Class: RuboCop::Cop::Style::RescueModifier

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

Overview

This cop checks for uses of rescue in its modifier form.

Constant Summary collapse

MSG = 
'Avoid using `rescue` in its modifier form.'

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 OnMethodDef

#on_def, #on_defs

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?, #message, 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_comma, 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

#check(body) ⇒ Object 



27
28
29
30
31
32
33
34
35
36
37
38
39
 
# File 'lib/rubocop/cop/style/rescue_modifier.rb', line 27

def check(body)
  return unless body

  case body.type
  when :rescue
    ignore_node(body)
  when :ensure
    first_child = body.children.first
    if first_child && first_child.type == :rescue
      ignore_node(first_child)
    end
  end
end

#on_kwbegin(node) ⇒ Object 



18
19
20
21
 
# File 'lib/rubocop/cop/style/rescue_modifier.rb', line 18

def on_kwbegin(node)
  body, *_ = *node
  check(body)
end

#on_method_def(_node, _method_name, _args, body) ⇒ Object 



23
24
25
 
# File 'lib/rubocop/cop/style/rescue_modifier.rb', line 23

def on_method_def(_node, _method_name, _args, body)
  check(body)
end

#on_rescue(node) ⇒ Object 



12
13
14
15
16
 
# File 'lib/rubocop/cop/style/rescue_modifier.rb', line 12

def on_rescue(node)
  return if ignored_node?(node)

  add_offense(node, :expression)
end