package railo.transformer.bytecode.statement;
import java.util.Stack;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.commons.GeneratorAdapter;
import railo.transformer.bytecode.BytecodeContext;
import railo.transformer.bytecode.BytecodeException;
import railo.transformer.bytecode.Position;
import railo.transformer.bytecode.Statement;
import railo.transformer.bytecode.expression.Expression;
import railo.transformer.bytecode.util.ASMConstants;
import railo.transformer.bytecode.util.Types;
import railo.transformer.bytecode.visitor.OnFinally;
/**
* Return Statement
*/
public final class Return extends StatementBaseNoFinal {
Expression expr;
/**
* Constructor of the class
* @param line
*/
public Return(Position start,Position end) {
super(start,end);
setHasFlowController(true);
//expr=LitString.toExprString("", line);
}
/**
* Constructor of the class
* @param expr
* @param line
*/
public Return(Expression expr, Position start,Position end) {
super(start,end);
this.expr=expr;
setHasFlowController(true);
//if(expr==null)expr=LitString.toExprString("", line);
}
public void _writeOut(BytecodeContext bc) throws BytecodeException {
GeneratorAdapter adapter = bc.getAdapter();
Stack<OnFinally> finallies = bc.getOnFinallyStack();
int len=finallies.size();
OnFinally onFinally;
if(expr==null)ASMConstants.NULL(adapter);
else expr.writeOut(bc, Expression.MODE_REF);
if(len>0) {
int rtn = adapter.newLocal(Types.OBJECT);
adapter.storeLocal(rtn, Types.OBJECT);
for(int i=len-1;i>=0;i--) {
onFinally=finallies.get(i);
onFinally.writeOut(bc);
}
adapter.loadLocal(rtn, Types.OBJECT);
}
if(bc.getMethod().getReturnType().equals(Types.VOID)) {
adapter.pop();
adapter.visitInsn(Opcodes.RETURN);
}
else adapter.visitInsn(Opcodes.ARETURN);
}
/**
*
* @see railo.transformer.bytecode.statement.StatementBase#setParent(railo.transformer.bytecode.Statement)
*/
public void setParent(Statement parent) {
super.setParent(parent);
parent.setHasFlowController(true);
}
}