Class: Rubocop::Cop::Style::RescueModifier

Inherits:
Cop
  • Object
show all
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.'

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

#check_rescue(node) ⇒ Object 



31
32
33
34
35
36
37
38
39
40
41
42
43
 
# File 'lib/rubocop/cop/style/rescue_modifier.rb', line 31

def check_rescue(node)
  return unless node

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

#on_def(node) ⇒ Object 



21
22
23
24
 
# File 'lib/rubocop/cop/style/rescue_modifier.rb', line 21

def on_def(node)
  _method_name, _args, body = *node
  check_rescue(body)
end

#on_defs(node) ⇒ Object 



26
27
28
29
 
# File 'lib/rubocop/cop/style/rescue_modifier.rb', line 26

def on_defs(node)
  _receiver, _method_name, _args, body = *node
  check_rescue(body)
end

#on_kwbegin(node) ⇒ Object 



16
17
18
19
 
# File 'lib/rubocop/cop/style/rescue_modifier.rb', line 16

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

#on_rescue(node) ⇒ Object 



10
11
12
13
14
 
# File 'lib/rubocop/cop/style/rescue_modifier.rb', line 10

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

  add_offence(:convention, node.loc.expression, MSG)
end