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annotate src/luan/parser/ParseException.java @ 104:754e6030c029

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remove parboiled and rewrite parser; add jline; git-svn-id: https://luan-java.googlecode.com/svn/trunk@105 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Mon, 12 May 2014 05:57:53 +0000
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children 735708619119
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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104
754e6030c029 remove parboiled and rewrite parser;
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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1 package luan.parser;
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4 public class ParseException extends Exception {
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5 public final String text;
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6 public final int iCurrent;
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7 public final int iHigh;
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9 ParseException(String msg,String text,int iCurrent,int iHigh) {
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10 super(msg);
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11 this.text = text;
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12 this.iCurrent = iCurrent;
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13 this.iHigh = iHigh;
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14 //System.out.println("iCurrent = "+iCurrent);
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15 //System.out.println("iHigh = "+iHigh);
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16 }
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18 private class Location {
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19 final int line;
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20 final int pos;
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22 Location(int index) {
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23 int line = 0;
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24 int i = -1;
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25 while(true) {
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26 int j = text.indexOf('\n',i+1);
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27 if( j == -1 || j > index )
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28 break;
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29 i = j;
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30 line++;
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31 }
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32 this.line = line;
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33 this.pos = index - i - 1;
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34 }
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35 }
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37 private String[] lines() {
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38 return text.split("\n",-1);
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39 }
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41 public String getFancyMessage() {
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42 Location loc = new Location(iCurrent);
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43 String line = lines()[loc.line];
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44 String msg = getMessage() + " (line " + (loc.line+1) + ", pos " + (loc.pos+1) + ")\n";
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45 StringBuilder sb = new StringBuilder(msg);
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46 sb.append( line + "\n" );
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47 for( int i=0; i<loc.pos; i++ ) {
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48 sb.append( line.charAt(i)=='\t' ? '\t' : ' ' );
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49 }
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50 sb.append("^\n");
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51 return sb.toString();
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52 }
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53 }