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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <set>
// class set
// iterator erase(const_iterator position);
#include <set>
#include <cassert>
int main()
{
{
typedef std::set<int> M;
typedef int V;
typedef M::iterator I;
V ar[] =
{
1,
2,
3,
4,
5,
6,
7,
8
};
M m(ar, ar + sizeof(ar)/sizeof(ar[0]));
assert(m.size() == 8);
I i = m.erase(next(m.cbegin(), 3));
assert(m.size() == 7);
assert(i == next(m.begin(), 3));
assert(*next(m.begin(), 0) == 1);
assert(*next(m.begin(), 1) == 2);
assert(*next(m.begin(), 2) == 3);
assert(*next(m.begin(), 3) == 5);
assert(*next(m.begin(), 4) == 6);
assert(*next(m.begin(), 5) == 7);
assert(*next(m.begin(), 6) == 8);
i = m.erase(next(m.cbegin(), 0));
assert(m.size() == 6);
assert(i == m.begin());
assert(*next(m.begin(), 0) == 2);
assert(*next(m.begin(), 1) == 3);
assert(*next(m.begin(), 2) == 5);
assert(*next(m.begin(), 3) == 6);
assert(*next(m.begin(), 4) == 7);
assert(*next(m.begin(), 5) == 8);
i = m.erase(next(m.cbegin(), 5));
assert(m.size() == 5);
assert(i == m.end());
assert(*next(m.begin(), 0) == 2);
assert(*next(m.begin(), 1) == 3);
assert(*next(m.begin(), 2) == 5);
assert(*next(m.begin(), 3) == 6);
assert(*next(m.begin(), 4) == 7);
i = m.erase(next(m.cbegin(), 1));
assert(m.size() == 4);
assert(i == next(m.begin()));
assert(*next(m.begin(), 0) == 2);
assert(*next(m.begin(), 1) == 5);
assert(*next(m.begin(), 2) == 6);
assert(*next(m.begin(), 3) == 7);
i = m.erase(next(m.cbegin(), 2));
assert(m.size() == 3);
assert(i == next(m.begin(), 2));
assert(*next(m.begin(), 0) == 2);
assert(*next(m.begin(), 1) == 5);
assert(*next(m.begin(), 2) == 7);
i = m.erase(next(m.cbegin(), 2));
assert(m.size() == 2);
assert(i == next(m.begin(), 2));
assert(*next(m.begin(), 0) == 2);
assert(*next(m.begin(), 1) == 5);
i = m.erase(next(m.cbegin(), 0));
assert(m.size() == 1);
assert(i == next(m.begin(), 0));
assert(*next(m.begin(), 0) == 5);
i = m.erase(m.cbegin());
assert(m.size() == 0);
assert(i == m.begin());
assert(i == m.end());
}
}
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