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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
//
//===----------------------------------------------------------------------===//
// <vector>
// iterator erase(const_iterator position);
#include <vector>
#include <iterator>
#include <cassert>
#include "asan_testing.h"
#include "min_allocator.h"
#include "MoveOnly.h"
#include "test_macros.h"
#ifndef TEST_HAS_NO_EXCEPTIONS
struct Throws {
Throws() : v_(0) {}
Throws(int v) : v_(v) {}
Throws(const Throws& rhs) : v_(rhs.v_) {
if (sThrows)
throw 1;
}
Throws(Throws&& rhs) : v_(rhs.v_) {
if (sThrows)
throw 1;
}
Throws& operator=(const Throws& rhs) {
v_ = rhs.v_;
return *this;
}
Throws& operator=(Throws&& rhs) {
v_ = rhs.v_;
return *this;
}
int v_;
static bool sThrows;
};
bool Throws::sThrows = false;
#endif
TEST_CONSTEXPR_CXX20 bool tests() {
{
int a1[] = {1, 2, 3, 4, 5};
std::vector<int> l1(a1, a1 + 5);
l1.erase(l1.begin());
assert(is_contiguous_container_asan_correct(l1));
assert(l1 == std::vector<int>(a1 + 1, a1 + 5));
}
{
int a1[] = {1, 2, 3, 4, 5};
int e1[] = {1, 3, 4, 5};
std::vector<int> l1(a1, a1 + 5);
l1.erase(l1.begin() + 1);
assert(is_contiguous_container_asan_correct(l1));
assert(l1 == std::vector<int>(e1, e1 + 4));
}
{
int a1[] = {1, 2, 3};
std::vector<int> l1(a1, a1 + 3);
std::vector<int>::const_iterator i = l1.begin();
assert(is_contiguous_container_asan_correct(l1));
++i;
std::vector<int>::iterator j = l1.erase(i);
assert(l1.size() == 2);
assert(std::distance(l1.begin(), l1.end()) == 2);
assert(*j == 3);
assert(*l1.begin() == 1);
assert(*std::next(l1.begin()) == 3);
assert(is_contiguous_container_asan_correct(l1));
j = l1.erase(j);
assert(j == l1.end());
assert(l1.size() == 1);
assert(std::distance(l1.begin(), l1.end()) == 1);
assert(*l1.begin() == 1);
assert(is_contiguous_container_asan_correct(l1));
j = l1.erase(l1.begin());
assert(j == l1.end());
assert(l1.size() == 0);
assert(std::distance(l1.begin(), l1.end()) == 0);
assert(is_contiguous_container_asan_correct(l1));
}
// Make sure vector::erase works with move-only types
// When non-trivial
{
std::vector<MoveOnly> v;
v.emplace_back(1);
v.emplace_back(2);
v.emplace_back(3);
v.erase(v.begin());
assert(v.size() == 2);
assert(v[0] == MoveOnly(2));
assert(v[1] == MoveOnly(3));
}
// When trivial
{
std::vector<TrivialMoveOnly> v;
v.emplace_back(1);
v.emplace_back(2);
v.emplace_back(3);
v.erase(v.begin());
assert(v.size() == 2);
assert(v[0] == TrivialMoveOnly(2));
assert(v[1] == TrivialMoveOnly(3));
}
#if TEST_STD_VER >= 11
{
int a1[] = {1, 2, 3};
std::vector<int, min_allocator<int>> l1(a1, a1 + 3);
std::vector<int, min_allocator<int>>::const_iterator i = l1.begin();
assert(is_contiguous_container_asan_correct(l1));
++i;
std::vector<int, min_allocator<int>>::iterator j = l1.erase(i);
assert(l1.size() == 2);
assert(std::distance(l1.begin(), l1.end()) == 2);
assert(*j == 3);
assert(*l1.begin() == 1);
assert(*std::next(l1.begin()) == 3);
assert(is_contiguous_container_asan_correct(l1));
j = l1.erase(j);
assert(j == l1.end());
assert(l1.size() == 1);
assert(std::distance(l1.begin(), l1.end()) == 1);
assert(*l1.begin() == 1);
assert(is_contiguous_container_asan_correct(l1));
j = l1.erase(l1.begin());
assert(j == l1.end());
assert(l1.size() == 0);
assert(std::distance(l1.begin(), l1.end()) == 0);
assert(is_contiguous_container_asan_correct(l1));
}
#endif
return true;
}
int main(int, char**) {
tests();
#if TEST_STD_VER > 17
static_assert(tests());
#endif
#ifndef TEST_HAS_NO_EXCEPTIONS
// Test for LWG2853:
// Throws: Nothing unless an exception is thrown by the assignment operator or move assignment operator of T.
{
Throws arr[] = {1, 2, 3};
std::vector<Throws> v(arr, arr + 3);
Throws::sThrows = true;
v.erase(v.begin());
v.erase(--v.end());
v.erase(v.begin());
assert(v.size() == 0);
}
#endif
return 0;
}
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