Class: RuboCop::Cop::Lint::RescueException

Inherits:
Cop
  • Object
show all
Defined in:
lib/rubocop/cop/lint/rescue_exception.rb

Overview

This cop checks for rescue blocks targeting the Exception class.

Constant Summary collapse

MSG =
'Avoid rescuing the `Exception` class.'

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 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_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/lint/rescue_exception.rb', line 22

def autocorrect(node)
  @corrections << lambda do |corrector|
    corrector.remove(
      range_with_surrounding_space(
        node.children.first.children.first.loc.expression,
        :left
      )
    )
  end
end

#on_resbody(node) ⇒ Object


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# File 'lib/rubocop/cop/lint/rescue_exception.rb', line 10

def on_resbody(node)
  return unless node.children.first
  rescue_args = node.children.first.children
  return unless rescue_args.any? { |a| targets_exception?(a) }

  add_offense(node, :expression)
end

#targets_exception?(rescue_arg_node) ⇒ Boolean

Returns:

  • (Boolean)

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# File 'lib/rubocop/cop/lint/rescue_exception.rb', line 18

def targets_exception?(rescue_arg_node)
  Util.const_name(rescue_arg_node) == 'Exception'
end