erase_iter.pass.cpp
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//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <set>
// class set
// iterator erase(const_iterator position);
#include <set>
#include <cassert>
#include "test_macros.h"
#include "min_allocator.h"
struct TemplateConstructor
{
template<typename T>
TemplateConstructor (const T&) {}
};
bool operator<(const TemplateConstructor&, const TemplateConstructor&) { return false; }
int main(int, char**)
{
{
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());
}
#if TEST_STD_VER >= 11
{
typedef std::set<int, std::less<int>, min_allocator<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());
}
#endif
#if TEST_STD_VER >= 14
{
// This is LWG #2059
typedef TemplateConstructor T;
typedef std::set<T> C;
typedef C::iterator I;
C c;
T a{0};
I it = c.find(a);
if (it != c.end())
c.erase(it);
}
#endif
return 0;
}