You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
109 lines
2.5 KiB
C++
109 lines
2.5 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// <unordered_set>
|
|
|
|
// template <class Value, class Hash = hash<Value>, class Pred = equal_to<Value>,
|
|
// class Alloc = allocator<Value>>
|
|
// class unordered_multiset
|
|
|
|
// void reserve(size_type n);
|
|
|
|
#include <unordered_set>
|
|
#include <cassert>
|
|
|
|
#include "test_macros.h"
|
|
#include "min_allocator.h"
|
|
|
|
template <class C>
|
|
void test(const C& c)
|
|
{
|
|
assert(c.size() == 6);
|
|
assert(c.count(1) == 2);
|
|
assert(c.count(2) == 2);
|
|
assert(c.count(3) == 1);
|
|
assert(c.count(4) == 1);
|
|
}
|
|
|
|
void reserve_invariant(size_t n) // LWG #2156
|
|
{
|
|
for (size_t i = 0; i < n; ++i)
|
|
{
|
|
std::unordered_multiset<size_t> c;
|
|
c.reserve(n);
|
|
size_t buckets = c.bucket_count();
|
|
for (size_t j = 0; j < i; ++j)
|
|
{
|
|
c.insert(i);
|
|
assert(buckets == c.bucket_count());
|
|
}
|
|
}
|
|
}
|
|
|
|
int main(int, char**)
|
|
{
|
|
{
|
|
typedef std::unordered_multiset<int> C;
|
|
typedef int P;
|
|
P a[] =
|
|
{
|
|
P(1),
|
|
P(2),
|
|
P(3),
|
|
P(4),
|
|
P(1),
|
|
P(2)
|
|
};
|
|
C c(a, a + sizeof(a)/sizeof(a[0]));
|
|
test(c);
|
|
assert(c.bucket_count() >= 7);
|
|
c.reserve(3);
|
|
LIBCPP_ASSERT(c.bucket_count() == 7);
|
|
test(c);
|
|
c.max_load_factor(2);
|
|
c.reserve(3);
|
|
LIBCPP_ASSERT(c.bucket_count() == 3);
|
|
test(c);
|
|
c.reserve(31);
|
|
assert(c.bucket_count() >= 16);
|
|
test(c);
|
|
}
|
|
#if TEST_STD_VER >= 11
|
|
{
|
|
typedef std::unordered_multiset<int, std::hash<int>,
|
|
std::equal_to<int>, min_allocator<int>> C;
|
|
typedef int P;
|
|
P a[] =
|
|
{
|
|
P(1),
|
|
P(2),
|
|
P(3),
|
|
P(4),
|
|
P(1),
|
|
P(2)
|
|
};
|
|
C c(a, a + sizeof(a)/sizeof(a[0]));
|
|
test(c);
|
|
assert(c.bucket_count() >= 7);
|
|
c.reserve(3);
|
|
LIBCPP_ASSERT(c.bucket_count() == 7);
|
|
test(c);
|
|
c.max_load_factor(2);
|
|
c.reserve(3);
|
|
LIBCPP_ASSERT(c.bucket_count() == 3);
|
|
test(c);
|
|
c.reserve(31);
|
|
assert(c.bucket_count() >= 16);
|
|
test(c);
|
|
}
|
|
#endif
|
|
reserve_invariant(20);
|
|
|
|
return 0;
|
|
}
|