Mercurial Hosting > luan
annotate core/src/luan/impl/ParseException.java @ 208:5ba136769034
remove MetatableGetter and use a generic metatable instead
git-svn-id: https://luan-java.googlecode.com/svn/trunk@209 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Tue, 08 Jul 2014 07:04:47 +0000 |
parents | 3dcb0f9bee82 |
children | 859c0dedc8b6 |
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move luan/interp to impl
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1 package luan.impl; |
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2 |
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3 import luan.LuanSource; |
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4 |
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5 |
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6 public final class ParseException extends Exception { |
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7 public final LuanSource src; |
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8 public final int iCurrent; |
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9 public final int iHigh; |
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10 |
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11 ParseException(String msg,LuanSource src,int iCurrent,int iHigh) { |
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12 super(msg); |
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13 this.src = src; |
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14 this.iCurrent = iCurrent; |
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15 this.iHigh = iHigh; |
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16 //System.out.println("iCurrent = "+iCurrent); |
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17 //System.out.println("iHigh = "+iHigh); |
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18 } |
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19 |
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20 private class Location { |
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21 final int line; |
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22 final int pos; |
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23 |
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24 Location(int index) { |
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25 int line = 0; |
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26 int i = -1; |
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27 while(true) { |
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28 int j = src.text.indexOf('\n',i+1); |
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29 if( j == -1 || j >= index ) |
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30 break; |
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31 i = j; |
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32 line++; |
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33 } |
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34 this.line = line; |
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35 this.pos = index - i - 1; |
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36 } |
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37 } |
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38 |
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39 private String[] lines() { |
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40 return src.text.split("\n",-1); |
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41 } |
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42 |
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43 public String getFancyMessage() { |
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44 Location loc = new Location(iCurrent); |
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45 String line = lines()[loc.line]; |
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46 String msg = getMessage() + " (line " + (loc.line+1) + ", pos " + (loc.pos+1) + ") in " + src.name + "\n"; |
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47 StringBuilder sb = new StringBuilder(msg); |
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48 sb.append( line + "\n" ); |
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49 for( int i=0; i<loc.pos; i++ ) { |
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50 sb.append( line.charAt(i)=='\t' ? '\t' : ' ' ); |
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51 } |
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52 sb.append("^\n"); |
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53 return sb.toString(); |
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54 } |
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55 } |