| // Copyright (c) 2019, the R8 project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| package com.android.tools.r8.ir.analysis.fieldvalueanalysis; |
| |
| import com.android.tools.r8.graph.DexEncodedField; |
| |
| public class EmptyFieldSet extends AbstractFieldSet implements KnownFieldSet { |
| |
| private static final EmptyFieldSet INSTANCE = new EmptyFieldSet(); |
| |
| private EmptyFieldSet() {} |
| |
| public static EmptyFieldSet getInstance() { |
| return INSTANCE; |
| } |
| |
| @Override |
| public boolean isKnownFieldSet() { |
| return true; |
| } |
| |
| @Override |
| public EmptyFieldSet asKnownFieldSet() { |
| return this; |
| } |
| |
| @Override |
| public boolean contains(DexEncodedField field) { |
| return false; |
| } |
| |
| @Override |
| public boolean isBottom() { |
| return true; |
| } |
| |
| @Override |
| public int size() { |
| return 0; |
| } |
| } |