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Module: RuboCop::Ext::RegexpNode

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Instance Chain:
self, RuboCop::Ext::RegexpNode.self
Defined in: lib/rubocop/ext/regexp_node.rb

Overview

Extensions to AST::RegexpNode for our cached parsed regexp info

Constant Summary

Instance Attribute Summary

Instance Method Summary

Instance Attribute Details

#parsed_tree ⇒ Regexp::Expression::Root? (readonly)

Note: we extend Regexp nodes to provide loc and expression see ext/regexp_parser.

[ GitHub ] 

  


# File 'lib/rubocop/ext/regexp_node.rb', line 16



attr_reader :parsed_tree


  







Instance Method Details



  

    #assign_properties  
  



  

    


Please remove this else branch when support for regexp_parser 1.8 will be dropped.
It’s for compatibility with regexp_parser 1.8 and will never be maintained.



  



  [ GitHub ]


  

  


# File 'lib/rubocop/ext/regexp_node.rb', line 34



def assign_properties(*)
  super

  str = with_interpolations_blanked
  @parsed_tree = begin
    Regexp::Parser.parse(str, options: options)
  rescue StandardError
    nil
  end
  origin = loc.begin.end
  @parsed_tree&.each_expression(true) { |e| e.origin = origin }
end


  








  

    #each_capture(named: ANY)  
  

  [ GitHub ]


  

  


# File 'lib/rubocop/ext/regexp_node.rb', line 53



def each_capture(named: ANY)
  return enum_for(__method__, named: named) unless block_given?

  parsed_tree&.traverse do |event, exp, _index|
    yield(exp) if named_capturing?(exp, event, named)
  end

  self
end


  








  

    #named_capturing?(exp, event, named)  ⇒ Boolean  (private)
  



  

    
  





  


  [ GitHub ]


  

  


# File 'lib/rubocop/ext/regexp_node.rb', line 65



def named_capturing?(exp, event, named)
  event == :enter &&
    named == exp.respond_to?(:name) &&
    !exp.text.start_with?('(?<=') &&
    exp.respond_to?(:capturing?) &&
    exp.capturing?
end


  








  

    #with_interpolations_blanked   (private)
  

  [ GitHub ]


  

  


# File 'lib/rubocop/ext/regexp_node.rb', line 73



def with_interpolations_blanked
  # Ignore the trailing regopt node
  children[0...-1].map do |child|
    source = child.source

    # We don't want to consider the contents of interpolations as part of the pattern source,
    # but need to preserve their width, to allow offsets to correctly line up with the
    # original source: spaces have no effect, and preserve width.
    if child.begin_type?
      ' ' * source.length
    else
      source
    end
  end.join
end