Mercurial Hosting > luan
annotate core/src/luan/impl/ReturnStmt.java @ 171:3dcb0f9bee82
add core component
git-svn-id: https://luan-java.googlecode.com/svn/trunk@172 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Sun, 22 Jun 2014 05:41:22 +0000 |
parents | src/luan/impl/ReturnStmt.java@4eaee12f6c65 |
children | 7580379cdc79 |
rev | line source |
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1 package luan.impl; |
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2 |
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3 import luan.Luan; |
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4 import luan.LuanException; |
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5 import luan.LuanFunction; |
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6 import luan.LuanSource; |
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7 |
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8 |
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9 final class ReturnStmt extends CodeImpl implements Stmt { |
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10 private final Expressions expressions; |
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11 private final Expr tailFnExpr; |
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12 boolean throwReturnException = true; |
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13 |
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14 ReturnStmt(LuanSource.Element se,Expressions expressions) { |
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15 super(se); |
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16 if( expressions instanceof FnCall ) { // tail call |
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17 FnCall fnCall = (FnCall)expressions; |
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18 this.expressions = fnCall.args; |
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19 this.tailFnExpr = fnCall.fnExpr; |
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20 } else { |
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21 this.expressions = expressions; |
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22 this.tailFnExpr = null; |
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23 } |
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24 } |
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25 |
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26 @Override public void eval(LuanStateImpl luan) throws LuanException { |
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27 luan.returnValues = expressions.eval(luan); |
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28 if( tailFnExpr != null ) { |
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29 LuanFunction tailFn = luan.bit(se).checkFunction( tailFnExpr.eval(luan) ); |
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30 if( tailFn instanceof Closure ) { |
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31 luan.tailFn = (Closure)tailFn; |
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32 } else { |
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33 luan.returnValues = luan.bit(tailFnExpr.se()).call(tailFn,tailFnExpr.se().text(),Luan.array(luan.returnValues)); |
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34 } |
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35 } |
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36 if( throwReturnException ) |
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37 throw new ReturnException(); |
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38 } |
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39 } |