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Class: RuboCop::Cop::Performance::RedundantSplitRegexpArgument

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, AutoCorrector, Base
Instance Chain:
self, Base
Inherits: Base
  • Object
Defined in: lib/rubocop/cop/performance/redundant_split_regexp_argument.rb

Overview

Identifies places where split argument can be replaced from a deterministic regexp to a string.

Examples:

# bad
'a,b,c'.split(/,/)

# good
'a,b,c'.split(',')

Constant Summary

Instance Method Summary

Instance Method Details

#determinist_regexp?(regexp_node) ⇒ Boolean (private)

[ GitHub ] 

  


# File 'lib/rubocop/cop/performance/redundant_split_regexp_argument.rb', line 42



def determinist_regexp?(regexp_node)
  DETERMINISTIC_REGEX.match?(regexp_node.source)
end


  








  

    #on_csend(node)  
  



  

    


Alias for #on_send.



  



  [ GitHub ]


  

  


# File 'lib/rubocop/cop/performance/redundant_split_regexp_argument.rb', line 38



alias on_csend on_send


  








  

    #on_send(node)  
    Also known as: #on_csend
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/performance/redundant_split_regexp_argument.rb', line 27



def on_send(node)
  return unless (regexp_node = split_call_with_regexp?(node))
  return if regexp_node.ignore_case? || regexp_node.content == ' '
  return unless determinist_regexp?(regexp_node)

  add_offense(regexp_node) do |corrector|
    new_argument = replacement(regexp_node)

    corrector.replace(regexp_node, "\"#{new_argument}\"")
  end
end


  








  

    #replacement(regexp_node)   (private)
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/performance/redundant_split_regexp_argument.rb', line 46



def replacement(regexp_node)
  regexp_content = regexp_node.content
  stack = []
  chars = regexp_content.chars.each_with_object([]) do |char, strings|
    if stack.empty? && char == '\\'
      stack.push(char)
    else
      strings << "#{stack.pop}#{char}"
    end
  end
  chars.map do |char|
    char = char.dup
    char.delete!('\\') unless STR_SPECIAL_CHARS.include?(char)
    char
  end.join
end