partition.pass.cpp [plain text]
#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()
{
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));
r = std::partition(Iter(ia), Iter(ia), is_odd());
assert(base(r) == ia);
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);
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);
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));
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));
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));
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*>();
}