.begin()) == ig+2);
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CHECK(base(r.end()) == ig+sg);
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CHECK(ig[0] == 4);
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CHECK(ig[1] == 5);
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CHECK(ig[2] == 0);
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CHECK(ig[3] == 1);
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CHECK(ig[4] == 2);
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CHECK(ig[5] == 3);
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r = rotate(Iter(ig), Iter(ig+5), Sent(ig+sg));
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CHECK(base(r.begin()) == ig+1);
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CHECK(base(r.end()) == ig+sg);
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CHECK(ig[0] == 3);
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CHECK(ig[1] == 4);
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CHECK(ig[2] == 5);
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CHECK(ig[3] == 0);
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CHECK(ig[4] == 1);
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CHECK(ig[5] == 2);
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r = rotate(Iter(ig), Iter(ig+sg), Sent(ig+sg));
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CHECK(base(r.begin()) == ig);
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CHECK(base(r.end()) == ig+sg);
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CHECK(ig[0] == 3);
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CHECK(ig[1] == 4);
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CHECK(ig[2] == 5);
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CHECK(ig[3] == 0);
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CHECK(ig[4] == 1);
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CHECK(ig[5] == 2);
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}
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constexpr bool test_constexpr()
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{
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int rgi[] = {0, 1, 2, 3, 4, 5};
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auto r = ranges::rotate(rgi, rgi + 2);
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STATIC_CHECK_RETURN(r.begin() == rgi + 4);
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STATIC_CHECK_RETURN(r.end() == ranges::end(rgi));
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STATIC_CHECK_RETURN(rgi[0] == 2);
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STATIC_CHECK_RETURN(rgi[1] == 3);
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STATIC_CHECK_RETURN(rgi[2] == 4);
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STATIC_CHECK_RETURN(rgi[3] == 5);
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STATIC_CHECK_RETURN(rgi[4] == 0);
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STATIC_CHECK_RETURN(rgi[5] == 1);
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return true;
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}
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int main()
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{
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test<ForwardIterator<int *>>();
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test<BidirectionalIterator<int *>>();
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test<RandomAccessIterator<int *>>();
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test<ForwardIterator<int *>, Sentinel<int*>>();
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test<BidirectionalIterator<int *>, Sentinel<int*>>();
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test<RandomAccessIterator<int *>, Sentinel<int*>>();
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// test rvalue ranges
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{
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int rgi[] = {0,1,2,3,4,5};
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auto r = ranges::rotate(ranges::views::all(rgi), rgi+2);
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CHECK(r.begin() == rgi+4);
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CHECK(r.end() == ranges::end(rgi));
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CHECK(rgi[0] == 2);
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CHECK(rgi[1] == 3);
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CHECK(rgi[2] == 4);
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CHECK(rgi[3] == 5);
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CHECK(rgi[4] == 0);
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CHECK(rgi[5] == 1);
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}
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{
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int rgi[] = {0,1,2,3,4,5};
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auto r = ranges::rotate(std::move(rgi), rgi+2);
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#ifndef RANGES_WORKAROUND_MSVC_573728
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CHECK(::is_dangling(r));
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#endif // RANGES_WORKAROUND_MSVC_573728
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CHECK(rgi[0] == 2);
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CHECK(rgi[1] == 3);
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CHECK(rgi[2] == 4);
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CHECK(rgi[3] == 5);
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CHECK(rgi[4] == 0);
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CHECK(rgi[5] == 1);
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}
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{
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std::vector<int> rgi{0,1,2,3,4,5};
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auto r = ranges::rotate(std::move(rgi), rgi.begin()+2);
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CHECK(::is_dangling(r));
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CHECK(rgi[0] == 2);
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CHECK(rgi[1] == 3);
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CHECK(rgi[2] == 4);
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CHECK(rgi[3] == 5);
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CHECK(rgi[4] == 0);
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CHECK(rgi[5] == 1);
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}
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{
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STATIC_CHECK(test_constexpr());
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}
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return ::test_result();
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}
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