Class: RuboCop::Cop::Style::NestedTernaryOperator

Inherits:
Base
  • Object
show all
Extended by:
AutoCorrector
Defined in:
lib/rubocop/cop/style/nested_ternary_operator.rb

Overview

This cop checks for nested ternary op expressions.

Examples:

# bad
a ? (b ? b1 : b2) : a2

# good
if a
  b ? b1 : b2
else
  a2
end

Constant Summary collapse

MSG = 
'Ternary operators must not be nested. Prefer `if` or `else` ' \
'constructs instead.'

Constants inherited from Base

Base::RESTRICT_ON_SEND

Instance Attribute Summary

Attributes inherited from Base

#config, #processed_source

Instance Method Summary collapse

Methods included from AutoCorrector

support_autocorrect?

Methods inherited from Base

#add_global_offense, #add_offense, autocorrect_incompatible_with, badge, #callbacks_needed, callbacks_needed, #config_to_allow_offenses, #config_to_allow_offenses=, #cop_config, #cop_name, cop_name, department, documentation_url, exclude_from_registry, #excluded_file?, #external_dependency_checksum, inherited, #initialize, joining_forces, lint?, match?, #message, #offenses, #on_investigation_end, #on_new_investigation, #on_other_file, #ready, #relevant_file?, 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?, #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_if(node) ⇒ Object 



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# File 'lib/rubocop/cop/style/nested_ternary_operator.rb', line 24

def on_if(node)
  return unless node.ternary?

  node.each_descendant(:if).select(&:ternary?).each do |nested_ternary|
    add_offense(nested_ternary) do |corrector|
      if_node = if_node(nested_ternary)

      corrector.replace(if_node, <<~RUBY.chop)
        if #{if_node.condition.source}
          #{remove_parentheses(if_node.if_branch.source)}
        else
          #{if_node.else_branch.source}
        end
      RUBY
    end
  end
end