Function copyFrom

tree/nodebase.go:671–691

copyFrom is the implementation of [NodeBase.CopyFrom].

(to, from Node)

// copyFrom is the implementation of [NodeBase.CopyFrom].
func copyFrom(to, from Node) {
	fc := from.AsTree().Children
	if len(fc) == 0 {
		to.AsTree().DeleteChildren()
	} else {
		p := make(TypePlan, len(fc))
		for i, c := range fc {
			p[i].Type = c.AsTree().NodeType()
			p[i].Name = c.AsTree().Name
		}
		UpdateSlice(&to.AsTree().Children, to, p)
	}

	maps.Copy(to.AsTree().Properties, from.AsTree().Properties)

	to.AsTree().This.CopyFieldsFrom(from)
	for i, kid := range to.AsTree().Children {
		fmk := from.AsTree().Child(i)
		copyFrom(kid, fmk)
	}
}

// Clone creates and returns a deep copy of the tree from this node down.
// Any pointers within the cloned tree will correctly point within the new