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// { dg-options "-std=gnu++20" }
// { dg-do compile { target c++20 } }
// { dg-xfail-if "not supported" { debug_mode } }
#include <vector>
#include <testsuite_hooks.h>
template<typename T>
struct Alloc : std::allocator<T>
{
using std::allocator<T>::allocator;
constexpr explicit Alloc(int p) : personality(p) { }
template<typename U>
constexpr Alloc(const Alloc<U>& a) : personality(a.personality) { }
int personality = 0;
using propagate_on_container_move_assignment = std::false_type;
constexpr bool operator==(const Alloc& a) const noexcept
{ return personality == a.personality; }
};
constexpr bool
copy_assign()
{
// vector::operator=(const vector&)
std::vector<int> v1, v2;
v1 = v1;
v2 = v1;
VERIFY(v2.size() == 0);
VERIFY(v2.capacity() == 0);
for (int i = 0; i < 10; ++i)
v1.push_back(i);
v2 = v1;
VERIFY(v2.size() == 10);
v2.reserve(50);
v1.push_back(1);
v2 = v1;
VERIFY(v2.size() == 11);
VERIFY(v2.capacity() == 50);
std::vector<int, Alloc<int>> va1(Alloc<int>(1)), va2(Alloc<int>(2));
va2 = va1;
VERIFY( va2.get_allocator().personality == 2 );
va1.push_back(999);
va2 = va1;
VERIFY( va2.get_allocator().personality == 2 );
return true;
}
static_assert( copy_assign() );
constexpr bool
move_assign()
{
// vector::operator=(const vector&)
std::vector<int> v1, v2;
v1 = std::move(v1);
v2 = std::move(v1);
VERIFY(v2.size() == 0);
VERIFY(v2.capacity() == 0);
for (int i = 0; i < 10; ++i)
v1.push_back(i);
v2 = std::move(v1);
VERIFY(v2.size() == 10);
v2.reserve(50);
v1.push_back(1);
v2 = std::move(v1);
VERIFY(v2.size() == 1);
VERIFY(v1.capacity() == 0);
VERIFY(v2.capacity() == 1);
std::vector<int, Alloc<int>> va1(Alloc<int>(1)), va2(Alloc<int>(2));
va2 = std::move(va1);
VERIFY( va2.get_allocator().personality == 2 );
va1.push_back(9);
va1.push_back(99);
va1.push_back(999);
va1.push_back(9999);
va2 = std::move(va1);
va2 = std::move(va1);
VERIFY( va2.get_allocator().personality == 2 );
return true;
}
static_assert( move_assign() );
constexpr bool
initializer_list_assign()
{
std::vector<int> v1;
v1 = {1, 2, 3};
VERIFY( v1.size() == 3 );
VERIFY( v1.capacity() == 3 );
v1 = {1, 2};
VERIFY( v1.size() == 2 );
VERIFY( v1.capacity() == 3 );
v1 = {1, 2, 3, 4, 5, 6, 7, 8, 9};
VERIFY( v1.size() == 9 );
VERIFY( v1.capacity() == 9 );
std::vector<int, Alloc<int>> va1(Alloc<int>(111));
va1 = {1, 2, 3};
VERIFY( va1.get_allocator().personality == 111 );
return true;
}
static_assert( initializer_list_assign() );
constexpr bool
assign_iterator_range()
{
std::vector<int> v;
int arr[] = { 1, 2, 3, 4 };
v.assign(arr, arr+3);
VERIFY( v.size() == 3 );
v.reserve(5);
v.assign(arr, arr+3);
VERIFY( v.capacity() == 5 );
struct input_iterator
{
using iterator_category = std::input_iterator_tag;
using value_type = int;
using pointer = const int*;
using reference = int;
using difference_type = int;
constexpr input_iterator() : val(0) { }
constexpr input_iterator(int i) : val(i) { }
constexpr input_iterator& operator++() { --val; return *this; }
constexpr input_iterator operator++(int) { return {val--}; }
constexpr int operator*() const { return val; }
constexpr const int* operator->() const { return &val; }
constexpr bool operator==(const input_iterator&) const = default;
int val;
};
v.assign(input_iterator(9), input_iterator());
VERIFY( v.size() == 9 );
return true;
}
static_assert( assign_iterator_range() );
constexpr bool
assign_value()
{
std::vector<int> v1;
v1.assign(3, 8);
VERIFY( v1.size() == 3 );
VERIFY( v1.capacity() == 3 );
v1.assign(2, 9);
VERIFY( v1.size() == 2 );
VERIFY( v1.capacity() == 3 );
v1.assign(9, 10);
VERIFY( v1.size() == 9 );
VERIFY( v1.capacity() == 9 );
std::vector<int, Alloc<int>> va1(Alloc<int>(111));
va1.assign(2, 9);
VERIFY( va1.size() == 2 );
VERIFY( va1.get_allocator().personality == 111 );
return true;
}
static_assert( assign_value() );
constexpr bool
assign_initializer_list()
{
std::vector<int> v1;
v1.assign({1, 2, 3});
VERIFY( v1.size() == 3 );
VERIFY( v1.capacity() == 3 );
v1.assign({1, 2});
VERIFY( v1.size() == 2 );
VERIFY( v1.capacity() == 3 );
v1.assign({1, 2, 3, 4, 5, 6, 7, 8, 9});
VERIFY( v1.size() == 9 );
VERIFY( v1.capacity() == 9 );
std::vector<int, Alloc<int>> va1(Alloc<int>(111));
va1.assign({1, 2, 3});
VERIFY( va1.get_allocator().personality == 111 );
return true;
}
static_assert( assign_initializer_list() );
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