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annotate src/luan/interp/Chunk.java @ 32:c3eab5a3ce3c

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implement closures git-svn-id: https://luan-java.googlecode.com/svn/trunk@33 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Fri, 14 Dec 2012 05:40:35 +0000
parents 5cf15507d77e
children e3624b7cd603
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1 package luan.interp;
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3 import luan.LuaException;
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6 final class Chunk implements Expr {
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7 final Stmt block;
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8 final int stackSize;
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9 final int numArgs;
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10 final boolean isVarArg;
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11 final UpValue.Getter[] upValueGetters;
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13 Chunk(Stmt block,int stackSize,int numArgs,boolean isVarArg,UpValue.Getter[] upValueGetters) {
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14 this.block = block;
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15 this.stackSize = stackSize;
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16 this.numArgs = numArgs;
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17 this.isVarArg = isVarArg;
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18 this.upValueGetters = upValueGetters;
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19 fixReturns(block);
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20 }
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22 private static void fixReturns(Stmt stmt) {
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23 if( stmt instanceof ReturnStmt ) {
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24 ReturnStmt rs = (ReturnStmt)stmt;
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25 rs.throwReturnException = false;
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26 } else if( stmt instanceof Block ) {
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27 Block b = (Block)stmt;
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28 fixReturns( b.stmts[b.stmts.length-1] );
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29 } else if( stmt instanceof IfStmt ) {
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30 IfStmt is = (IfStmt)stmt;
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31 fixReturns( is.thenStmt );
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32 fixReturns( is.elseStmt );
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33 }
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34 }
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36 LuaClosure newClosure(LuaStateImpl lua) {
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37 return new LuaClosure(this,lua);
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38 }
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40 @Override public Object eval(LuaStateImpl lua) {
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41 return newClosure(lua);
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42 }
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44 }