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Class: RuboCop::Cop::Layout::EmptyLineAfterMultilineCondition

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:
Inherits: RuboCop::Cop::Base
Defined in: lib/rubocop/cop/layout/empty_line_after_multiline_condition.rb

Overview

Enforces empty line after multiline condition.

Examples:

# bad
if multiline &&
  condition
  do_something
end

# good
if multiline &&
  condition

  do_something
end

# bad
case x
when foo,
  bar
  do_something
end

# good
case x
when foo,
  bar

  do_something
end

# bad
begin
  do_something
rescue FooError,
  BarError
  handle_error
end

# good
begin
  do_something
rescue FooError,
  BarError

  handle_error
end

Constant Summary

::RuboCop::Cop::Base - Inherited

EMPTY_OFFENSES, RESTRICT_ON_SEND

::RuboCop::Cop::RangeHelp - Included

BYTE_ORDER_MARK, NOT_GIVEN

Class Attribute Summary

::RuboCop::Cop::AutoCorrector - Extended

::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 an 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

Instance Method Summary

::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::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

::RuboCop::Cop::IgnoredNode - Included

Constructor Details

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

Instance Method Details

#autocorrect(node) (private)

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/empty_line_after_multiline_condition.rb', line 127

def autocorrect(node)
  lambda do |corrector|
    range = range_by_whole_lines(node.source_range)
    corrector.insert_after(range, "\n")
  end
end

#check_condition(condition) (private)

[ GitHub ]

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

def check_condition(condition)
  return unless condition.multiline?
  return if next_line_empty?(condition.last_line)

  add_offense(condition, &autocorrect(condition))
end

#multiline_rescue_exceptions?(exception_nodes) ⇒ Boolean (private)

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/empty_line_after_multiline_condition.rb', line 120

def multiline_rescue_exceptions?(exception_nodes)
  return false if exception_nodes.size <= 1

  first, *_rest, last = *exception_nodes
  first.first_line != last.last_line
end

#multiline_when_condition?(when_node) ⇒ Boolean (private)

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/empty_line_after_multiline_condition.rb', line 116

def multiline_when_condition?(when_node)
  when_node.conditions.first.first_line != when_node.conditions.last.last_line
end

#next_line_empty?(line) ⇒ Boolean (private)

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/empty_line_after_multiline_condition.rb', line 112

def next_line_empty?(line)
  processed_source[line].blank?
end

#on_case(node)

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/empty_line_after_multiline_condition.rb', line 82

def on_case(node)
  node.when_branches.each do |when_node|
    last_condition = when_node.conditions.last

    next if !multiline_when_condition?(when_node) ||
            next_line_empty?(last_condition.last_line)

    add_offense(when_node, &autocorrect(last_condition))
  end
end

#on_if(node)

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/empty_line_after_multiline_condition.rb', line 60

def on_if(node)
  return if node.ternary?

  if node.modifier_form?
    check_condition(node.condition) if node.right_sibling
  else
    check_condition(node.condition)
  end
end

#on_rescue(node)

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/empty_line_after_multiline_condition.rb', line 93

def on_rescue(node)
  node.resbody_branches.each do |resbody|
    rescued_exceptions = resbody.exceptions
    next if !multiline_rescue_exceptions?(rescued_exceptions) ||
            next_line_empty?(rescued_exceptions.last.last_line)

    add_offense(resbody, &autocorrect(rescued_exceptions.last))
  end
end

#on_until(node)

Alias for #on_while.

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/empty_line_after_multiline_condition.rb', line 73

alias on_until on_while

#on_until_post(node)

Alias for #on_while_post.

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/empty_line_after_multiline_condition.rb', line 80

alias on_until_post on_while_post

#on_while(node) Also known as: #on_until

[ GitHub ]

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

def on_while(node)
  check_condition(node.condition)
end

#on_while_post(node) Also known as: #on_until_post

[ GitHub ]

  
# File 'lib/rubocop/cop/layout/empty_line_after_multiline_condition.rb', line 75

def on_while_post(node)
  return unless node.right_sibling

  check_condition(node.condition)
end