Class: RuboCop::Cop::Style::FormatStringToken

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

Overview

Use a consistent style for named format string tokens.

Note: ‘unannotated` style cop only works for strings which are passed as arguments to those methods: `sprintf`, `format`, `%`. The reason is that unannotated format is very similar to encoded URLs or Date/Time formatting strings.

Examples:

EnforcedStyle: annotated (default)


# bad
format('%{greeting}', greeting: 'Hello')
format('%s', 'Hello')

# good
format('%<greeting>s', greeting: 'Hello')

EnforcedStyle: template


# bad
format('%<greeting>s', greeting: 'Hello')
format('%s', 'Hello')

# good
format('%{greeting}', greeting: 'Hello')

EnforcedStyle: unannotated


# bad
format('%<greeting>s', greeting: 'Hello')
format('%{greeting}', 'Hello')

# good
format('%s', 'Hello')

Constant Summary collapse

FIELD_CHARACTERS = 
Regexp.union(%w[A B E G X a b c d e f g i o p s u x])
FORMAT_STRING_METHODS = 
%i[sprintf format %].freeze
STYLE_PATTERNS = 
{
  annotated: /(?<token>%<[^>]+>#{FIELD_CHARACTERS})/,
  template: /(?<token>%\{[^\}]+\})/,
  unannotated: /(?<token>%#{FIELD_CHARACTERS})/
}.freeze

Constants included from Util

Util::ASGN_NODES, 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 included from ConfigurableEnforcedStyle

#alternative_style, #alternative_styles, #ambiguous_style_detected, #correct_style_detected, #detected_style, #detected_style=, #no_acceptable_style!, #no_acceptable_style?, #opposite_style_detected, #style, #style_detected, #style_parameter_name, #supported_styles, #unexpected_style_detected

Methods inherited from Cop

#add_offense, all, autocorrect_incompatible_with, 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?, #messages, non_rails, #parse, qualified_cop_name, #relevant_file?, #target_rails_version, #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?, comment_line?, double_quotes_required?, escape_string, first_part_of_call_chain, interpret_string_escapes, line_range, needs_escaping?, on_node, operator?, parentheses?, same_line?, to_string_literal, to_supported_styles, tokens

Methods included from PathUtil

absolute?, match_path?, pwd, relative_path, reset_pwd, smart_path

Constructor Details

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

Instance Method Details

#on_str(node) ⇒ Object 



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# File 'lib/rubocop/cop/style/format_string_token.rb', line 53

def on_str(node)
  return if placeholder_argument?(node)
  return if node.each_ancestor(:xstr, :regexp).any?

  tokens(node) do |detected_style, token_range|
    if detected_style == style ||
       unannotated_format?(node, detected_style)
      correct_style_detected
    else
      style_detected(detected_style)
      add_offense(node, location: token_range,
                        message: message(detected_style))
    end
  end
end