| /* |
| * Copyright 2016 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.idea.blaze.base.lang.buildfile.lexer; |
| |
| /** |
| * A Token represents an actual lexeme; that is, a lexical unit, its location in |
| * the input text, its lexical kind, and any associated value. |
| */ |
| public class Token { |
| |
| public final TokenKind kind; |
| public final int left; |
| public final int right; |
| public final Object value; |
| |
| public Token(TokenKind kind, int left, int right) { |
| this(kind, left, right, null); |
| } |
| |
| public Token(TokenKind kind, int left, int right, Object value) { |
| this.kind = kind; |
| this.left = left; |
| this.right = right; |
| this.value = value; |
| } |
| |
| /** |
| * Constructs an easy-to-read string representation of token, suitable for use |
| * in user error messages. |
| */ |
| @Override |
| public String toString() { |
| if (kind == TokenKind.STRING) { |
| return "\"" + value + "\""; |
| } |
| return value == null ? kind.toString() : value.toString(); |
| } |
| |
| } |
| |