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Class: RuboCop::Cop::Layout::EmptyLinesAroundExceptionHandlingKeywords

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::RuboCop::Cop::AutoCorrector, ::RuboCop::Cop::Base, ::RuboCop::ExcludeLimit, NodePattern::Macros, RuboCop::AST::Sexp
Instance Chain:
self, EmptyLinesAroundBody, ::RuboCop::Cop::RangeHelp, ::RuboCop::Cop::ConfigurableEnforcedStyle, ::RuboCop::Cop::Base, ::RuboCop::Cop::AutocorrectLogic, ::RuboCop::Cop::IgnoredNode, ::RuboCop::Util, RuboCop::AST::Sexp
Inherits: RuboCop::Cop::Base
  • Object
Defined in: lib/rubocop/cop/layout/empty_lines_around_exception_handling_keywords.rb

Overview

Checks if empty lines exist around the bodies of begin sections. This cop doesn’t check empty lines at begin body beginning/end and around method definition body. Style/EmptyLinesAroundBeginBody or Style/EmptyLinesAroundMethodBody can be used for this purpose.

Examples:

# good

begin
  do_something
rescue
  do_something2
else
  do_something3
ensure
  do_something4
end

# good

def foo
  do_something
rescue
  do_something2
end

# bad

begin
  do_something

rescue

  do_something2

else

  do_something3

ensure

  do_something4
end

# bad

def foo
  do_something

rescue

  do_something2
end

Constant Summary

::RuboCop::Cop::Base - Inherited

EMPTY_OFFENSES, RESTRICT_ON_SEND

::RuboCop::Cop::ConfigurableEnforcedStyle - Included

SYMBOL_TO_STRING_CACHE

::RuboCop::Cop::RangeHelp - Included

BYTE_ORDER_MARK, NOT_GIVEN

EmptyLinesAroundBody - Included

MSG_DEFERRED, MSG_EXTRA, MSG_MISSING

Class Attribute Summary

::RuboCop::Cop::AutoCorrector - Extended

support_autocorrect?

::RuboCop::Cop::Base - Inherited

.gem_requirements, .lint?,
.support_autocorrect?

Returns if class supports autocorrect.
.support_multiple_source?

Override if your cop should be called repeatedly for multiple investigations Between calls to on_new_investigation and on_investigation_end, the result of processed_source will remain constant.

Class Method Summary

::RuboCop::Cop::Base - Inherited

.autocorrect_incompatible_with

List of cops that should not try to autocorrect at the same time as this cop.
.badge

Naming.
.callbacks_needed, .cop_name, .department,
.documentation_url

Returns a url to view this cops documentation online.
.exclude_from_registry

Call for abstract Cop classes.
.inherited,
.joining_forces

Override and return the Force class(es) you need to join.
.match?

Returns true if the cop name or the cop namespace matches any of the given names.
.new,
.requires_gem

Register a version requirement for the given gem name.
.restrict_on_send

::RuboCop::ExcludeLimit - Extended

exclude_limit

Sets up a configuration option to have an exclude limit tracked.
transform

Instance Attribute Summary

::RuboCop::Cop::ConfigurableEnforcedStyle - Included

#detected_style, #detected_style=, #no_acceptable_style?, #style_configured?

::RuboCop::Cop::Base - Inherited

#active_support_extensions_enabled?, #always_autocorrect?, #config, #config_to_allow_offenses, #config_to_allow_offenses=, #contextual_autocorrect?, #processed_source, #string_literals_frozen_by_default?, #target_satisfies_all_gem_version_requirements?

::RuboCop::Cop::AutocorrectLogic - Included

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

Instance Method Summary

EmptyLinesAroundBody - Included

#check, #check_beginning, #check_both, #check_deferred_empty_line, #check_empty_lines_except_namespace, #check_empty_lines_special, #check_ending, #check_line, #check_source, #constant_definition?, #deferred_message, #empty_line_required?, #first_child_requires_empty_line?, #first_empty_line_required_child, #message, #namespace?, #previous_line_ignoring_comments, #valid_body_style?

::RuboCop::Cop::RangeHelp - Included

#add_range, #column_offset_between,
#contents_range

A range containing only the contents of a literal with delimiters (e.g.
#directions,
#effective_column

Returns the column attribute of the range, except if the range is on the first line and there’s a byte order mark at the beginning of that line, in which case 1 is subtracted from the column value.
#final_pos, #move_pos, #move_pos_str, #range_between, #range_by_whole_lines, #range_with_comments, #range_with_comments_and_lines, #range_with_surrounding_comma, #range_with_surrounding_space, #source_range

::RuboCop::Cop::ConfigurableEnforcedStyle - Included

#alternative_style, #alternative_styles, #ambiguous_style_detected,
#conflicting_styles_detected

Alias for ConfigurableEnforcedStyle#no_acceptable_style!.
#correct_style_detected, #no_acceptable_style!, #opposite_style_detected, #style, #style_detected, #style_parameter_name, #supported_styles, #unexpected_style_detected,
#unrecognized_style_detected

Alias for ConfigurableEnforcedStyle#no_acceptable_style!.

::RuboCop::Cop::Base - Inherited

#add_global_offense

Adds an offense that has no particular location.
#add_offense

Adds an offense on the specified range (or node with an expression) Unless that offense is disabled for this range, a corrector will be yielded to provide the cop the opportunity to autocorrect the offense.
#begin_investigation

Called before any investigation.
#callbacks_needed,
#cop_config

Configuration Helpers.
#cop_name, #excluded_file?,
#external_dependency_checksum

This method should be overridden when a cop’s behavior depends on state that lives outside of these locations:
#inspect,
#message

Gets called if no message is specified when calling add_offense or add_global_offense Cops are discouraged to override this; instead pass your message directly.
#name

Alias for Base#cop_name.
#offenses,
#on_investigation_end

Called after all on_…​
#on_new_investigation

Called before all on_…​
#on_other_file

Called instead of all on_…​
#parse

There should be very limited reasons for a Cop to do it’s own parsing.
#parser_engine,
#ready

Called between investigations.
#relevant_file?, #target_rails_version, #target_ruby_version, #annotate, #apply_correction, #attempt_correction,
#callback_argument

Reserved for Cop::Cop.
#complete_investigation

Called to complete an investigation.
#correct, #current_corrector,
#current_offense_locations

Reserved for Commissioner:
#current_offenses, #currently_disabled_lines, #custom_severity, #default_severity, #disable_uncorrectable, #enabled_line?, #file_name_matches_any?, #find_message, #find_severity, #range_for_original, #range_from_node_or_range,
#reset_investigation

Actually private methods.
#use_corrector

::RuboCop::Cop::AutocorrectLogic - Included

#disable_offense, #disable_offense_at_end_of_line, #disable_offense_before_and_after, #disable_offense_with_eol_or_surround_comment, #max_line_length,
#range_by_lines

Expand the given range to include all of any lines it covers.
#range_of_first_line, #range_overlaps_offense?, #string_continuation, #string_continuation?, #surrounding_heredoc, #surrounding_percent_array

::RuboCop::Cop::IgnoredNode - Included

#ignore_node, #ignored_node?, #part_of_ignored_node?, #ignored_nodes

Constructor Details

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

Instance Method Details

#check_body(body, line_of_def_or_kwbegin) (private)

[ GitHub ] 

  


# File 'lib/rubocop/cop/layout/empty_lines_around_exception_handling_keywords.rb', line 81



def check_body(body, line_of_def_or_kwbegin)
  locations = keyword_locations(body)

  locations.each do |loc|
    line = loc.line
    next if line == line_of_def_or_kwbegin || last_body_and_end_on_same_line?(body)

    keyword = loc.source
    # below the keyword
    check_line(style, line, message('after', keyword), &:empty?)
    # above the keyword
    check_line(style, line - 2, message('before', keyword), &:empty?)
  end
end


  








  

    #keyword_locations(node)   (private)
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/empty_lines_around_exception_handling_keywords.rb', line 113



def keyword_locations(node)
  return [] unless node

  case node.type
  when :rescue
    keyword_locations_in_rescue(node)
  when :ensure
    keyword_locations_in_ensure(node)
  else
    []
  end
end


  








  

    #keyword_locations_in_ensure(node)   (private)
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/empty_lines_around_exception_handling_keywords.rb', line 130



def keyword_locations_in_ensure(node)
  ensure_body, = *node
  [
    node.loc.keyword,
    *keyword_locations(ensure_body)
  ]
end


  








  

    #keyword_locations_in_rescue(node)   (private)
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/empty_lines_around_exception_handling_keywords.rb', line 126



def keyword_locations_in_rescue(node)
  [node.loc.else, *node.resbody_branches.map { |body| body.loc.keyword }].compact
end


  








  

    #last_body_and_end_on_same_line?(body)  ⇒ Boolean  (private)
  



  

    
  





  


  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/empty_lines_around_exception_handling_keywords.rb', line 96



def last_body_and_end_on_same_line?(body)
  end_keyword_line = body.parent.loc.end.line
  return body.loc.last_line == end_keyword_line unless body.rescue_type?

  last_body_line = body.else? ? body.loc.else.line : body.resbody_branches.last.loc.line

  last_body_line == end_keyword_line
end


  








  

    #message(location, keyword)   (private)
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/empty_lines_around_exception_handling_keywords.rb', line 105



def message(location, keyword)
  format(MSG, location: location, keyword: keyword)
end


  








  

    #on_block(node)  
  



  

    


Alias for #on_def.



  



  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/empty_lines_around_exception_handling_keywords.rb', line 71



alias on_block on_def


  








  

    #on_def(node)  
    Also known as: #on_defs, #on_block, #on_numblock
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/empty_lines_around_exception_handling_keywords.rb', line 67



def on_def(node)
  check_body(node.body, node.loc.line)
end


  








  

    #on_defs(node)  
  



  

    


Alias for #on_def.



  



  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/empty_lines_around_exception_handling_keywords.rb', line 70



alias on_defs on_def


  








  

    #on_kwbegin(node)  
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/empty_lines_around_exception_handling_keywords.rb', line 74



def on_kwbegin(node)
  body, = *node
  check_body(body, node.loc.line)
end


  








  

    #on_numblock(node)  
  



  

    


Alias for #on_def.



  



  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/empty_lines_around_exception_handling_keywords.rb', line 72



alias on_numblock on_def


  








  

    #style   (private)
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/empty_lines_around_exception_handling_keywords.rb', line 109



def style
  :no_empty_lines
end