llvm/libcxx/test/std/containers/unord/unord.map/unord.map.cnstr/size_hash_equal_allocator.pass.cpp

//===----------------------------------------------------------------------===//
//
// 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_map>

// template <class Key, class T, class Hash = hash<Key>, class Pred = equal_to<Key>,
//           class Alloc = allocator<pair<const Key, T>>>
// class unordered_map

// unordered_map(size_type n, const hasher& hf, const key_equal& eql, const allocator_type& a);

#include <unordered_map>
#include <cassert>

#include "test_macros.h"
#include "../../../NotConstructible.h"
#include "../../../test_compare.h"
#include "../../../test_hash.h"
#include "test_allocator.h"
#include "min_allocator.h"

int main(int, char**)
{
    {
        typedef std::unordered_map<NotConstructible, NotConstructible,
                                   test_hash<NotConstructible>,
                                   test_equal_to<NotConstructible>,
                                   test_allocator<std::pair<const NotConstructible,
                                                                  NotConstructible> >
                                   > C;
        C c(7,
            test_hash<NotConstructible>(8),
            test_equal_to<NotConstructible>(9),
            test_allocator<std::pair<const NotConstructible, NotConstructible> >(10)
           );
        LIBCPP_ASSERT(c.bucket_count() == 7);
        assert(c.hash_function() == test_hash<NotConstructible>(8));
        assert(c.key_eq() == test_equal_to<NotConstructible>(9));
        assert(c.get_allocator() ==
               (test_allocator<std::pair<const NotConstructible, NotConstructible> >(10)));
        assert(c.size() == 0);
        assert(c.empty());
        assert(std::distance(c.begin(), c.end()) == 0);
        assert(c.load_factor() == 0);
        assert(c.max_load_factor() == 1);
    }
#if TEST_STD_VER >= 11
    {
        typedef std::unordered_map<NotConstructible, NotConstructible,
                                   test_hash<NotConstructible>,
                                   test_equal_to<NotConstructible>,
                                   min_allocator<std::pair<const NotConstructible,
                                                                 NotConstructible> >
                                   > C;
        C c(7,
            test_hash<NotConstructible>(8),
            test_equal_to<NotConstructible>(9),
            min_allocator<std::pair<const NotConstructible, NotConstructible> >()
           );
        LIBCPP_ASSERT(c.bucket_count() == 7);
        assert(c.hash_function() == test_hash<NotConstructible>(8));
        assert(c.key_eq() == test_equal_to<NotConstructible>(9));
        assert(c.get_allocator() ==
               (min_allocator<std::pair<const NotConstructible, NotConstructible> >()));
        assert(c.size() == 0);
        assert(c.empty());
        assert(std::distance(c.begin(), c.end()) == 0);
        assert(c.load_factor() == 0);
        assert(c.max_load_factor() == 1);
    }
    {
        typedef explicit_allocator<std::pair<const NotConstructible, NotConstructible> > A;
        typedef std::unordered_map<NotConstructible, NotConstructible,
                                   test_hash<NotConstructible>,
                                   test_equal_to<NotConstructible>,
                                   A
                                   > C;
        C c(7,
            test_hash<NotConstructible>(8),
            test_equal_to<NotConstructible>(9),
            A{}
           );
        LIBCPP_ASSERT(c.bucket_count() == 7);
        assert(c.hash_function() == test_hash<NotConstructible>(8));
        assert(c.key_eq() == test_equal_to<NotConstructible>(9));
        assert(c.get_allocator() == A{});
        assert(c.size() == 0);
        assert(c.empty());
        assert(std::distance(c.begin(), c.end()) == 0);
        assert(c.load_factor() == 0);
        assert(c.max_load_factor() == 1);
    }
#endif

  return 0;
}