module hunt.sql.ast.SQLExprImpl; import hunt.sql.ast.SQLObjectImpl; import hunt.sql.ast.SQLExpr; import hunt.sql.ast.SQLObject; import hunt.sql.ast.SQLDataType; import hunt.collection; abstract class SQLExprImpl : SQLObjectImpl, SQLExpr { public this(){ } override public abstract bool opEquals(Object o); override public abstract size_t toHash(); public override SQLExpr clone() { throw new Exception("Unsupported Operation"); } public override SQLDataType computeDataType() { return null; } public List!SQLObject getChildren() { return new ArrayList!SQLObject(); } }