| // 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; |
| |
| /** Syntax node for a slice expression, e.g. obj[:len(obj):2]. */ |
| public final class SliceExpression extends Expression { |
| |
| private final Expression object; |
| @Nullable private final Expression start; |
| @Nullable private final Expression end; |
| @Nullable private final Expression step; |
| |
| SliceExpression(Expression object, Expression start, Expression end, Expression step) { |
| this.object = object; |
| this.start = start; |
| this.end = end; |
| this.step = step; |
| } |
| |
| public Expression getObject() { |
| return object; |
| } |
| |
| public @Nullable Expression getStart() { |
| return start; |
| } |
| |
| public @Nullable Expression getEnd() { |
| return end; |
| } |
| |
| public @Nullable Expression getStep() { |
| return step; |
| } |
| |
| @Override |
| public void accept(NodeVisitor visitor) { |
| visitor.visit(this); |
| } |
| |
| @Override |
| public Kind kind() { |
| return Kind.SLICE; |
| } |
| } |