Class: RuboCop::Cop::Style::IdenticalConditionalBranches

Inherits:
Cop
  • Object
show all
Includes:
IfNode
Defined in:
lib/rubocop/cop/style/identical_conditional_branches.rb

Overview

This cop checks for identical lines at the end of each branch of a conditional statement.

Examples:

@bad
if condition
  do_x
  do_z
else
  do_y
  do_z
end

@good
if condition
  do_x
else
  do_y
end
do_z

Constant Summary collapse

MSG = 
'Move `%s` out of the conditional.'.freeze

Constants included from Util

Util::ASGN_NODES, Util::BYTE_ORDER_MARK, Util::EQUALS_ASGN_NODES, Util::LITERAL_REGEX, Util::OPERATOR_METHODS, Util::SHORTHAND_ASGN_NODES, Util::STRING_ESCAPES, Util::STRING_ESCAPE_REGEX

Instance Attribute Summary

Attributes inherited from Cop

#config, #corrections, #offenses, #processed_source

Instance Method Summary collapse

Methods included from IfNode

#elsif?, #if_else?, #if_node_parts, #modifier_if?, #ternary?

Methods inherited from Cop

#add_offense, all, #config_to_allow_offenses, #config_to_allow_offenses=, #cop_config, cop_name, #cop_name, cop_type, #correct, #debug?, #details, #display_cop_names?, #display_style_guide?, #excluded_file?, #extra_details?, inherited, #initialize, #join_force?, lint?, match?, #message, non_rails, #parse, qualified_cop_name, #reference_url, #relevant_file?, #style_guide_url, #target_ruby_version

Methods included from Sexp

#s

Methods included from NodePattern::Macros

#def_node_matcher, #def_node_search, #node_search_body

Methods included from AutocorrectLogic

#autocorrect?, #autocorrect_enabled?, #autocorrect_requested?, #support_autocorrect?

Methods included from IgnoredNode

#ignore_node, #ignored_node?, #part_of_ignored_node?

Methods included from Util

begins_its_line?, block_length, comment_line?, directions, double_quotes_acceptable?, double_quotes_required?, effective_column, ends_its_line?, first_part_of_call_chain, interpret_string_escapes, line_range, move_pos, numeric_range_size, on_node, operator?, parentheses?, parenthesized_call?, range_with_surrounding_comma, range_with_surrounding_space, source_range, strip_quotes, to_string_literal, to_symbol_literal, within_node?

Methods included from PathUtil

absolute?, match_path?, relative_path

Constructor Details

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

Instance Method Details

#on_case(node) ⇒ Object 



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# File 'lib/rubocop/cop/style/identical_conditional_branches.rb', line 44

def on_case(node)
  return unless node.loc.else
  _condition, *when_branches, else_branch = *node
  return unless else_branch # empty else
  when_branches = expand_when_branches(when_branches)

  check_node(when_branches.push(else_branch))
end

#on_if(node) ⇒ Object 



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# File 'lib/rubocop/cop/style/identical_conditional_branches.rb', line 32

def on_if(node)
  return if elsif?(node)
  _condition, if_branch, else_branch = *node
  branches = expand_elses(else_branch).unshift(if_branch)

  # return if any branch is empty. An empty branch can be an `if`
  # without an `else`, or a branch that contains only comments.
  return if branches.any?(&:nil?)

  check_node(branches)
end