Class: Unparser::AST::Walker

Inherits:

Object

• Object
• Unparser::AST::Walker

Defined in:

lib/unparser/ast.rb

Overview

Controlled AST walker walking the AST in deeth first search with pre order

Class Method Summary

• .call(node, controller = TAUTOLOGY, &block) ⇒ self private

  Call ast walker.

Instance Method Summary

• #call(node) ⇒ self private

  Call walker with node.

Class Method Details

.call(node, controller = TAUTOLOGY, &block) ⇒ self

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Call ast walker

Parameters:

• node (Parser::AST::Node)

Returns:

• (self)

# File 'lib/unparser/ast.rb', line 171

def self.call(node, controller = TAUTOLOGY, &block)
  new(block, controller).call(node)
  self
end

Instance Method Details

#call(node) ⇒ self

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Call walker with node

Parameters:

• node (Parser::AST::Node)

Returns:

• (self)

# File 'lib/unparser/ast.rb', line 184

def call(node)
  return unless controller.call(node)
  block.call(node)
  node.children.each do |child|
    next unless child.is_a?(Parser::AST::Node)
    call(child)
  end
  self
end