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

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

Overview

Checks for ‘rescue` blocks targeting the Exception class.

Examples:


# bad
begin
  do_something
rescue Exception
  handle_exception
end

# good
begin
  do_something
rescue ArgumentError
  handle_exception
end

Constant Summary collapse

MSG = 
'Avoid rescuing the `Exception` class. Perhaps you meant to rescue `StandardError`?'

Constants inherited from Base

Base::RESTRICT_ON_SEND

Instance Attribute Summary

Attributes inherited from Base

#config, #processed_source

Instance Method Summary collapse

Methods inherited from Base

#active_support_extensions_enabled?, #add_global_offense, #add_offense, #always_autocorrect?, autocorrect_incompatible_with, badge, #begin_investigation, #callbacks_needed, callbacks_needed, #config_to_allow_offenses, #config_to_allow_offenses=, #contextual_autocorrect?, #cop_config, cop_name, #cop_name, department, documentation_url, exclude_from_registry, #excluded_file?, #external_dependency_checksum, inherited, #initialize, #inspect, joining_forces, lint?, match?, #message, #offenses, #on_investigation_end, #on_new_investigation, #on_other_file, #parse, #parser_engine, #ready, #relevant_file?, requires_gem, #string_literals_frozen_by_default?, support_autocorrect?, support_multiple_source?, #target_rails_version, #target_ruby_version

Methods included from ExcludeLimit

#exclude_limit

Methods included from AutocorrectLogic

#autocorrect?, #autocorrect_enabled?, #autocorrect_requested?, #autocorrect_with_disable_uncorrectable?, #correctable?, #disable_uncorrectable?, #safe_autocorrect?

Methods included from IgnoredNode

#ignore_node, #ignored_node?, #part_of_ignored_node?

Methods included from Util

silence_warnings

Constructor Details

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

Instance Method Details

#on_resbody(node) ⇒ Object 



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# File 'lib/rubocop/cop/lint/rescue_exception.rb', line 26

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)
end

#targets_exception?(rescue_arg_node) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rubocop/cop/lint/rescue_exception.rb', line 35

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