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Class: RuboCop::Cop::Layout::MultilineAssignmentLayout

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, ::RuboCop::Cop::RangeHelp, ::RuboCop::Cop::ConfigurableEnforcedStyle, ::RuboCop::Cop::CheckAssignment, ::RuboCop::Cop::Base, ::RuboCop::Cop::AutocorrectLogic, ::RuboCop::Cop::IgnoredNode, ::RuboCop::Util, RuboCop::AST::Sexp
Inherits: RuboCop::Cop::Base
Defined in: lib/rubocop/cop/layout/multiline_assignment_layout.rb

Overview

Checks whether the multiline assignments have a newline after the assignment operator.

Examples:

EnforcedStyle: new_line (default)

# bad
foo = if expression
  'bar'
end

# good
foo =
  if expression
    'bar'
  end

# good
foo =
  begin
    compute
  rescue => e
    nil
  end

EnforcedStyle: same_line

# good
foo = if expression
  'bar'
end

SupportedTypes: ['block', 'case', 'class', 'if', 'kwbegin', 'module'] (default)

# good
foo =
  if expression
    'bar'
  end

# good
foo =
  [1].map do |i|
    i + 1
  end

SupportedTypes: ['block']

# good
foo = if expression
  'bar'
end

# good
foo =
  [1].map do |i|
    'bar' * i
  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

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

::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::CheckAssignment - Included

#on_and_asgn

Alias for CheckAssignment#on_lvasgn.
#on_casgn

Alias for CheckAssignment#on_lvasgn.
#on_cvasgn

Alias for CheckAssignment#on_lvasgn.
#on_gvasgn

Alias for CheckAssignment#on_lvasgn.
#on_ivasgn

Alias for CheckAssignment#on_lvasgn.
#on_lvasgn,
#on_masgn

Alias for CheckAssignment#on_lvasgn.
#on_op_asgn

Alias for CheckAssignment#on_lvasgn.
#on_or_asgn

Alias for CheckAssignment#on_lvasgn.
#on_send, #extract_rhs

::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_gem_version

Returns a gems locked versions (i.e.
#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, #heredoc_range, #max_line_length, #multiline_ranges, #multiline_string?,
#range_by_lines

Expand the given range to include all of any lines it covers.
#range_of_first_line, #range_overlaps_offense?, #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_assignment(node, rhs)

[ GitHub ] 

  


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



def check_assignment(node, rhs)
  return if node.send_type? && node.loc.operator&.source != '='
  return unless rhs
  return unless supported_types.include?(rhs.type)
  return if rhs.single_line?

  check_by_enforced_style(node, rhs)
end


  








  

    #check_by_enforced_style(node, rhs)  
  

  [ GitHub ]


  

  


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



def check_by_enforced_style(node, rhs)
  case style
  when :new_line
    check_new_line_offense(node, rhs)
  when :same_line
    check_same_line_offense(node, rhs)
  end
end


  








  

    #check_new_line_offense(node, rhs)  
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/multiline_assignment_layout.rb', line 90



def check_new_line_offense(node, rhs)
  return unless same_line?(node.loc.operator, rhs)

  add_offense(node, message: NEW_LINE_OFFENSE) do |corrector|
    corrector.insert_after(node.loc.operator, "\n")
  end
end


  








  

    #check_same_line_offense(node, rhs)  
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/multiline_assignment_layout.rb', line 98



def check_same_line_offense(node, rhs)
  return unless node.loc.operator.line != rhs.first_line

  add_offense(node, message: SAME_LINE_OFFENSE) do |corrector|
    range = range_between(
      node.loc.operator.end_pos, extract_rhs(node).source_range.begin_pos
    )
    corrector.replace(range, ' ')
  end
end


  








  

    #supported_types   (private)
  

  [ GitHub ]


  

  


# File 'lib/rubocop/cop/layout/multiline_assignment_layout.rb', line 111



def supported_types
  @supported_types ||= cop_config['SupportedTypes'].map(&:to_sym)
end