Class: RuboCop::Cop::Style::ClassCheck

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

Overview

This cop enforces consistent use of Object#is_a? or Object#kind_of?.

Constant Summary collapse

MSG =
'Prefer `Object#%s` over `Object#%s`.'

Constants included from Util

Util::ASGN_NODES, Util::EQUALS_ASGN_NODES, 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 collapse

Methods included from ConfigurableEnforcedStyle

#alternative_style, #both_styles_detected, #correct_style_detected, #opposite_style_detected, #parameter_name, #style, #unrecognized_style_detected

Methods inherited from Cop

#add_offense, all, #autocorrect?, #config_to_allow_offenses, #config_to_allow_offenses=, #cop_config, cop_name, #cop_name, cop_name_with_namespace, cop_type, #debug?, #display_cop_names?, inherited, #initialize, #join_force?, lint?, non_rails, qualified_cop_name, rails?, #relevant_file?, #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, first_part_of_call_chain, lambda?, lambda_or_proc?, line_range, numeric_range_size, on_node, operator?, parentheses?, proc?, range_with_surrounding_space, source_range, strip_quotes, within_node?

Methods included from PathUtil

issue_deprecation_warning, match_path?, relative_path

Constructor Details

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

Instance Method Details

#autocorrect(node) ⇒ Object


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# File 'lib/rubocop/cop/style/class_check.rb', line 31

def autocorrect(node)
  _receiver, method_name, *_args = *node

  @corrections << lambda do |corrector|
    corrector.replace(node.loc.selector,
                      method_name == :is_a? ? 'kind_of?' : 'is_a?')
  end
end

#message(node) ⇒ Object


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# File 'lib/rubocop/cop/style/class_check.rb', line 21

def message(node)
  _receiver, method_name, *_args = *node

  if method_name == :is_a?
    format(MSG, 'kind_of?', 'is_a?')
  else
    format(MSG, 'is_a?', 'kind_of?')
  end
end

#on_send(node) ⇒ Object


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# File 'lib/rubocop/cop/style/class_check.rb', line 12

def on_send(node)
  _receiver, method_name, *_args = *node
  return unless [:is_a?,
                 :kind_of?].include?(method_name)

  return if style == method_name
  add_offense(node, :selector)
end