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view src/luan/interp/ReturnStmt.java @ 49:8ede219cd111
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git-svn-id: https://luan-java.googlecode.com/svn/trunk@50 21e917c8-12df-6dd8-5cb6-c86387c605b9
author | fschmidt@gmail.com <fschmidt@gmail.com@21e917c8-12df-6dd8-5cb6-c86387c605b9> |
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date | Fri, 28 Dec 2012 19:35:04 +0000 |
parents | 64ecb7a3aad7 |
children | 6ca02b188dba |
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package luan.interp; import luan.Luan; import luan.LuanException; import luan.LuanFunction; import luan.LuanSource; final class ReturnStmt extends CodeImpl implements Stmt { private final Expressions expressions; private final Expr tailFnExpr; boolean throwReturnException = true; ReturnStmt(LuanSource.Element se,Expressions expressions) { super(se); if( expressions instanceof FnCall ) { // tail call FnCall fnCall = (FnCall)expressions; this.expressions = fnCall.args; this.tailFnExpr = fnCall.fnExpr; } else { this.expressions = expressions; this.tailFnExpr = null; } } @Override public void eval(LuanStateImpl luan) throws LuanException { luan.returnValues = expressions.eval(luan); if( tailFnExpr != null ) { LuanFunction tailFn = luan.checkFunction( se, tailFnExpr.eval(luan) ); if( tailFn instanceof Closure ) { luan.tailFn = (Closure)tailFn; } else { luan.returnValues = luan.call(tailFn,tailFnExpr.se(),tailFnExpr.se().text(),luan.returnValues); } } if( throwReturnException ) throw new ReturnException(); } }