Method transform_children

datafusion/common/src/tree_node.rs:724–741

Maps the [`Transformed`] object to the result of the given `f` depending on the current [`TreeNodeRecursion`] value and the fact that `f` is changing the current node's children.

(
        mut self,
        f: F,
    )

    /// current [`TreeNodeRecursion`] value and the fact that `f` is changing the current
    /// node's children.
    pub fn transform_children<F: FnOnce(T) -> Result<Transformed<T>>>(
        mut self,
        f: F,
    ) -> Result<Transformed<T>> {
        match self.tnr {
            TreeNodeRecursion::Continue => {
                return f(self.data).map(|mut t| {
                    t.transformed |= self.transformed;
                    t
                });
            }
            TreeNodeRecursion::Jump => {
                self.tnr = TreeNodeRecursion::Continue;
            }
            TreeNodeRecursion::Stop => {}
        }
        Ok(self)
    }

    /// Maps the [`Transformed`] object to the result of the given `f` depending on the
    /// current [`TreeNodeRecursion`] value and the fact that `f` is changing the current