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annotate src/luan/interp/Block.java @ 23:2446c1755d9b

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minor git-svn-id: https://luan-java.googlecode.com/svn/trunk@24 21e917c8-12df-6dd8-5cb6-c86387c605b9
author fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
date Thu, 06 Dec 2012 00:35:13 +0000
parents c93d8c781853
children 5cf15507d77e
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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1 package luan.interp;
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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3 import luan.LuaState;
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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4 import luan.LuaException;
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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7 final class Block implements Stmt {
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8 final Stmt[] stmts;
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9 private final int stackStart;
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10 private final int stackEnd;
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12 Block(Stmt[] stmts,int stackStart,int stackEnd) {
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13 if( stmts.length==0 )
fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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14 throw new RuntimeException("empty block");
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15 this.stmts = stmts;
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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16 this.stackStart = stackStart;
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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17 this.stackEnd = stackEnd;
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18 }
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20 @Override public void eval(LuaState lua) throws LuaException {
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21 try {
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22 for( Stmt stmt : stmts ) {
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23 stmt.eval(lua);
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24 }
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25 } finally {
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fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9>
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26 Object[] stack = lua.stack();
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27 for( int i=stackStart; i<stackEnd; i++ ) {
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28 stack[i] = null;
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29 }
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30 }
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31 }
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33 }