b64f8b07c1
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@119395 91177308-0d34-0410-b5e6-96231b3b80d8
105 lines
3.0 KiB
C++
105 lines
3.0 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is dual licensed under the MIT and the University of Illinois Open
|
|
// Source Licenses. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// <algorithm>
|
|
|
|
// template<BidirectionalIterator Iter, Predicate<auto, Iter::value_type> Pred>
|
|
// requires ShuffleIterator<Iter>
|
|
// && CopyConstructible<Pred>
|
|
// Iter
|
|
// partition(Iter first, Iter last, Pred pred);
|
|
|
|
#include <algorithm>
|
|
#include <cassert>
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
#include <memory>
|
|
#endif
|
|
|
|
#include "../../iterators.h"
|
|
|
|
struct is_odd
|
|
{
|
|
bool operator()(const int& i) const {return i & 1;}
|
|
};
|
|
|
|
template <class Iter>
|
|
void
|
|
test()
|
|
{
|
|
// check mixed
|
|
int ia[] = {1, 2, 3, 4, 5, 6, 7, 8 ,9};
|
|
const unsigned sa = sizeof(ia)/sizeof(ia[0]);
|
|
Iter r = std::partition(Iter(ia), Iter(ia + sa), is_odd());
|
|
assert(base(r) == ia + 5);
|
|
for (int* i = ia; i < base(r); ++i)
|
|
assert(is_odd()(*i));
|
|
for (int* i = base(r); i < ia+sa; ++i)
|
|
assert(!is_odd()(*i));
|
|
// check empty
|
|
r = std::partition(Iter(ia), Iter(ia), is_odd());
|
|
assert(base(r) == ia);
|
|
// check all false
|
|
for (unsigned i = 0; i < sa; ++i)
|
|
ia[i] = 2*i;
|
|
r = std::partition(Iter(ia), Iter(ia+sa), is_odd());
|
|
assert(base(r) == ia);
|
|
// check all true
|
|
for (unsigned i = 0; i < sa; ++i)
|
|
ia[i] = 2*i+1;
|
|
r = std::partition(Iter(ia), Iter(ia+sa), is_odd());
|
|
assert(base(r) == ia+sa);
|
|
// check all true but last
|
|
for (unsigned i = 0; i < sa; ++i)
|
|
ia[i] = 2*i+1;
|
|
ia[sa-1] = 10;
|
|
r = std::partition(Iter(ia), Iter(ia+sa), is_odd());
|
|
assert(base(r) == ia+sa-1);
|
|
for (int* i = ia; i < base(r); ++i)
|
|
assert(is_odd()(*i));
|
|
for (int* i = base(r); i < ia+sa; ++i)
|
|
assert(!is_odd()(*i));
|
|
// check all true but first
|
|
for (unsigned i = 0; i < sa; ++i)
|
|
ia[i] = 2*i+1;
|
|
ia[0] = 10;
|
|
r = std::partition(Iter(ia), Iter(ia+sa), is_odd());
|
|
assert(base(r) == ia+sa-1);
|
|
for (int* i = ia; i < base(r); ++i)
|
|
assert(is_odd()(*i));
|
|
for (int* i = base(r); i < ia+sa; ++i)
|
|
assert(!is_odd()(*i));
|
|
// check all false but last
|
|
for (unsigned i = 0; i < sa; ++i)
|
|
ia[i] = 2*i;
|
|
ia[sa-1] = 11;
|
|
r = std::partition(Iter(ia), Iter(ia+sa), is_odd());
|
|
assert(base(r) == ia+1);
|
|
for (int* i = ia; i < base(r); ++i)
|
|
assert(is_odd()(*i));
|
|
for (int* i = base(r); i < ia+sa; ++i)
|
|
assert(!is_odd()(*i));
|
|
// check all false but first
|
|
for (unsigned i = 0; i < sa; ++i)
|
|
ia[i] = 2*i;
|
|
ia[0] = 11;
|
|
r = std::partition(Iter(ia), Iter(ia+sa), is_odd());
|
|
assert(base(r) == ia+1);
|
|
for (int* i = ia; i < base(r); ++i)
|
|
assert(is_odd()(*i));
|
|
for (int* i = base(r); i < ia+sa; ++i)
|
|
assert(!is_odd()(*i));
|
|
}
|
|
|
|
int main()
|
|
{
|
|
test<bidirectional_iterator<int*> >();
|
|
test<random_access_iterator<int*> >();
|
|
test<int*>();
|
|
}
|