libcxx/test/std/containers/unord/unord.multimap/key_eq.pass.cpp

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 // <unordered_map>
  10
  11 // template <class Key, class T, class Hash = hash<Key>, class Pred = equal_to<Key>,
  12 //           class Alloc = allocator<pair<const Key, T>>>
  13 // class unordered_multimap
  14
  15 // hasher key_eq() const;
  16
  17 #include <unordered_map>
  18 #include <string>
  19 #include <cassert>
  20
  21 #include "test_macros.h"
  22
  23 int main(int, char**) {
  24   typedef std::unordered_multimap<int, std::string> map_type;
  25
  26   map_type m;
  27   map_type::iterator i1 = m.insert(map_type::value_type(1, "abc"));
  28   map_type::iterator i2 = m.insert(map_type::value_type(1, "bcd"));
  29   map_type::iterator i3 = m.insert(map_type::value_type(2, "abc"));
  30
  31   const map_type& cm = m;
  32
  33   assert(cm.key_eq()(i1->first, i1->first));
  34   assert(cm.key_eq()(i2->first, i2->first));
  35   assert(cm.key_eq()(i3->first, i3->first));
  36
  37   assert(cm.key_eq()(i1->first, i2->first));
  38   assert(cm.key_eq()(i2->first, i1->first));
  39
  40   assert(!cm.key_eq()(i1->first, i3->first));
  41   assert(!cm.key_eq()(i3->first, i1->first));
  42
  43   assert(!cm.key_eq()(i2->first, i3->first));
  44   assert(!cm.key_eq()(i3->first, i2->first));
  45
  46   return 0;
  47 }