//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <algorithm>
// template<ShuffleIterator Iter>
// Iter
// rotate(Iter first, Iter middle, Iter last);
#include <algorithm>
#include <cassert>
#include <memory>
#include "test_macros.h"
#include "test_iterators.h"
template <class Iter>
TEST_CONSTEXPR_CXX17 bool
test()
{
int ia[] = {0};
const int sa = static_cast<int>(sizeof(ia)/sizeof(ia[0]));
Iter r = std::rotate(Iter(ia), Iter(ia), Iter(ia));
assert(base(r) == ia);
assert(ia[0] == 0);
r = std::rotate(Iter(ia), Iter(ia), Iter(ia+sa));
assert(base(r) == ia+sa);
assert(ia[0] == 0);
r = std::rotate(Iter(ia), Iter(ia+sa), Iter(ia+sa));
assert(base(r) == ia);
assert(ia[0] == 0);
int ib[] = {0, 1};
const int sb = static_cast<int>(sizeof(ib)/sizeof(ib[0]));
r = std::rotate(Iter(ib), Iter(ib), Iter(ib+sb));
assert(base(r) == ib+sb);
assert(ib[0] == 0);
assert(ib[1] == 1);
r = std::rotate(Iter(ib), Iter(ib+1), Iter(ib+sb));
assert(base(r) == ib+1);
assert(ib[0] == 1);
assert(ib[1] == 0);
r = std::rotate(Iter(ib), Iter(ib+sb), Iter(ib+sb));
assert(base(r) == ib);
assert(ib[0] == 1);
assert(ib[1] == 0);
int ic[] = {0, 1, 2};
const int sc = static_cast<int>(sizeof(ic)/sizeof(ic[0]));
r = std::rotate(Iter(ic), Iter(ic), Iter(ic+sc));
assert(base(r) == ic+sc);
assert(ic[0] == 0);
assert(ic[1] == 1);
assert(ic[2] == 2);
r = std::rotate(Iter(ic), Iter(ic+1), Iter(ic+sc));
assert(base(r) == ic+2);
assert(ic[0] == 1);
assert(ic[1] == 2);
assert(ic[2] == 0);
r = std::rotate(Iter(ic), Iter(ic+2), Iter(ic+sc));
assert(base(r) == ic+1);
assert(ic[0] == 0);
assert(ic[1] == 1);
assert(ic[2] == 2);
r = std::rotate(Iter(ic), Iter(ic+sc), Iter(ic+sc));
assert(base(r) == ic);
assert(ic[0] == 0);
assert(ic[1] == 1);
assert(ic[2] == 2);
int id[] = {0, 1, 2, 3};
const int sd = static_cast<int>(sizeof(id)/sizeof(id[0]));
r = std::rotate(Iter(id), Iter(id), Iter(id+sd));
assert(base(r) == id+sd);
assert(id[0] == 0);
assert(id[1] == 1);
assert(id[2] == 2);
assert(id[3] == 3);
r = std::rotate(Iter(id), Iter(id+1), Iter(id+sd));
assert(base(r) == id+3);
assert(id[0] == 1);
assert(id[1] == 2);
assert(id[2] == 3);
assert(id[3] == 0);
r = std::rotate(Iter(id), Iter(id+2), Iter(id+sd));
assert(base(r) == id+2);
assert(id[0] == 3);
assert(id[1] == 0);
assert(id[2] == 1);
assert(id[3] == 2);
r = std::rotate(Iter(id), Iter(id+3), Iter(id+sd));
assert(base(r) == id+1);
assert(id[0] == 2);
assert(id[1] == 3);
assert(id[2] == 0);
assert(id[3] == 1);
r = std::rotate(Iter(id), Iter(id+sd), Iter(id+sd));
assert(base(r) == id);
assert(id[0] == 2);
assert(id[1] == 3);
assert(id[2] == 0);
assert(id[3] == 1);
int ie[] = {0, 1, 2, 3, 4};
const int se = static_cast<int>(sizeof(ie)/sizeof(ie[0]));
r = std::rotate(Iter(ie), Iter(ie), Iter(ie+se));
assert(base(r) == ie+se);
assert(ie[0] == 0);
assert(ie[1] == 1);
assert(ie[2] == 2);
assert(ie[3] == 3);
assert(ie[4] == 4);
r = std::rotate(Iter(ie), Iter(ie+1), Iter(ie+se));
assert(base(r) == ie+4);
assert(ie[0] == 1);
assert(ie[1] == 2);
assert(ie[2] == 3);
assert(ie[3] == 4);
assert(ie[4] == 0);
r = std::rotate(Iter(ie), Iter(ie+2), Iter(ie+se));
assert(base(r) == ie+3);
assert(ie[0] == 3);
assert(ie[1] == 4);
assert(ie[2] == 0);
assert(ie[3] == 1);
assert(ie[4] == 2);
r = std::rotate(Iter(ie), Iter(ie+3), Iter(ie+se));
assert(base(r) == ie+2);
assert(ie[0] == 1);
assert(ie[1] == 2);
assert(ie[2] == 3);
assert(ie[3] == 4);
assert(ie[4] == 0);
r = std::rotate(Iter(ie), Iter(ie+4), Iter(ie+se));
assert(base(r) == ie+1);
assert(ie[0] == 0);
assert(ie[1] == 1);
assert(ie[2] == 2);
assert(ie[3] == 3);
assert(ie[4] == 4);
r = std::rotate(Iter(ie), Iter(ie+se), Iter(ie+se));
assert(base(r) == ie);
assert(ie[0] == 0);
assert(ie[1] == 1);
assert(ie[2] == 2);
assert(ie[3] == 3);
assert(ie[4] == 4);
int ig[] = {0, 1, 2, 3, 4, 5};
const int sg = static_cast<int>(sizeof(ig)/sizeof(ig[0]));
r = std::rotate(Iter(ig), Iter(ig), Iter(ig+sg));
assert(base(r) == ig+sg);
assert(ig[0] == 0);
assert(ig[1] == 1);
assert(ig[2] == 2);
assert(ig[3] == 3);
assert(ig[4] == 4);
assert(ig[5] == 5);
r = std::rotate(Iter(ig), Iter(ig+1), Iter(ig+sg));
assert(base(r) == ig+5);
assert(ig[0] == 1);
assert(ig[1] == 2);
assert(ig[2] == 3);
assert(ig[3] == 4);
assert(ig[4] == 5);
assert(ig[5] == 0);
r = std::rotate(Iter(ig), Iter(ig+2), Iter(ig+sg));
assert(base(r) == ig+4);
assert(ig[0] == 3);
assert(ig[1] == 4);
assert(ig[2] == 5);
assert(ig[3] == 0);
assert(ig[4] == 1);
assert(ig[5] == 2);
r = std::rotate(Iter(ig), Iter(ig+3), Iter(ig+sg));
assert(base(r) == ig+3);
assert(ig[0] == 0);
assert(ig[1] == 1);
assert(ig[2] == 2);
assert(ig[3] == 3);
assert(ig[4] == 4);
assert(ig[5] == 5);
r = std::rotate(Iter(ig), Iter(ig+4), Iter(ig+sg));
assert(base(r) == ig+2);
assert(ig[0] == 4);
assert(ig[1] == 5);
assert(ig[2] == 0);
assert(ig[3] == 1);
assert(ig[4] == 2);
assert(ig[5] == 3);
r = std::rotate(Iter(ig), Iter(ig+5), Iter(ig+sg));
assert(base(r) == ig+1);
assert(ig[0] == 3);
assert(ig[1] == 4);
assert(ig[2] == 5);
assert(ig[3] == 0);
assert(ig[4] == 1);
assert(ig[5] == 2);
r = std::rotate(Iter(ig), Iter(ig+sg), Iter(ig+sg));
assert(base(r) == ig);
assert(ig[0] == 3);
assert(ig[1] == 4);
assert(ig[2] == 5);
assert(ig[3] == 0);
assert(ig[4] == 1);
assert(ig[5] == 2);
return true;
}
#if TEST_STD_VER >= 11
template <class Iter>
void
test1()
{
std::unique_ptr<int> ia[1];
const int sa = static_cast<int>(sizeof(ia)/sizeof(ia[0]));
for (int i = 0; i < sa; ++i)
ia[i].reset(new int(i));
Iter r = std::rotate(Iter(ia), Iter(ia), Iter(ia));
assert(base(r) == ia);
assert(*ia[0] == 0);
r = std::rotate(Iter(ia), Iter(ia), Iter(ia+sa));
assert(base(r) == ia+sa);
assert(*ia[0] == 0);
r = std::rotate(Iter(ia), Iter(ia+sa), Iter(ia+sa));
assert(base(r) == ia);
assert(*ia[0] == 0);
std::unique_ptr<int> ib[2];
const int sb = static_cast<int>(sizeof(ib)/sizeof(ib[0]));
for (int i = 0; i < sb; ++i)
ib[i].reset(new int(i));
r = std::rotate(Iter(ib), Iter(ib), Iter(ib+sb));
assert(base(r) == ib+sb);
assert(*ib[0] == 0);
assert(*ib[1] == 1);
r = std::rotate(Iter(ib), Iter(ib+1), Iter(ib+sb));
assert(base(r) == ib+1);
assert(*ib[0] == 1);
assert(*ib[1] == 0);
r = std::rotate(Iter(ib), Iter(ib+sb), Iter(ib+sb));
assert(base(r) == ib);
assert(*ib[0] == 1);
assert(*ib[1] == 0);
std::unique_ptr<int> ic[3];
const int sc = static_cast<int>(sizeof(ic)/sizeof(ic[0]));
for (int i = 0; i < sc; ++i)
ic[i].reset(new int(i));
r = std::rotate(Iter(ic), Iter(ic), Iter(ic+sc));
assert(base(r) == ic+sc);
assert(*ic[0] == 0);
assert(*ic[1] == 1);
assert(*ic[2] == 2);
r = std::rotate(Iter(ic), Iter(ic+1), Iter(ic+sc));
assert(base(r) == ic+2);
assert(*ic[0] == 1);
assert(*ic[1] == 2);
assert(*ic[2] == 0);
r = std::rotate(Iter(ic), Iter(ic+2), Iter(ic+sc));
assert(base(r) == ic+1);
assert(*ic[0] == 0);
assert(*ic[1] == 1);
assert(*ic[2] == 2);
r = std::rotate(Iter(ic), Iter(ic+sc), Iter(ic+sc));
assert(base(r) == ic);
assert(*ic[0] == 0);
assert(*ic[1] == 1);
assert(*ic[2] == 2);
std::unique_ptr<int> id[4];
const int sd = static_cast<int>(sizeof(id)/sizeof(id[0]));
for (int i = 0; i < sd; ++i)
id[i].reset(new int(i));
r = std::rotate(Iter(id), Iter(id), Iter(id+sd));
assert(base(r) == id+sd);
assert(*id[0] == 0);
assert(*id[1] == 1);
assert(*id[2] == 2);
assert(*id[3] == 3);
r = std::rotate(Iter(id), Iter(id+1), Iter(id+sd));
assert(base(r) == id+3);
assert(*id[0] == 1);
assert(*id[1] == 2);
assert(*id[2] == 3);
assert(*id[3] == 0);
r = std::rotate(Iter(id), Iter(id+2), Iter(id+sd));
assert(base(r) == id+2);
assert(*id[0] == 3);
assert(*id[1] == 0);
assert(*id[2] == 1);
assert(*id[3] == 2);
r = std::rotate(Iter(id), Iter(id+3), Iter(id+sd));
assert(base(r) == id+1);
assert(*id[0] == 2);
assert(*id[1] == 3);
assert(*id[2] == 0);
assert(*id[3] == 1);
r = std::rotate(Iter(id), Iter(id+sd), Iter(id+sd));
assert(base(r) == id);
assert(*id[0] == 2);
assert(*id[1] == 3);
assert(*id[2] == 0);
assert(*id[3] == 1);
std::unique_ptr<int> ie[5];
const int se = static_cast<int>(sizeof(ie)/sizeof(ie[0]));
for (int i = 0; i < se; ++i)
ie[i].reset(new int(i));
r = std::rotate(Iter(ie), Iter(ie), Iter(ie+se));
assert(base(r) == ie+se);
assert(*ie[0] == 0);
assert(*ie[1] == 1);
assert(*ie[2] == 2);
assert(*ie[3] == 3);
assert(*ie[4] == 4);
r = std::rotate(Iter(ie), Iter(ie+1), Iter(ie+se));
assert(base(r) == ie+4);
assert(*ie[0] == 1);
assert(*ie[1] == 2);
assert(*ie[2] == 3);
assert(*ie[3] == 4);
assert(*ie[4] == 0);
r = std::rotate(Iter(ie), Iter(ie+2), Iter(ie+se));
assert(base(r) == ie+3);
assert(*ie[0] == 3);
assert(*ie[1] == 4);
assert(*ie[2] == 0);
assert(*ie[3] == 1);
assert(*ie[4] == 2);
r = std::rotate(Iter(ie), Iter(ie+3), Iter(ie+se));
assert(base(r) == ie+2);
assert(*ie[0] == 1);
assert(*ie[1] == 2);
assert(*ie[2] == 3);
assert(*ie[3] == 4);
assert(*ie[4] == 0);
r = std::rotate(Iter(ie), Iter(ie+4), Iter(ie+se));
assert(base(r) == ie+1);
assert(*ie[0] == 0);
assert(*ie[1] == 1);
assert(*ie[2] == 2);
assert(*ie[3] == 3);
assert(*ie[4] == 4);
r = std::rotate(Iter(ie), Iter(ie+se), Iter(ie+se));
assert(base(r) == ie);
assert(*ie[0] == 0);
assert(*ie[1] == 1);
assert(*ie[2] == 2);
assert(*ie[3] == 3);
assert(*ie[4] == 4);
std::unique_ptr<int> ig[6];
const int sg = static_cast<int>(sizeof(ig)/sizeof(ig[0]));
for (int i = 0; i < sg; ++i)
ig[i].reset(new int(i));
r = std::rotate(Iter(ig), Iter(ig), Iter(ig+sg));
assert(base(r) == ig+sg);
assert(*ig[0] == 0);
assert(*ig[1] == 1);
assert(*ig[2] == 2);
assert(*ig[3] == 3);
assert(*ig[4] == 4);
assert(*ig[5] == 5);
r = std::rotate(Iter(ig), Iter(ig+1), Iter(ig+sg));
assert(base(r) == ig+5);
assert(*ig[0] == 1);
assert(*ig[1] == 2);
assert(*ig[2] == 3);
assert(*ig[3] == 4);
assert(*ig[4] == 5);
assert(*ig[5] == 0);
r = std::rotate(Iter(ig), Iter(ig+2), Iter(ig+sg));
assert(base(r) == ig+4);
assert(*ig[0] == 3);
assert(*ig[1] == 4);
assert(*ig[2] == 5);
assert(*ig[3] == 0);
assert(*ig[4] == 1);
assert(*ig[5] == 2);
r = std::rotate(Iter(ig), Iter(ig+3), Iter(ig+sg));
assert(base(r) == ig+3);
assert(*ig[0] == 0);
assert(*ig[1] == 1);
assert(*ig[2] == 2);
assert(*ig[3] == 3);
assert(*ig[4] == 4);
assert(*ig[5] == 5);
r = std::rotate(Iter(ig), Iter(ig+4), Iter(ig+sg));
assert(base(r) == ig+2);
assert(*ig[0] == 4);
assert(*ig[1] == 5);
assert(*ig[2] == 0);
assert(*ig[3] == 1);
assert(*ig[4] == 2);
assert(*ig[5] == 3);
r = std::rotate(Iter(ig), Iter(ig+5), Iter(ig+sg));
assert(base(r) == ig+1);
assert(*ig[0] == 3);
assert(*ig[1] == 4);
assert(*ig[2] == 5);
assert(*ig[3] == 0);
assert(*ig[4] == 1);
assert(*ig[5] == 2);
r = std::rotate(Iter(ig), Iter(ig+sg), Iter(ig+sg));
assert(base(r) == ig);
assert(*ig[0] == 3);
assert(*ig[1] == 4);
assert(*ig[2] == 5);
assert(*ig[3] == 0);
assert(*ig[4] == 1);
assert(*ig[5] == 2);
}
#endif // TEST_STD_VER >= 11
int main(int, char**)
{
test<forward_iterator<int*> >();
test<bidirectional_iterator<int*> >();
test<random_access_iterator<int*> >();
test<int*>();
#if TEST_STD_VER >= 11
test1<forward_iterator<std::unique_ptr<int>*> >();
test1<bidirectional_iterator<std::unique_ptr<int>*> >();
test1<random_access_iterator<std::unique_ptr<int>*> >();
test1<std::unique_ptr<int>*>();
#endif
#if TEST_STD_VER > 17
static_assert(test<forward_iterator<int*> >());
static_assert(test<bidirectional_iterator<int*> >());
static_assert(test<random_access_iterator<int*> >());
static_assert(test<int*>());
#endif // TEST_STD_VER > 17
return 0;
}
Codebase Browser
llvm