Class: TreeRb::BasicTreeNodeVisitor

Inherits:

Object

show all

Overview

Callback methods used to visit a tree Are empty so it is possible to define only a subset when deriving subclass

#cannot_enter_node(tree_node, error) ⇒ Object

called when the tree node is not accessible or an exception is raise when the node is accessed.
#cannot_visit_leaf(tree_node, error) ⇒ Object

called when the leaf node is not accessible or an exception is raise when the node is accessed.
#enter_node(tree_node) ⇒ Object

called on tree node at start of the visit i.e.
#exit_node(tree_node) ⇒ Object

called on tree node at end of the visit i.e.
#visit_leaf(leaf_node) ⇒ Object

called when visit leaf node.

called when the tree node is not accessible or an exception is raise when the node is accessed



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# File 'lib/tree_rb/core/basic_tree_node_visitor.rb', line 18

def cannot_enter_node( tree_node, error)
end

called when the leaf node is not accessible or an exception is raise when the node is accessed



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# File 'lib/tree_rb/core/basic_tree_node_visitor.rb', line 40

def cannot_visit_leaf( tree_node, error)
end

called on tree node at start of the visit i.e. we start to visit the subtree



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# File 'lib/tree_rb/core/basic_tree_node_visitor.rb', line 12

def enter_node( tree_node )
end

called on tree node at end of the visit i.e. oll subtree are visited



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# File 'lib/tree_rb/core/basic_tree_node_visitor.rb', line 26

def exit_node( tree_node )
end

called when visit leaf node



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# File 'lib/tree_rb/core/basic_tree_node_visitor.rb', line 34

def visit_leaf( leaf_node )
end