123456789_123456789_123456789_123456789_123456789_

Class: RuboCop::Cop::Style::MultilineMemoization

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/style/multiline_memoization.rb

Overview

Checks expressions wrapping styles for multiline memoization.

Examples:

EnforcedStyle: keyword (default)

# bad
foo ||= (
  bar
  baz
)

# good
foo ||= begin
  bar
  baz
end

EnforcedStyle: braces

# bad
foo ||= begin
  bar
  baz
end

# good
foo ||= (
  bar
  baz
)

Constant Summary

::RuboCop::Cop::Base - Inherited

EMPTY_OFFENSES, RESTRICT_ON_SEND

::RuboCop::Cop::Alignment - Included

SPACE

::RuboCop::Cop::ConfigurableEnforcedStyle - Included

SYMBOL_TO_STRING_CACHE

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::ConfigurableEnforcedStyle - Included

::RuboCop::Cop::Alignment - Included

::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

#bad_rhs?(rhs) ⇒ Boolean (private)

[ GitHub ]

  
# File 'lib/rubocop/cop/style/multiline_memoization.rb', line 62

def bad_rhs?(rhs)
  return false unless rhs.multiline?

  if style == :keyword
    rhs.begin_type?
  else
    rhs.kwbegin_type?
  end
end

#keyword_autocorrect(node, corrector) (private)

[ GitHub ]

  
# File 'lib/rubocop/cop/style/multiline_memoization.rb', line 72

def keyword_autocorrect(node, corrector)
  node_buf = node.source_range.source_buffer
  corrector.replace(node.loc.begin, keyword_begin_str(node, node_buf))
  corrector.replace(node.loc.end, keyword_end_str(node, node_buf))
end

#keyword_begin_str(node, node_buf) (private)

[ GitHub ]

  
# File 'lib/rubocop/cop/style/multiline_memoization.rb', line 78

def keyword_begin_str(node, node_buf)
  if node_buf.source[node.loc.begin.end_pos] == "\n"
    'begin'
  else
    "begin\n#{' ' * (node.loc.column + configured_indentation_width)}"
  end
end

#keyword_end_str(node, node_buf) (private)

[ GitHub ]

  
# File 'lib/rubocop/cop/style/multiline_memoization.rb', line 86

def keyword_end_str(node, node_buf)
  if /[^\s)]/.match?(node_buf.source_line(node.loc.end.line))
    "\n#{' ' * node.loc.column}end"
  else
    'end'
  end
end

#message(_node)

[ GitHub ]

  
# File 'lib/rubocop/cop/style/multiline_memoization.rb', line 56

def message(_node)
  style == :braces ? BRACES_MSG : KEYWORD_MSG
end

#on_or_asgn(node)

[ GitHub ]

  
# File 'lib/rubocop/cop/style/multiline_memoization.rb', line 41

def on_or_asgn(node)
  _lhs, rhs = *node

  return unless bad_rhs?(rhs)

  add_offense(node.source_range) do |corrector|
    if style == :keyword
      keyword_autocorrect(rhs, corrector)
    else
      corrector.replace(rhs.loc.begin, '(')
      corrector.replace(rhs.loc.end, ')')
    end
  end
end