| // Copyright (C) 2015 The Android Open Source Project |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package atom |
| |
| // IDSet is a set of IDs. |
| type IDSet map[ID]struct{} |
| |
| // Remove removes id from the set. If the id was not in the set then the call |
| // does nothing. |
| func (s *IDSet) Remove(id ID) { |
| delete(*s, id) |
| } |
| |
| // Add adds id to the set. If the id was already in the set then the call does |
| // nothing. |
| func (s *IDSet) Add(id ID) { |
| (*s)[id] = struct{}{} |
| } |
| |
| // Contains returns true if id is in the set, otherwise false. |
| func (s IDSet) Contains(id ID) bool { |
| _, ok := s[id] |
| return ok |
| } |