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comparison 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
parents
children 735708619119
comparison
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103:c6c0aed1dbec 104:754e6030c029
1 package luan.parser;
2
3
4 public class ParseException extends Exception {
5 public final String text;
6 public final int iCurrent;
7 public final int iHigh;
8
9 ParseException(String msg,String text,int iCurrent,int iHigh) {
10 super(msg);
11 this.text = text;
12 this.iCurrent = iCurrent;
13 this.iHigh = iHigh;
14 //System.out.println("iCurrent = "+iCurrent);
15 //System.out.println("iHigh = "+iHigh);
16 }
17
18 private class Location {
19 final int line;
20 final int pos;
21
22 Location(int index) {
23 int line = 0;
24 int i = -1;
25 while(true) {
26 int j = text.indexOf('\n',i+1);
27 if( j == -1 || j > index )
28 break;
29 i = j;
30 line++;
31 }
32 this.line = line;
33 this.pos = index - i - 1;
34 }
35 }
36
37 private String[] lines() {
38 return text.split("\n",-1);
39 }
40
41 public String getFancyMessage() {
42 Location loc = new Location(iCurrent);
43 String line = lines()[loc.line];
44 String msg = getMessage() + " (line " + (loc.line+1) + ", pos " + (loc.pos+1) + ")\n";
45 StringBuilder sb = new StringBuilder(msg);
46 sb.append( line + "\n" );
47 for( int i=0; i<loc.pos; i++ ) {
48 sb.append( line.charAt(i)=='\t' ? '\t' : ' ' );
49 }
50 sb.append("^\n");
51 return sb.toString();
52 }
53 }