38 lines · 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-exception6//7//===----------------------------------------------------------------------===//8 9// <unordered_set>10 11// template <class Value, class Hash = hash<Value>, class Pred = equal_to<Value>,12// class Alloc = allocator<Value>>13// class unordered_set14 15// key_equal key_eq() const;16 17#include <unordered_set>18#include <cassert>19 20int main(int, char**) {21 typedef std::unordered_set<int> set_type;22 23 set_type s;24 25 std::pair<set_type::iterator, bool> p1 = s.insert(1);26 std::pair<set_type::iterator, bool> p2 = s.insert(2);27 28 const set_type& cs = s;29 30 assert(cs.key_eq()(*p1.first, *p1.first));31 assert(cs.key_eq()(*p2.first, *p2.first));32 33 assert(!cs.key_eq()(*p1.first, *p2.first));34 assert(!cs.key_eq()(*p2.first, *p1.first));35 36 return 0;37}38