Macro datafusion_common::handle_visit_recursion

macro_rules! handle_visit_recursion {
    (@handle_jump UP) => { ... };
    (@handle_jump DOWN) => { ... };
    (@handle_jump) => { ... };
    ($EXPR:expr $(, $DIRECTION:ident)?) => { ... };
}

This macro is used to control continuation behaviors during tree traversals based on the specified direction. Depending on $DIRECTION and the value of the given expression ($EXPR), which should be a variant of TreeNodeRecursion, the macro results in the following behavior:

• If the expression returns TreeNodeRecursion::Continue, normal execution continues.
• If it returns TreeNodeRecursion::Stop, recursion halts and propagates TreeNodeRecursion::Stop.
• If it returns TreeNodeRecursion::Jump, the continuation behavior depends on the traversal direction:
  • For UP direction, the function returns with TreeNodeRecursion::Jump, bypassing further bottom-up closures until the next top-down closure.
  • For DOWN direction, the function returns with TreeNodeRecursion::Continue, skipping further exploration.
  • If no direction is specified, Jump is treated like Continue.