b64f8b07c1
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@119395 91177308-0d34-0410-b5e6-96231b3b80d8
88 lines
2.5 KiB
C++
88 lines
2.5 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <unordered_map>
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// template <class Key, class T, class Hash = hash<Key>, class Pred = equal_to<Key>,
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// class Alloc = allocator<pair<const Key, T>>>
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// class unordered_multimap
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// void rehash(size_type n);
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#include <unordered_map>
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#include <string>
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#include <cassert>
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void test(const std::unordered_multimap<int, std::string>& c)
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{
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typedef std::unordered_multimap<int, std::string> C;
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assert(c.size() == 6);
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typedef std::pair<C::const_iterator, C::const_iterator> Eq;
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Eq eq = c.equal_range(1);
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assert(std::distance(eq.first, eq.second) == 2);
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C::const_iterator i = eq.first;
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assert(i->first == 1);
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assert(i->second == "one");
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++i;
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assert(i->first == 1);
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assert(i->second == "four");
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eq = c.equal_range(2);
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assert(std::distance(eq.first, eq.second) == 2);
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i = eq.first;
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assert(i->first == 2);
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assert(i->second == "two");
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++i;
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assert(i->first == 2);
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assert(i->second == "four");
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eq = c.equal_range(3);
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assert(std::distance(eq.first, eq.second) == 1);
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i = eq.first;
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assert(i->first == 3);
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assert(i->second == "three");
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eq = c.equal_range(4);
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assert(std::distance(eq.first, eq.second) == 1);
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i = eq.first;
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assert(i->first == 4);
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assert(i->second == "four");
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assert(std::distance(c.begin(), c.end()) == c.size());
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assert(std::distance(c.cbegin(), c.cend()) == c.size());
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assert(c.load_factor() == (float)c.size()/c.bucket_count());
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}
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int main()
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{
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{
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typedef std::unordered_multimap<int, std::string> C;
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typedef std::pair<int, std::string> P;
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P a[] =
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{
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P(1, "one"),
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P(2, "two"),
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P(3, "three"),
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P(4, "four"),
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P(1, "four"),
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P(2, "four"),
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};
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C c(a, a + sizeof(a)/sizeof(a[0]));
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test(c);
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assert(c.bucket_count() >= 7);
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c.rehash(3);
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assert(c.bucket_count() == 7);
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test(c);
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c.max_load_factor(2);
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c.rehash(3);
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assert(c.bucket_count() == 3);
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test(c);
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c.rehash(31);
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assert(c.bucket_count() == 31);
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test(c);
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}
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}
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