class ActiveSupport::Inflector::Inflections

Experimental RBS support (using type sampling data from the type_fusion project). 

# sig/active_support/inflector/inflections.rbs

class ActiveSupport::Inflector::Inflections
  def self.instance_or_fallback: (Symbol locale) -> ActiveSupport::Inflector::Inflections
end

before any of the rules that may already have been loaded.
singularization rules that is runs. This guarantees that your rules run
rule for cactus will now be the first of the pluralization and
New rules are added at the top. So in the example above, the irregular
end
inflect.uncountable ‘equipment’
inflect.irregular ‘cactus’, ‘cacti’
inflect.singular /^(ox)en/i, ‘1’
inflect.plural /^(ox)$/i, ‘12en’
ActiveSupport::Inflector.inflections(:en) do |inflect|
default locale is :en. Only rules for English are provided.
an optional locale, rules for other languages can be specified. The
which can then be used to specify additional inflection rules. If passed
A singleton instance of this class is yielded by Inflector.inflections,

def self.instance(locale = :en) 

def self.instance(locale = :en)
  @__instance__[locale] ||= new
end

def self.instance_or_fallback(locale)

Experimental RBS support (using type sampling data from the type_fusion project). 

def self.instance_or_fallback: (Symbol locale) -> ActiveSupport::Inflector::Inflections

This signature was generated using 12 samples from 1 application. 

def self.instance_or_fallback(locale)
  I18n.fallbacks[locale].each do |k|
    return @__instance__[k] if @__instance__.key?(k)
  end
  instance(locale)
end

def acronym(word)

camelize 'mcdonald' # => 'McDonald'
underscore 'McDonald' # => 'mcdonald'
acronym 'McDonald'

camelize 'restful_controller' # => 'RESTfulController'
camelize 'restful' # => 'RESTful'
titleize 'RESTfulController' # => 'RESTful Controller'
underscore 'RESTfulController' # => 'restful_controller'
underscore 'RESTful' # => 'restful'
acronym 'RESTful'

restriction is that the word must begin with a capital letter.
otherwise needs to maintain a non-standard capitalization. The only
+acronym+ may be used to specify any word that contains an acronym or

camelize(pluralize('api')) # => 'APIs'
acronym 'APIs'

camelize(pluralize('api')) # => 'Apis'
acronym 'API'

form as an acronym as well:
pluralized result. To work around this, you must specify the pluralized
recognized, since the acronym will not occur as a delimited unit in the
Note: Acronyms that are passed to +pluralize+ will no longer be

underscore 'HTTPS' # => 'https'
camelize 'https' # => 'HTTPS'
acronym 'HTTPS'

underscore 'HTTPS' # => 'http_s', not 'https'
camelize 'https' # => 'Https', not 'HTTPs'
camelize 'my_http_delimited' # => 'MyHTTPDelimited'
acronym 'HTTP'

another word for conversions to recognize it:
The acronym, however, must occur as a delimited unit and not be part of

underscore 'MyHTML' # => 'my_html'
camelize 'html' # => 'HTML'
titleize 'html' # => 'HTML'
acronym 'HTML'

into a non-delimited single lowercase word when passed to +underscore+.
the acronym when titleized or humanized, and will convert the acronym
+titleize+. A camelized string that contains the acronym will maintain
will retain the acronym when passed to +camelize+, +humanize+, or
in a camelized string. An underscore string that contains the acronym
Specifies a new acronym. An acronym must be specified as it will appear 
def acronym(word)
  @acronyms[word.downcase] = word
  define_acronym_regex_patterns
end

def clear(scope = :all)

clear :plurals
clear :all

:humans, :acronyms.
options are: :plurals, :singulars, :uncountables,
:all). Give the scope as a symbol of the inflection type, the
Clears the loaded inflections within a given scope (default is 
def clear(scope = :all)
  case scope
  when :all
    clear(:acronyms)
    clear(:plurals)
    clear(:singulars)
    clear(:uncountables)
    clear(:humans)
  when :acronyms
    @acronyms = {}
    define_acronym_regex_patterns
  when :uncountables
    @uncountables = Uncountables.new
  when :plurals, :singulars, :humans
    instance_variable_set "@#{scope}", []
  end
end

def define_acronym_regex_patterns 

def define_acronym_regex_patterns
  @acronym_regex             = @acronyms.empty? ? /(?=a)b/ : /#{@acronyms.values.join("|")}/
  @acronyms_camelize_regex   = /^(?:#{@acronym_regex}(?=\b|[A-Z_])|\w)/
  @acronyms_underscore_regex = /(?:(?<=([A-Za-z\d]))|\b)(#{@acronym_regex})(?=\b|[^a-z])/
end

def human(rule, replacement)

human 'legacy_col_person_name', 'Name'
human /_cnt$/i, '\1_count'

'The name', not 'the_name').
string is used, the human form should be specified as desired (example:
the normal humanize formatting is called after the replacement. When a
by a string mapping. When using a regular expression based replacement,
Specifies a humanized form of a string by a regular expression rule or 
def human(rule, replacement)
  @humans.prepend([rule, replacement])
end

def initialize 

def initialize
  @plurals, @singulars, @uncountables, @humans, @acronyms = [], [], Uncountables.new, [], {}
  define_acronym_regex_patterns
end

def initialize_dup(orig) # :nodoc:

:nodoc:
Private, for the test suite. 
def initialize_dup(orig) # :nodoc:
  %w(plurals singulars uncountables humans acronyms).each do |scope|
    instance_variable_set("@#{scope}", orig.public_send(scope).dup)
  end
  define_acronym_regex_patterns
end

def irregular(singular, plural)

irregular 'person', 'people'
irregular 'cactus', 'cacti'

plural form.
regular expressions. You simply pass the irregular in singular and
singularization at the same time. This can only be used for strings, not
Specifies a new irregular that applies to both pluralization and 
def irregular(singular, plural)
  @uncountables.delete(singular)
  @uncountables.delete(plural)
  s0 = singular[0]
  srest = singular[1..-1]
  p0 = plural[0]
  prest = plural[1..-1]
  if s0.upcase == p0.upcase
    plural(/(#{s0})#{srest}$/i, '\1' + prest)
    plural(/(#{p0})#{prest}$/i, '\1' + prest)
    singular(/(#{s0})#{srest}$/i, '\1' + srest)
    singular(/(#{p0})#{prest}$/i, '\1' + srest)
  else
    plural(/#{s0.upcase}(?i)#{srest}$/,   p0.upcase   + prest)
    plural(/#{s0.downcase}(?i)#{srest}$/, p0.downcase + prest)
    plural(/#{p0.upcase}(?i)#{prest}$/,   p0.upcase   + prest)
    plural(/#{p0.downcase}(?i)#{prest}$/, p0.downcase + prest)
    singular(/#{s0.upcase}(?i)#{srest}$/,   s0.upcase   + srest)
    singular(/#{s0.downcase}(?i)#{srest}$/, s0.downcase + srest)
    singular(/#{p0.upcase}(?i)#{prest}$/,   s0.upcase   + srest)
    singular(/#{p0.downcase}(?i)#{prest}$/, s0.downcase + srest)
  end
end

def plural(rule, replacement)

the rule.
always be a string that may include references to the matched data from
either be a string or a regular expression. The replacement should
Specifies a new pluralization rule and its replacement. The rule can 
def plural(rule, replacement)
  @uncountables.delete(rule) if rule.is_a?(String)
  @uncountables.delete(replacement)
  @plurals.prepend([rule, replacement])
end

def singular(rule, replacement)

the rule.
always be a string that may include references to the matched data from
either be a string or a regular expression. The replacement should
Specifies a new singularization rule and its replacement. The rule can 
def singular(rule, replacement)
  @uncountables.delete(rule) if rule.is_a?(String)
  @uncountables.delete(replacement)
  @singulars.prepend([rule, replacement])
end

def uncountable(*words)

uncountable %w( money information rice )
uncountable 'money', 'information'
uncountable 'money'

Specifies words that are uncountable and should not be inflected. 
def uncountable(*words)
  @uncountables.add(words)
end