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comparison src/luan/impl/ParseException.java @ 775:1a68fc55a80c

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simplify dir structure
author Franklin Schmidt <fschmidt@gmail.com>
date Fri, 26 Aug 2016 14:36:40 -0600
parents core/src/luan/impl/ParseException.java@b620b8e1010f
children
comparison
equal deleted inserted replaced
774:3e30cf310e56 775:1a68fc55a80c
1 package luan.impl;
2
3
4 public final class ParseException extends Exception {
5 // public final LuanSource src;
6 public final String sourceName;
7 public final String text;
8 public final int iCurrent;
9 public final int iHigh;
10
11 ParseException(String msg,String text,String sourceName,int iCurrent,int iHigh) {
12 super(msg);
13 // this.src = src;
14 this.text = text;
15 this.sourceName = sourceName;
16 this.iCurrent = iCurrent;
17 this.iHigh = iHigh;
18 //System.out.println("iCurrent = "+iCurrent);
19 //System.out.println("iHigh = "+iHigh);
20 }
21
22 private class Location {
23 final int line;
24 final int pos;
25
26 Location(int index) {
27 int line = 0;
28 int i = -1;
29 while(true) {
30 int j = text.indexOf('\n',i+1);
31 if( j == -1 || j >= index )
32 break;
33 i = j;
34 line++;
35 }
36 this.line = line;
37 this.pos = index - i - 1;
38 }
39 }
40
41 private String[] lines() {
42 return text.split("\n",-1);
43 }
44
45 public String getFancyMessage() {
46 Location loc = new Location(iCurrent);
47 String line = lines()[loc.line];
48 String msg = getMessage() + " (line " + (loc.line+1) + ", pos " + (loc.pos+1) + ") in " + sourceName + "\n";
49 StringBuilder sb = new StringBuilder(msg);
50 sb.append( line + "\n" );
51 for( int i=0; i<loc.pos; i++ ) {
52 sb.append( line.charAt(i)=='\t' ? '\t' : ' ' );
53 }
54 sb.append("^\n");
55 return sb.toString();
56 }
57 }