// Copyright (c) 2013-2014, Webit Team. All Rights Reserved.
package webit.script.core.ast.operators;
import webit.script.Context;
import webit.script.core.ast.BinaryOperator;
import webit.script.core.ast.Expression;
import webit.script.core.ast.Optimizable;
import webit.script.core.ast.expressions.DirectValue;
import webit.script.util.ALU;
import webit.script.util.StatementUtil;
/**
*
* @author Zqq
*/
public final class LShift extends BinaryOperator implements Optimizable {
public LShift(Expression leftExpr, Expression rightExpr, int line, int column) {
super(leftExpr, rightExpr, line, column);
}
public Object execute(final Context context) {
try {
return ALU.lshift(leftExpr.execute(context), rightExpr.execute(context));
} catch (Exception e) {
throw StatementUtil.castToScriptRuntimeException(e, this);
}
}
public Expression optimize() {
return (leftExpr instanceof DirectValue && rightExpr instanceof DirectValue)
? new DirectValue(ALU.lshift(((DirectValue) leftExpr).value, ((DirectValue) rightExpr).value), line, column)
: this;
}
}