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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
//
//===----------------------------------------------------------------------===//
// <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_multimap
// iterator erase(const_iterator p)
#include <unordered_map>
#include <string>
#include <set>
#include <cassert>
#include <cstddef>
#include "test_macros.h"
#include "../../../check_consecutive.h"
#include "min_allocator.h"
struct TemplateConstructor
{
template<typename T>
TemplateConstructor (const T&) {}
};
bool operator==(const TemplateConstructor&, const TemplateConstructor&) { return false; }
struct Hash { size_t operator() (const TemplateConstructor &) const { return 0; } };
int main(int, char**)
{
{
typedef std::unordered_multimap<int, std::string> C;
typedef std::pair<int, std::string> P;
P a[] =
{
P(1, "one"),
P(2, "two"),
P(3, "three"),
P(4, "four"),
P(1, "four"),
P(2, "four"),
};
C c(a, a + sizeof(a)/sizeof(a[0]));
C::const_iterator i = c.find(2);
C::const_iterator i_next = i;
++i_next;
std::string es = i->second;
C::iterator j = c.erase(i);
assert(j == i_next);
assert(c.size() == 5);
typedef std::pair<C::const_iterator, C::const_iterator> Eq;
Eq eq = c.equal_range(1);
assert(std::distance(eq.first, eq.second) == 2);
std::multiset<std::string> s;
s.insert("one");
s.insert("four");
CheckConsecutiveKeys<C::const_iterator>(c.find(1), c.end(), 1, s);
eq = c.equal_range(2);
assert(std::distance(eq.first, eq.second) == 1);
C::const_iterator k = eq.first;
assert(k->first == 2);
assert(k->second == (es == "two" ? "four" : "two"));
eq = c.equal_range(3);
assert(std::distance(eq.first, eq.second) == 1);
k = eq.first;
assert(k->first == 3);
assert(k->second == "three");
eq = c.equal_range(4);
assert(std::distance(eq.first, eq.second) == 1);
k = eq.first;
assert(k->first == 4);
assert(k->second == "four");
assert(static_cast<std::size_t>(std::distance(c.begin(), c.end())) == c.size());
assert(static_cast<std::size_t>(std::distance(c.cbegin(), c.cend())) == c.size());
}
#if TEST_STD_VER >= 11
{
typedef std::unordered_multimap<int, std::string, std::hash<int>, std::equal_to<int>,
min_allocator<std::pair<const int, std::string>>> C;
typedef std::pair<int, std::string> P;
P a[] =
{
P(1, "one"),
P(2, "two"),
P(3, "three"),
P(4, "four"),
P(1, "four"),
P(2, "four"),
};
C c(a, a + sizeof(a)/sizeof(a[0]));
C::const_iterator i = c.find(2);
C::const_iterator i_next = i;
++i_next;
std::string es = i->second;
C::iterator j = c.erase(i);
assert(j == i_next);
assert(c.size() == 5);
typedef std::pair<C::const_iterator, C::const_iterator> Eq;
Eq eq = c.equal_range(1);
assert(std::distance(eq.first, eq.second) == 2);
std::multiset<std::string> s;
s.insert("one");
s.insert("four");
CheckConsecutiveKeys<C::const_iterator>(c.find(1), c.end(), 1, s);
eq = c.equal_range(2);
assert(std::distance(eq.first, eq.second) == 1);
C::const_iterator k = eq.first;
assert(k->first == 2);
assert(k->second == (es == "two" ? "four" : "two"));
eq = c.equal_range(3);
assert(std::distance(eq.first, eq.second) == 1);
k = eq.first;
assert(k->first == 3);
assert(k->second == "three");
eq = c.equal_range(4);
assert(std::distance(eq.first, eq.second) == 1);
k = eq.first;
assert(k->first == 4);
assert(k->second == "four");
assert(static_cast<std::size_t>(std::distance(c.begin(), c.end())) == c.size());
assert(static_cast<std::size_t>(std::distance(c.cbegin(), c.cend())) == c.size());
}
#endif
#if TEST_STD_VER >= 14
{
// This is LWG #2059
typedef TemplateConstructor T;
typedef std::unordered_multimap<T, int, Hash> C;
typedef C::iterator I;
C m;
T a{0};
I it = m.find(a);
if (it != m.end())
m.erase(it);
}
#endif
return 0;
}