Class: Rubocop::Cop::Lint::UselessComparison

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

Overview

This cop checks for comparison of something with itself.

Examples:


x.top >= x.top

Constant Summary collapse

MSG = 
'Comparison of something with itself detected.'
OPS = 
%w(== === != < > <= >= <=>)

Instance Attribute Summary

Attributes inherited from Cop

#autocorrect, #corrections, #debug, #disabled_lines, #offences

Instance Method Summary collapse

Methods inherited from Cop

#add_offence, all, #autocorrect_action, cop_name, cop_type, #do_autocorrect, #ignore_node, inherited, #initialize, lint?, #name, rails?, style?

Constructor Details

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

Instance Method Details

#on_send(node) ⇒ Object 



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# File 'lib/rubocop/cop/lint/useless_comparison.rb', line 16

def on_send(node)
  op = node.loc.selector.source

  if OPS.include?(op)
    receiver, _method, selector = *node

    if receiver == selector
      add_offence(:warning, node.loc.selector, MSG)
    end
  end
end