Class: ASTUtils::Navigation

Inherits:
Object
  • Object
show all
Includes:
NodeHelper
Defined in:
lib/ast_utils/navigation.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from NodeHelper

#each_child_node, #map_child_node

Constructor Details

#initialize(node:) ⇒ Navigation

Returns a new instance of Navigation.



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# File 'lib/ast_utils/navigation.rb', line 9

def initialize(node:)
  @root = node
  @nodes = NodeSet.new
  @parents = {}
end

Instance Attribute Details

#nodes ⇒ Object (readonly)

Returns the value of attribute nodes.



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# File 'lib/ast_utils/navigation.rb', line 5

def nodes
  @nodes
end

#parents ⇒ Object (readonly)

Returns the value of attribute parents.



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# File 'lib/ast_utils/navigation.rb', line 6

def parents
  @parents
end

#root ⇒ Object (readonly)

Returns the value of attribute root.



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# File 'lib/ast_utils/navigation.rb', line 7

def root
  @root
end

Class Method Details

.from(node:) ⇒ Object 



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# File 'lib/ast_utils/navigation.rb', line 32

def self.from(node:)
  new(node: node).tap {|nav| nav.construct }
end

Instance Method Details

#construct ⇒ Object 



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# File 'lib/ast_utils/navigation.rb', line 15

def construct
  set_parent(root)
end

#parent(node) ⇒ Object 



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# File 'lib/ast_utils/navigation.rb', line 28

def parent(node)
  parents[node.__id__]
end

#set_parent(node) ⇒ Object 



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# File 'lib/ast_utils/navigation.rb', line 19

def set_parent(node)
  nodes << node

  each_child_node(node) do |child|
    parents[child.__id__] = node
    set_parent(child)
  end
end