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

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

Overview

This cop checks for places where ‘Integer#even?` or `Integer#odd?` can be used.

Examples:


# bad
if x % 2 == 0
end

# good
if x.even?
end

Constant Summary collapse

MSG = 
'Replace with `Integer#%<method>s?`.'

Constants included from Util

Util::LITERAL_REGEX

Instance Attribute Summary

Attributes inherited from Cop

#config, #corrections, #offenses, #processed_source

Instance Method Summary collapse

Methods inherited from Cop

#add_offense, all, autocorrect_incompatible_with, badge, #config_to_allow_offenses, #config_to_allow_offenses=, #cop_config, #cop_name, cop_name, #correct, department, #disable_uncorrectable, #duplicate_location?, #excluded_file?, #external_dependency_checksum, #find_location, #highlights, inherited, #initialize, #join_force?, lint?, match?, #message, #messages, #parse, qualified_cop_name, #reason_to_not_correct, #relevant_file?, #target_rails_version, #target_ruby_version

Methods included from AST::Sexp

#s

Methods included from NodePattern::Macros

#def_node_matcher, #def_node_search, #node_search, #node_search_all, #node_search_body, #node_search_first

Methods included from AutocorrectLogic

#autocorrect?, #autocorrect_enabled?, #autocorrect_requested?, #correctable?, #disable_offense, #disable_uncorrectable?, #safe_autocorrect?, #support_autocorrect?

Methods included from IgnoredNode

#ignore_node, #ignored_node?, #part_of_ignored_node?

Methods included from Util

begins_its_line?, comment_line?, double_quotes_required?, escape_string, first_part_of_call_chain, interpret_string_escapes, line_range, needs_escaping?, on_node, parentheses?, same_line?, to_string_literal, to_supported_styles, tokens, trim_string_interporation_escape_character

Methods included from PathUtil

absolute?, chdir, hidden_dir?, hidden_file_in_not_hidden_dir?, match_path?, pwd, relative_path, reset_pwd, smart_path

Constructor Details

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

Instance Method Details

#autocorrect(node) ⇒ Object 



36
37
38
39
40
41
42
43
 
# File 'lib/rubocop/cop/style/even_odd.rb', line 36

def autocorrect(node)
  even_odd_candidate?(node) do |base_number, method, arg|
    replacement_method = replacement_method(arg, method)

    correction = "#{base_number.source}.#{replacement_method}?"
    ->(corrector) { corrector.replace(node.source_range, correction) }
  end
end

#on_send(node) ⇒ Object 



29
30
31
32
33
34
 
# File 'lib/rubocop/cop/style/even_odd.rb', line 29

def on_send(node)
  even_odd_candidate?(node) do |_base_number, method, arg|
    replacement_method = replacement_method(arg, method)
    add_offense(node, message: format(MSG, method: replacement_method))
  end
end