Class: RuboCop::Cop::Lint::NoReturnInBeginEndBlocks

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

Overview

Checks for the presence of a ‘return` inside a `begin..end` block in assignment contexts. In this situation, the `return` will result in an exit from the current method, possibly leading to unexpected behavior.

Examples:


# bad
@some_variable ||= begin
  return some_value if some_condition_is_met

  do_something
end

# good
@some_variable ||= begin
  if some_condition_is_met
    some_value
  else
    do_something
  end
end

# good
some_variable = if some_condition_is_met
                  return if another_condition_is_met

                  some_value
                else
                  do_something
                end

Constant Summary collapse

MSG = 
'Do not `return` in `begin..end` blocks in assignment contexts.'

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_lvasgn(node) ⇒ Object Also known as: on_or_asgn, on_op_asgn 



41
42
43
44
45
46
47
 
# File 'lib/rubocop/cop/lint/no_return_in_begin_end_blocks.rb', line 41

def on_lvasgn(node)
  node.each_node(:kwbegin) do |kwbegin_node|
    kwbegin_node.each_node(:return) do |return_node|
      add_offense(return_node)
    end
  end
end