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

   1
   2 //===----------------------------------------------------------------------===//
   3 //
   4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   5 // See https://llvm.org/LICENSE.txt for license information.
   6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 // <unordered_map>
  11
  12 // Check that std::unordered_multimap and its iterators can be instantiated with an incomplete
  13 // type.
  14
  15 #include <unordered_map>
  16
  17 #include "test_macros.h"
  18
  19 template <class Tp>
  20 struct MyHash {
  21   MyHash() {}
  22   std::size_t operator()(Tp const&) const {return 42;}
  23 };
  24
  25 struct A {
  26     typedef std::unordered_multimap<A, A, MyHash<A> > Map;
  27     Map m;
  28     Map::iterator it;
  29     Map::const_iterator cit;
  30     Map::local_iterator lit;
  31     Map::const_local_iterator clit;
  32 };
  33
  34 inline bool operator==(A const& L, A const& R) { return &L == &R; }
  35
  36 int main(int, char**) {
  37     A a;
  38
  39   return 0;
  40 }