1 // Copyright 2020 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef INCLUDE_CPPGC_EPHEMERON_PAIR_H_ 6 #define INCLUDE_CPPGC_EPHEMERON_PAIR_H_ 7 8 #include "cppgc/member.h" 9 10 namespace cppgc { 11 12 /** 13 * An ephemeron pair is used to conditionally retain an object. 14 * The `value` will be kept alive only if the `key` is alive. 15 */ 16 template <typename K, typename V> 17 struct EphemeronPair { EphemeronPairEphemeronPair18 EphemeronPair(K* k, V* v) : key(k), value(v) {} 19 WeakMember<K> key; 20 Member<V> value; 21 }; 22 23 } // namespace cppgc 24 25 #endif // INCLUDE_CPPGC_EPHEMERON_PAIR_H_ 26