The locale names for which plural rules are defined.

@spec known_locale_names() :: [Cldr.Locale.locale_name(), ...]

The configured locales for which plural rules are defined.

Returns the intersection of Literature.known_locale_names/0 and the locales for which Cardinal plural rules are defined.

There are many Cldr locales which don't have their own plural rules so this list is the intersection of Cldr's configured locales and those that have rules.

@spec plural_rule(
  Cldr.Math.number_or_decimal(),
  Cldr.Locale.locale_name() | Cldr.LanguageTag.t(),
  atom() | pos_integer()
) :: Cldr.Number.PluralRule.plural_type() | {:error, {module(), String.t()}}

Return the plural key for a given number in a given locale

Returns which plural key (:zero, :one, :two, :few, :many or :other) a given number fits into within the context of a given locale.

Note that these key names should not be interpreted literally. For example, the key returned from Cldr.Number.Ordinal.plural_rule(0, "en") is actually :other, not :zero.

This key can then be used to format a number, date, time, unit, list or other content in a plural-sensitive way.

Arguments

• number is any integer, float or Decimal

• locale is any locale returned by Cldr.Locale.new!/2 or any locale_name returned by Literature.known_locale_names/0

• rounding is one of [:down, :up, :ceiling, :floor, :half_even, :half_up, :half_down]. The default is :half_even.

Examples

iex> Literature.Number.Cardinal.plural_rule 0, "fr"
:one

iex> Literature.Number.Cardinal.plural_rule 0, "en"
:other

@spec plural_rules() :: %{
  required(Cldr.Locale.locale_name()) => [
    {plural_type :: Cldr.Number.PluralRule.plural_type(),
     plural_rules :: [Cldr.Number.PluralRule.plural_rule(), ...]},
    ...
  ]
}

Returns all the plural rules defined in CLDR.

@spec plural_rules_for(Cldr.Locale.locale_name() | Cldr.LanguageTag.t()) :: [
  {atom(), list()},
  ...
]

Return the plural rules for a locale.

Arguments

• locale is any locale returned by Literature.Locale.new!/1 or any locale_name returned by Literature.known_locale_names/0

The rules are returned in AST form after parsing.

@spec pluralize(
  Cldr.Math.number_or_decimal() | Range.t(),
  Cldr.Locale.locale_reference(),
  %{}
) :: any()

Pluralize a number using cardinal plural rules and a substitution map.

Arguments

• number is an integer, float or Decimal

• locale is any locale returned by Literature.Locale.new!/1 or any locale_name returned by Literature.known_locale_names/0

• substitutions is a map that maps plural keys to a string. The valid substitution keys are :zero, :one, :two, :few, :many and :other.

See also Literature.Number.Cardinal.Cardinal.plural_rule/3.

Examples

iex> Literature.Number.Cardinal.pluralize 1, "en", %{one: "one"}
"one"

iex> Literature.Number.Cardinal.pluralize 2, "en", %{one: "one"}
nil

iex> Literature.Number.Cardinal.pluralize 2, "en", %{one: "one", two: "two", other: "other"}
"other"

iex> Literature.Number.Cardinal.pluralize 22, "en", %{one: "one", two: "two", other: "other"}
"other"

iex> Literature.Number.Cardinal.pluralize Decimal.new(1), "en", %{one: "one"}
"one"

iex> Literature.Number.Cardinal.pluralize Decimal.new(2), "en", %{one: "one"}
nil

iex> Literature.Number.Cardinal.pluralize Decimal.new(2), "en", %{one: "one", two: "two"}
nil

iex> Literature.Number.Cardinal.pluralize 1..10, "ar", %{one: "one", few: "few", other: "other"}
"few"

iex> Literature.Number.Cardinal.pluralize 1..10, "en", %{one: "one", few: "few", other: "other"}
"other"