Class: RuboCop::Cop::Style::EvenOdd

Inherits:

Cop

• Object
• Cop
• RuboCop::Cop::Style::EvenOdd

Defined in:

lib/rubocop/cop/style/even_odd.rb

Overview

This cop checks for places where Fixnum#even? or Fixnum#odd? should have been used.

Examples:

# bad
if x % 2 == 0

# good
if x.even?

Constant Summary

MSG =

'Replace with `Fixnum#%s?`.'

ZERO =

s(:int, 0)

ONE =

s(:int, 1)

TWO =

s(:int, 2)

Constants included from Util

Util::ASGN_NODES, Util::BASIC_LITERALS, Util::EQUALS_ASGN_NODES, Util::LITERALS, Util::OPERATOR_METHODS, Util::PROC_NEW_NODE, Util::SHORTHAND_ASGN_NODES

Instance Attribute Summary

Attributes inherited from Cop

#config, #corrections, #offenses, #processed_source

Instance Method Summary

• #autocorrect(node) ⇒ Object
• #on_send(node) ⇒ Object

Methods inherited from Cop

#add_offense, all, #config_to_allow_offenses, #config_to_allow_offenses=, #cop_config, cop_name, #cop_name, cop_type, #correct, #debug?, #details, #display_cop_names?, #display_style_guide?, #excluded_file?, #extra_details?, inherited, #initialize, #join_force?, lint?, match?, #message, non_rails, qualified_cop_name, rails?, #reference_url, #relevant_file?, #style_guide_url

Methods included from NodePattern::Macros

#def_node_matcher, #def_node_search

Methods included from AutocorrectLogic

#autocorrect?, #autocorrect_enabled?, #autocorrect_requested?, #support_autocorrect?

Methods included from IgnoredNode

#ignore_node, #ignored_node?, #part_of_ignored_node?

Methods included from Util

begins_its_line?, block_length, command?, comment_line?, const_name, directions, first_part_of_call_chain, lambda?, lambda_or_proc?, line_range, move_pos, numeric_range_size, on_node, operator?, parentheses?, proc?, range_with_surrounding_comma, range_with_surrounding_space, source_range, strip_quotes, within_node?

Methods included from PathUtil

hidden?, issue_deprecation_warning, match_path?, relative_path

Constructor Details

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

Instance Method Details

#autocorrect(node) ⇒ Object

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

def autocorrect(node)
  correction = "#{base_number(node)}.#{offense_type(node)}?"
  ->(corrector) { corrector.replace(node.loc.expression, correction) }
end

#on_send(node) ⇒ Object

# File 'lib/rubocop/cop/style/even_odd.rb', line 23

def on_send(node)
  offense = offense_type(node)
  add_offense(node, :expression, format(MSG, offense)) if offense
end