| // Copyright 2014 The Bazel Authors. All rights reserved. |
| // |
| // 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 com.google.devtools.build.lib.syntax; |
| |
| import javax.annotation.Nullable; |
| |
| /** A syntax node for return statements. */ |
| public final class ReturnStatement extends Statement { |
| |
| private final int returnOffset; |
| @Nullable private final Expression result; |
| |
| ReturnStatement(FileLocations locs, int returnOffset, @Nullable Expression result) { |
| super(locs); |
| this.returnOffset = returnOffset; |
| this.result = result; |
| } |
| |
| /** |
| * Returns a new return statement that returns expr. It has a dummy file offset and line number |
| * table. It is provided only for use by the evaluator, and will be removed when it switches to a |
| * compiled representation. |
| */ |
| static ReturnStatement make(Expression expr) { |
| return new ReturnStatement(expr.locs, 0, expr); |
| } |
| |
| @Nullable |
| public Expression getResult() { |
| return result; |
| } |
| |
| @Override |
| public int getStartOffset() { |
| return returnOffset; |
| } |
| |
| @Override |
| public int getEndOffset() { |
| return result != null ? result.getEndOffset() : returnOffset + "return".length(); |
| } |
| |
| @Override |
| public void accept(NodeVisitor visitor) { |
| visitor.visit(this); |
| } |
| |
| @Override |
| public Kind kind() { |
| return Kind.RETURN; |
| } |
| } |