Class: Rubocop::Cop::EmptyLiteral

Inherits:
Cop
  • Object
show all
Defined in:
lib/rubocop/cop/empty_literal.rb

Constant Summary collapse

ARR_MSG = 
'Use array literal [] instead of Array.new.'
HASH_MSG = 
'Use hash literal {} instead of Hash.new.'
STR_MSG = 
"Use string literal '' instead of String.new."
ARRAY_NODE =

Empty array node

(send

(const nil :Array) :new)

s(:send, s(:const, nil, :Array), :new)
HASH_NODE =

Empty hash node

(send

(const nil :Hash) :new)

s(:send, s(:const, nil, :Hash), :new)
STR_NODE =

Empty string node

(send

(const nil :String) :new)

s(:send, s(:const, nil, :String), :new)

Instance Attribute Summary

Attributes inherited from Cop

#debug, #disabled_lines, #offences

Instance Method Summary collapse

Methods inherited from Cop

#add_offence, cop_name, #has_report?, inherited, #initialize, #name, #on_comment

Constructor Details

This class inherits a constructor from Rubocop::Cop::Cop

Instance Method Details

#inspect(source, tokens, ast, comments) ⇒ Object 



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# File 'lib/rubocop/cop/empty_literal.rb', line 28

def inspect(source, tokens, ast, comments)
  on_node(:send, ast, :block) do |node|
    if node == ARRAY_NODE
      add_offence(:convention,
                  node.loc.line,
                  ARR_MSG)
    elsif node == HASH_NODE
      add_offence(:convention,
                  node.loc.line,
                  HASH_MSG)
    elsif node == STR_NODE
      add_offence(:convention,
                  node.loc.line,
                  STR_MSG)
    end
  end
end