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annotate src/luan/LuanSource.java @ 91:1f8b6edc2b08

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better error message git-svn-id: https://luan-java.googlecode.com/svn/trunk@92 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Thu, 07 Mar 2013 22:52:53 +0000
parents 54a61d1dc070
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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1 package luan;
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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4 public final class LuanSource {
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5 public final String name;
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6 public final String text;
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8 public LuanSource(String name,String text) {
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9 this.name = name;
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10 this.text = text;
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11 }
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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13 public static final class CompilerElement extends LuanElement {
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14 public final LuanSource source;
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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16 public CompilerElement(LuanSource source) {
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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17 if( source==null )
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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18 throw new NullPointerException("source is null");
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19 this.source = source;
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20 }
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22 @Override String location() {
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23 return "Compiling " + source.name;
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24 }
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25 }
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27 public static final class Element extends LuanElement {
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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28 public final LuanSource source;
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29 public final int start;
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30 public final int end;
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32 public Element(LuanSource source,int start,int end) {
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33 if( source==null )
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34 throw new NullPointerException("source is null");
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35 this.source = source;
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36 this.start = start;
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37 while( end > 0 && Character.isWhitespace(source.text.charAt(end-1)) ) {
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38 end--;
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39 }
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40 this.end = end;
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41 }
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43 public String text() {
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44 return source.text.substring(start,end);
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45 }
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47 @Override String location() {
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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48 return source.name + ':' + lineNumber();
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49 }
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51 private int lineNumber() {
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52 int line = 0;
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53 int i = -1;
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54 do {
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55 line++;
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56 i = source.text.indexOf('\n',i+1);
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57 } while( i != -1 && i < start );
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58 return line;
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59 }
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61 }
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62 }