merge.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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03, c++11, c++14
// <map>
// class multimap
// template <class C2>
// void merge(map<key_type, value_type, C2, allocator_type>& source);
// template <class C2>
// void merge(map<key_type, value_type, C2, allocator_type>&& source);
// template <class C2>
// void merge(multimap<key_type, value_type, C2, allocator_type>& source);
// template <class C2>
// void merge(multimap<key_type, value_type, C2, allocator_type>&& source);
#include <map>
#include <cassert>
#include "test_macros.h"
#include "Counter.h"
template <class Map>
bool map_equal(const Map& map, Map other)
{
return map == other;
}
#ifndef TEST_HAS_NO_EXCEPTIONS
struct throw_comparator
{
bool& should_throw_;
throw_comparator(bool& should_throw) : should_throw_(should_throw) {}
template <class T>
bool operator()(const T& lhs, const T& rhs) const
{
if (should_throw_)
throw 0;
return lhs < rhs;
}
};
#endif
int main(int, char**)
{
{
std::multimap<int, int> src{{1, 0}, {3, 0}, {5, 0}};
std::multimap<int, int> dst{{2, 0}, {4, 0}, {5, 0}};
dst.merge(src);
assert(map_equal(src, {}));
assert(map_equal(dst, {{1, 0}, {2, 0}, {3, 0}, {4, 0}, {5, 0}, {5, 0}}));
}
#ifndef TEST_HAS_NO_EXCEPTIONS
{
bool do_throw = false;
typedef std::multimap<Counter<int>, int, throw_comparator> map_type;
map_type src({{1, 0}, {3, 0}, {5, 0}}, throw_comparator(do_throw));
map_type dst({{2, 0}, {4, 0}, {5, 0}}, throw_comparator(do_throw));
assert(Counter_base::gConstructed == 6);
do_throw = true;
try
{
dst.merge(src);
}
catch (int)
{
do_throw = false;
}
assert(!do_throw);
assert(map_equal(src, map_type({{1, 0}, {3, 0}, {5, 0}}, throw_comparator(do_throw))));
assert(map_equal(dst, map_type({{2, 0}, {4, 0}, {5, 0}}, throw_comparator(do_throw))));
}
#endif
assert(Counter_base::gConstructed == 0);
struct comparator
{
comparator() = default;
bool operator()(const Counter<int>& lhs, const Counter<int>& rhs) const
{
return lhs < rhs;
}
};
{
typedef std::multimap<Counter<int>, int, std::less<Counter<int>>> first_map_type;
typedef std::multimap<Counter<int>, int, comparator> second_map_type;
typedef std::map<Counter<int>, int, comparator> third_map_type;
{
first_map_type first{{1, 0}, {2, 0}, {3, 0}};
second_map_type second{{2, 0}, {3, 0}, {4, 0}};
third_map_type third{{1, 0}, {3, 0}};
assert(Counter_base::gConstructed == 8);
first.merge(second);
first.merge(third);
assert(map_equal(first, {{1, 0}, {1, 0}, {2, 0}, {2, 0}, {3, 0}, {3, 0}, {3, 0}, {4, 0}}));
assert(map_equal(second, {}));
assert(map_equal(third, {}));
assert(Counter_base::gConstructed == 8);
}
assert(Counter_base::gConstructed == 0);
{
first_map_type first{{1, 0}, {2, 0}, {3, 0}};
second_map_type second{{2, 0}, {3, 0}, {4, 0}};
third_map_type third{{1, 0}, {3, 0}};
assert(Counter_base::gConstructed == 8);
first.merge(std::move(second));
first.merge(std::move(third));
assert(map_equal(first, {{1, 0}, {1, 0}, {2, 0}, {2, 0}, {3, 0}, {3, 0}, {3, 0}, {4, 0}}));
assert(map_equal(second, {}));
assert(map_equal(third, {}));
assert(Counter_base::gConstructed == 8);
}
assert(Counter_base::gConstructed == 0);
}
assert(Counter_base::gConstructed == 0);
{
std::multimap<int, int> first;
{
std::multimap<int, int> second;
first.merge(second);
first.merge(std::move(second));
}
{
std::multimap<int, int> second;
first.merge(second);
first.merge(std::move(second));
}
}
return 0;
}