node->son

node ->son: son=node, before=[node]*

Makes the argument node a son of this node. This is the most common way to build a hierarchy. If before is @nil or @default, the child is added at the end of the node<-sons chain. Otherwise it is added just in front of the before argument.

Diagnostics: # <Node> already in a tree Argument node is member of another tree.

<Node> should be in a tree The receiver node is not in a tree.

See also
- node-sons
- node->move