Class: RuboCop::Cop::Style::IfInsideElse

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

Overview

If the ‘else` branch of a conditional consists solely of an `if` node, it can be combined with the `else` to become an `elsif`. This helps to keep the nesting level from getting too deep.

Examples:

@good
if condition_a
  action_a
elsif condition_b
  action_b
else
  action_c
end

@bad
if condition_a
  action_a
else
  if condition_b
    action_b
  else
    action_c
  end
end

Constant Summary collapse

MSG = 
'Convert `if` nested inside `else` to `elsif`.'.freeze

Constants included from Util

Util::ASGN_NODES, Util::BYTE_ORDER_MARK, Util::CONDITIONAL_NODES, Util::EQUALS_ASGN_NODES, Util::LITERAL_REGEX, Util::LOGICAL_OPERATOR_NODES, Util::MODIFIER_NODES, Util::OPERATOR_METHODS, Util::SHORTHAND_ASGN_NODES

Instance Attribute Summary

Attributes inherited from Cop

#config, #corrections, #offenses, #processed_source

Instance Method Summary collapse

Methods inherited from Cop

#add_offense, all, badge, #config_to_allow_offenses, #config_to_allow_offenses=, #cop_config, #cop_name, cop_name, #correct, department, #duplicate_location?, #excluded_file?, #find_location, #highlights, inherited, #initialize, #join_force?, lint?, match?, #message, #messages, non_rails, #parse, qualified_cop_name, #relevant_file?, #target_ruby_version

Methods included from AST::Sexp

#s

Methods included from NodePattern::Macros

#def_node_matcher, #def_node_search, #node_search, #node_search_all, #node_search_body, #node_search_first

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?, compatible_external_encoding_for?, directions, double_quotes_acceptable?, double_quotes_required?, effective_column, ends_its_line?, escape_string, first_part_of_call_chain, hard_to_type?, interpret_string_escapes, line_distance, line_range, move_pos, needs_escaping?, numeric_range_size, on_node, operator?, parentheses?, parenthesized_call?, preceed?, range_between, range_with_surrounding_comma, range_with_surrounding_space, same_line?, source_range, strip_quotes, stripped_source_upto, to_string_literal, to_supported_styles, 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_if(node) ⇒ Object 



33
34
35
36
37
38
39
40
41
 
# File 'lib/rubocop/cop/style/if_inside_else.rb', line 33

def on_if(node)
  return if node.ternary? || node.unless?

  else_branch = node.else_branch

  return unless else_branch && else_branch.if_type? && else_branch.if?

  add_offense(else_branch, :keyword)
end