| ParseException.java |
1 /* Generated By:JavaCC: Do not edit this line. ParseException.java Version 7.0 */
2 /* JavaCCOptions:KEEP_LINE_COLUMN=true */
3 package jminusminus;
4
5 /**
6 * This exception is thrown when parse errors are encountered.
7 * You can explicitly create objects of this exception type by
8 * calling the method generateParseException in the generated
9 * parser.
10 *
11 * You can modify this class to customize your error reporting
12 * mechanisms so long as you retain the public fields.
13 */
14 public class ParseException extends Exception {
15
16 /**
17 * The version identifier for this Serializable class.
18 * Increment only if the <i>serialized</i> form of the
19 * class changes.
20 */
21 private static final long serialVersionUID = 1L;
22
23 /**
24 * The end of line string for this machine.
25 */
26 protected static String EOL = System.getProperty("line.separator", "\n");
27
28 /**
29 * This constructor is used by the method "generateParseException"
30 * in the generated parser. Calling this constructor generates
31 * a new object of this type with the fields "currentToken",
32 * "expectedTokenSequences", and "tokenImage" set.
33 */
34 public ParseException(Token currentTokenVal,
35 int[][] expectedTokenSequencesVal,
36 String[] tokenImageVal
37 )
38 {
39 super(initialise(currentTokenVal, expectedTokenSequencesVal, tokenImageVal));
40 currentToken = currentTokenVal;
41 expectedTokenSequences = expectedTokenSequencesVal;
42 tokenImage = tokenImageVal;
43 }
44
45 /**
46 * The following constructors are for use by you for whatever
47 * purpose you can think of. Constructing the exception in this
48 * manner makes the exception behave in the normal way - i.e., as
49 * documented in the class "Throwable". The fields "errorToken",
50 * "expectedTokenSequences", and "tokenImage" do not contain
51 * relevant information. The JavaCC generated code does not use
52 * these constructors.
53 */
54
55 public ParseException() {
56 super();
57 }
58
59 /** Constructor with message. */
60 public ParseException(String message) {
61 super(message);
62 }
63
64
65 /**
66 * This is the last token that has been consumed successfully. If
67 * this object has been created due to a parse error, the token
68 * followng this token will (therefore) be the first error token.
69 */
70 public Token currentToken;
71
72 /**
73 * Each entry in this array is an array of integers. Each array
74 * of integers represents a sequence of tokens (by their ordinal
75 * values) that is expected at this point of the parse.
76 */
77 public int[][] expectedTokenSequences;
78
79 /**
80 * This is a reference to the "tokenImage" array of the generated
81 * parser within which the parse error occurred. This array is
82 * defined in the generated ...Constants interface.
83 */
84 public String[] tokenImage;
85
86 /**
87 * It uses "currentToken" and "expectedTokenSequences" to generate a parse
88 * error message and returns it. If this object has been created
89 * due to a parse error, and you do not catch it (it gets thrown
90 * from the parser) the correct error message
91 * gets displayed.
92 */
93 private static String initialise(Token currentToken,
94 int[][] expectedTokenSequences,
95 String[] tokenImage) {
96
97 StringBuffer expected = new StringBuffer();
98 int maxSize = 0;
99 for (int i = 0; i < expectedTokenSequences.length; i++) {
100 if (maxSize < expectedTokenSequences[i].length) {
101 maxSize = expectedTokenSequences[i].length;
102 }
103 for (int j = 0; j < expectedTokenSequences[i].length; j++) {
104 expected.append(tokenImage[expectedTokenSequences[i][j]]).append(' ');
105 }
106 if (expectedTokenSequences[i][expectedTokenSequences[i].length - 1] != 0) {
107 expected.append("...");
108 }
109 expected.append(EOL).append(" ");
110 }
111 String retval = "Encountered \"";
112 Token tok = currentToken.next;
113 for (int i = 0; i < maxSize; i++) {
114 if (i != 0) retval += " ";
115 if (tok.kind == 0) {
116 retval += tokenImage[0];
117 break;
118 }
119 retval += " " + tokenImage[tok.kind];
120 retval += " \"";
121 retval += add_escapes(tok.image);
122 retval += " \"";
123 tok = tok.next;
124 }
125 retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn;
126 retval += "." + EOL;
127
128
129 if (expectedTokenSequences.length == 0) {
130 // Nothing to add here
131 } else {
132 if (expectedTokenSequences.length == 1) {
133 retval += "Was expecting:" + EOL + " ";
134 } else {
135 retval += "Was expecting one of:" + EOL + " ";
136 }
137 retval += expected.toString();
138 }
139
140 return retval;
141 }
142
143
144 /**
145 * Used to convert raw characters to their escaped version
146 * when these raw version cannot be used as part of an ASCII
147 * string literal.
148 */
149 static String add_escapes(String str) {
150 StringBuffer retval = new StringBuffer();
151 char ch;
152 for (int i = 0; i < str.length(); i++) {
153 switch (str.charAt(i))
154 {
155 case '\b':
156 retval.append("\\b");
157 continue;
158 case '\t':
159 retval.append("\\t");
160 continue;
161 case '\n':
162 retval.append("\\n");
163 continue;
164 case '\f':
165 retval.append("\\f");
166 continue;
167 case '\r':
168 retval.append("\\r");
169 continue;
170 case '\"':
171 retval.append("\\\"");
172 continue;
173 case '\'':
174 retval.append("\\\'");
175 continue;
176 case '\\':
177 retval.append("\\\\");
178 continue;
179 default:
180 if ((ch = str.charAt(i)) < 0x20 || ch > 0x7e) {
181 String s = "0000" + Integer.toString(ch, 16);
182 retval.append("\\u" + s.substring(s.length() - 4, s.length()));
183 } else {
184 retval.append(ch);
185 }
186 continue;
187 }
188 }
189 return retval.toString();
190 }
191
192 }
193 /* JavaCC - OriginalChecksum=f012ebdef633cce027f75f33e7e8b64b (do not edit this line) */
194