Class: RuboCop::Cop::Style::MultilineBlockChain

Inherits:
Base
  • Object
show all
Includes:
RangeHelp
Defined in:
lib/rubocop/cop/style/multiline_block_chain.rb

Overview

Checks for chaining of a block after another block that spans multiple lines.

Examples:


# bad
Thread.list.select do |t|
  t.alive?
end.map do |t|
  t.object_id
end

# good
alive_threads = Thread.list.select do |t|
  t.alive?
end
alive_threads.map do |t|
  t.object_id
end

Constant Summary collapse

MSG = 
'Avoid multi-line chains of blocks.'

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_block(node) ⇒ Object Also known as: on_numblock 



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# File 'lib/rubocop/cop/style/multiline_block_chain.rb', line 30

def on_block(node)
  node.send_node.each_node(:send, :csend) do |send_node|
    receiver = send_node.receiver

    next unless (receiver&.block_type? || receiver&.numblock_type?) && receiver&.multiline?

    range = range_between(receiver.loc.end.begin_pos, node.send_node.source_range.end_pos)

    add_offense(range)

    # Done. If there are more blocks in the chain, they will be
    # found by subsequent calls to on_block.
    break
  end
end