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annotate core/src/luan/impl/LuanCompiler.java @ 321:7f7708e8fdd4

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remove import statement git-svn-id: https://luan-java.googlecode.com/svn/trunk@322 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Sun, 08 Feb 2015 07:26:20 +0000
parents fed1893821bf
children 0be73ac9103d
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.impl;
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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.Luan;
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10 import luan.modules.JavaLuan;
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11 import luan.modules.PackageLuan;
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12 import java.util.Map;
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14
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15 public final class LuanCompiler {
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16 private LuanCompiler() {} // never
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18 public static LuanFunction compile(LuanState luan,LuanSource src,LuanTable env,boolean allowExpr) throws LuanException {
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19 boolean passedEnv = env != null;
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20 if( !passedEnv )
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21 env = Luan.newTable();
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22 UpValue.Getter envGetter = new UpValue.ValueGetter(env);
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23 LuanParser parser = new LuanParser(src,envGetter);
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24 parser.addVar( "java", JavaLuan.javaFn );
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25 parser.addVar( "require", PackageLuan.requireFn );
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26 FnDef fnDef = parse(luan,parser,allowExpr);
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27 final LuanStateImpl luanImpl = (LuanStateImpl)luan;
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28 final Closure c = new Closure(luanImpl,fnDef);
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29 if( passedEnv )
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30 return c;
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31 return new LuanFunction() {
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32 @Override public Object call(LuanState luan,Object[] args) throws LuanException {
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33 Object rtn = c.call(luan,args);
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34 if( rtn instanceof Object[] && ((Object[])rtn).length==0 )
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35 rtn = c.upValues()[0].get();
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36 return rtn;
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37 }
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38 };
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39 }
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41 private static FnDef parse(LuanState luan,LuanParser parser,boolean allowExpr) throws LuanException {
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42 try {
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43 if( allowExpr ) {
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44 FnDef fnDef = parser.Expression();
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45 if( fnDef != null )
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46 return fnDef;
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47 }
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48 return parser.RequiredModule();
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49 } catch(ParseException e) {
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50 //e.printStackTrace();
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51 LuanElement le = new LuanSource.CompilerElement(parser.source);
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52 throw luan.bit(le).exception( e.getFancyMessage() );
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53 }
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54 }
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56 public static LuanState newLuanState() {
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57 return new LuanStateImpl();
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58 }
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59 }