Class: RuboCop::Cop::Utils::FormatString

Inherits:
Object
  • Object
show all
Defined in:
lib/rubocop/cop/utils/format_string.rb

Overview

Parses Kernel#sprintf format strings.

Defined Under Namespace

Classes: FormatSequence

Constant Summary collapse

DIGIT_DOLLAR =

Escaping the ‘#` in `INTERPOLATION` and `TEMPLATE_NAME` is necessary to avoid a bug in Ruby 3.2.0 See: bugs.ruby-lang.org/issues/19379

/(?<arg_number>\d+)\$/.freeze
INTERPOLATION = 
/\#\{.*?\}/.freeze
FLAG = 
/[ #0+-]|#{DIGIT_DOLLAR}/.freeze
NUMBER_ARG = 
/\*#{DIGIT_DOLLAR}?/.freeze
NUMBER = 
/\d+|#{NUMBER_ARG}|#{INTERPOLATION}/.freeze
WIDTH = 
/(?<width>#{NUMBER})/.freeze
PRECISION = 
/\.(?<precision>#{NUMBER}?)/.freeze
TYPE = 
/(?<type>[bBdiouxXeEfgGaAcps])/.freeze
NAME = 
/<(?<name>\w+)>/.freeze
TEMPLATE_NAME = 
/(?<!\#)\{(?<name>\w+)\}/.freeze
SEQUENCE = 
/
    % (?<type>%)
  | % (?<flags>#{FLAG}*)
    (?:
      (?: #{WIDTH}? #{PRECISION}? #{NAME}?
        | #{WIDTH}? #{NAME} #{PRECISION}?
        | #{NAME} (?<more_flags>#{FLAG}*) #{WIDTH}? #{PRECISION}?
      ) #{TYPE}
      | #{WIDTH}? #{PRECISION}? #{TEMPLATE_NAME}
    )
/x.freeze

Instance Method Summary collapse

Constructor Details

#initialize(string) ⇒ FormatString

Returns a new instance of FormatString.



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# File 'lib/rubocop/cop/utils/format_string.rb', line 94

def initialize(string)
  @source = string
end

Instance Method Details

#format_sequences ⇒ Object 



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# File 'lib/rubocop/cop/utils/format_string.rb', line 98

def format_sequences
  @format_sequences ||= parse
end

#max_digit_dollar_num ⇒ Object 



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# File 'lib/rubocop/cop/utils/format_string.rb', line 110

def max_digit_dollar_num
  format_sequences.map(&:max_digit_dollar_num).max
end

#named_interpolation? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rubocop/cop/utils/format_string.rb', line 106

def named_interpolation?
  format_sequences.any?(&:name)
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rubocop/cop/utils/format_string.rb', line 102

def valid?
  !mixed_formats?
end
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