Ejemplo n.º 1
0
 /**
  * This constructor is used by the method "generateParseException"
  * in the generated parser.  Calling this constructor generates
  * a new object of this type with the fields "currentToken",
  * "expectedTokenSequences", and "tokenImage" set.
  */
 public ParseException(Token currentTokenVal,
                       int[][] expectedTokenSequencesVal,
                       string[] tokenImageVal
                      )
     : base(initialise(currentTokenVal, expectedTokenSequencesVal, tokenImageVal))
 {
     currentToken = currentTokenVal;
     expectedTokenSequences = expectedTokenSequencesVal;
     tokenImage = tokenImageVal;
 }
Ejemplo n.º 2
0
 /**
  * It uses "currentToken" and "expectedTokenSequences" to generate a parse
  * error message and returns it.  If this object has been created
  * due to a parse error, and you do not catch it (it gets thrown
  * from the parser) the correct error message
  * gets displayed.
  */
 private static string initialise(Token currentToken,
                          int[][] expectedTokenSequences,
                          string[] tokenImage)
 {
     string eol = System.getProperty("line.separator", "\n");
     StringBuilder expected = new StringBuilder();
     int maxSize = 0;
     for (int i = 0; i < expectedTokenSequences.Length; i++)
     {
         if (maxSize < expectedTokenSequences[i].Length)
         {
             maxSize = expectedTokenSequences[i].Length;
         }
         for (int j = 0; j < expectedTokenSequences[i].Length; j++)
         {
             expected.Append(tokenImage[expectedTokenSequences[i][j]]).Append(' ');
         }
         if (expectedTokenSequences[i][expectedTokenSequences[i].Length - 1] != 0)
         {
             expected.Append("...");
         }
         expected.Append(eol).Append("    ");
     }
     String retval = "Encountered \"";
     Token tok = currentToken.next;
     for (int i = 0; i < maxSize; i++)
     {
         if (i != 0) retval += " ";
         if (tok.kind == 0)
         {
             retval += tokenImage[0];
             break;
         }
         retval += " " + tokenImage[tok.kind];
         retval += " \"";
         retval += add_escapes(tok.image);
         retval += " \"";
         tok = tok.next;
     }
     retval += "\" at line " + currentToken.next.beginLine + ", column " + currentToken.next.beginColumn;
     retval += "." + eol;
     if (expectedTokenSequences.Length == 1)
     {
         retval += "Was expecting:" + eol + "    ";
     }
     else
     {
         retval += "Was expecting one of:" + eol + "    ";
     }
     retval += expected.ToString();
     return retval;
 }