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annotate src/luan/interp/LuanCompiler.java @ 150:f35c50027985
make load() more consistent
git-svn-id: https://luan-java.googlecode.com/svn/trunk@151 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Mon, 16 Jun 2014 10:11:48 +0000 |
parents | f99fd64291b3 |
children | cced1c4d3575 |
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1 package luan.interp; |
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2 |
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3 import luan.LuanFunction; |
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4 import luan.LuanState; |
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5 import luan.LuanException; |
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6 import luan.LuanSource; |
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7 import luan.LuanElement; |
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8 import luan.LuanTable; |
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9 import luan.parser.ParseException; |
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10 import java.util.Map; |
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11 |
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12 |
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13 public final class LuanCompiler { |
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14 private LuanCompiler() {} // never |
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15 |
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16 public static LuanFunction compile(LuanState luan,LuanSource src,LuanTable env,boolean allowExpr) throws LuanException { |
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17 UpValue.Getter envGetter = env!=null ? new UpValue.ValueGetter(env) : new UpValue.EnvGetter(); |
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18 LuanParser parser = new LuanParser(src,envGetter); |
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19 for( Map.Entry<Object,Object> entry : luan.global() ) { |
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20 Object key = entry.getKey(); |
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21 if( key instanceof String ) |
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22 parser.addVar( (String)key, entry.getValue() ); |
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23 } |
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24 FnDef fnDef = parse(luan,parser,allowExpr); |
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25 if( env != null ) |
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26 return new Closure((LuanStateImpl)luan,fnDef); |
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27 final Closure c = new Closure((LuanStateImpl)luan,fnDef); |
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28 return new LuanFunction() { |
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29 @Override public Object call(LuanState luan,Object[] args) throws LuanException { |
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30 Object rtn = c.call(luan,args); |
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31 if( rtn instanceof Object[] && ((Object[])rtn).length==0 ) |
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32 rtn = c.upValues()[0].get(); |
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33 return rtn; |
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34 } |
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35 }; |
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36 } |
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37 |
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38 private static FnDef parse(LuanState luan,LuanParser parser,boolean allowExpr) throws LuanException { |
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39 try { |
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40 if( allowExpr ) { |
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41 FnDef fnDef = parser.Expressions(); |
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42 if( fnDef != null ) |
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43 return fnDef; |
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44 } |
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45 return parser.RequiredModule(); |
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46 } catch(ParseException e) { |
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47 //e.printStackTrace(); |
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48 LuanElement le = new LuanSource.CompilerElement(parser.source); |
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49 throw luan.bit(le).exception( e.getFancyMessage() ); |
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50 } |
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51 } |
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52 |
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53 public static LuanState newLuanState() { |
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54 return new LuanStateImpl(); |
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55 } |
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56 } |