212 lines
7.0 KiB
Plaintext
212 lines
7.0 KiB
Plaintext
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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/* Generated By:JavaCC: Do not edit this line. ParseException.java Version 0.7pre6 */
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package Mini;
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/**
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* This exception is thrown when parse errors are encountered.
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* You can explicitly create objects of this exception type by
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* calling the method generateParseException in the generated
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* parser.
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*
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* You can modify this class to customize your error reporting
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* mechanisms so long as you retain the public fields.
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*/
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public class ParseException extends Exception {
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/**
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* This constructor is used by the method "generateParseException"
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* in the generated parser. Calling this constructor generates
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* a new object of this type with the fields "currentToken",
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* "expectedTokenSequences", and "tokenImage" set. The boolean
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* flag "specialConstructor" is also set to true to indicate that
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* this constructor was used to create this object.
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* This constructor calls its super class with the empty string
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* to force the "toString" method of parent class "Throwable" to
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* print the error message in the form:
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* ParseException: <result of getMessage>
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*/
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public ParseException(Token currentTokenVal,
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int[][] expectedTokenSequencesVal,
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String[] tokenImageVal
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)
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{
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super("");
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specialConstructor = true;
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currentToken = currentTokenVal;
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expectedTokenSequences = expectedTokenSequencesVal;
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tokenImage = tokenImageVal;
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}
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/**
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* The following constructors are for use by you for whatever
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* purpose you can think of. Constructing the exception in this
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* manner makes the exception behave in the normal way - i.e., as
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* documented in the class "Throwable". The fields "errorToken",
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* "expectedTokenSequences", and "tokenImage" do not contain
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* relevant information. The JavaCC generated code does not use
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* these constructors.
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*/
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public ParseException() {
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super();
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specialConstructor = false;
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}
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public ParseException(String message) {
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super(message);
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specialConstructor = false;
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}
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/**
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* This variable determines which constructor was used to create
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* this object and thereby affects the semantics of the
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* "getMessage" method (see below).
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*/
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protected boolean specialConstructor;
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/**
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* This is the last token that has been consumed successfully. If
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* this object has been created due to a parse error, the token
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* followng this token will (therefore) be the first error token.
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*/
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public Token currentToken;
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/**
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* Each entry in this array is an array of integers. Each array
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* of integers represents a sequence of tokens (by their ordinal
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* values) that is expected at this point of the parse.
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*/
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public int[][] expectedTokenSequences;
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/**
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* This is a reference to the "tokenImage" array of the generated
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* parser within which the parse error occurred. This array is
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* defined in the generated ...Constants interface.
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*/
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public String[] tokenImage;
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/**
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* This method has the standard behavior when this object has been
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* created using the standard constructors. Otherwise, it uses
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* "currentToken" and "expectedTokenSequences" to generate a parse
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* error message and returns it. If this object has been created
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* due to a parse error, and you do not catch it (it gets thrown
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* from the parser), then this method is called during the printing
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* of the final stack trace, and hence the correct error message
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* gets displayed.
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*/
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@Override
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public String getMessage() {
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if (!specialConstructor) {
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return super.getMessage();
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}
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String expected = "";
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int maxSize = 0;
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for (int i = 0; i < expectedTokenSequences.length; i++) {
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if (maxSize < expectedTokenSequences[i].length) {
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maxSize = expectedTokenSequences[i].length;
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}
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for (int j = 0; j < expectedTokenSequences[i].length; j++) {
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expected += tokenImage[expectedTokenSequences[i][j]] + " ";
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}
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if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0) {
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expected += "...";
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}
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expected += eol + " ";
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}
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String retval = "Encountered \"";
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Token tok = currentToken.next;
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for (int i = 0; i < maxSize; i++) {
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if (i != 0) {
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retval += " ";
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}
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if (tok.kind == 0) {
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retval += tokenImage[0];
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break;
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}
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retval += add_escapes(tok.image);
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tok = tok.next;
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}
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retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn + "." + eol;
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if (expectedTokenSequences.length == 1) {
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retval += "Was expecting:" + eol + " ";
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} else {
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retval += "Was expecting one of:" + eol + " ";
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}
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retval += expected;
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return retval;
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}
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/**
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* The end of line string for this machine.
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*/
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protected String eol = System.getProperty("line.separator", "\n");
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/**
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* Used to convert raw characters to their escaped version
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* when these raw version cannot be used as part of an ASCII
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* string literal.
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*/
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protected String add_escapes(String str) {
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StringBuffer retval = new StringBuffer();
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char ch;
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for (int i = 0; i < str.length(); i++) {
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switch (str.charAt(i))
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{
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case 0 :
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continue;
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case '\b':
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retval.append("\\b");
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continue;
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case '\t':
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retval.append("\\t");
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continue;
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case '\n':
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retval.append("\\n");
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continue;
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case '\f':
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retval.append("\\f");
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continue;
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case '\r':
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retval.append("\\r");
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continue;
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case '\"':
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retval.append("\\\"");
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continue;
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case '\'':
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retval.append("\\\'");
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continue;
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case '\\':
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retval.append("\\\\");
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continue;
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default:
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if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
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String s = "0000" + Integer.toString(ch, 16);
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retval.append("\\u" + s.substring(s.length() - 4, s.length()));
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} else {
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retval.append(ch);
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}
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continue;
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}
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}
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return retval.toString();
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}
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}
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