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

Returns a list of all the locale names defined in the CLDR repository.

Note that not necessarily all of these locales are available since functions are only generated for configured locales which is most cases will be a subset of locales defined in CLDR.

See also: requested_locales/1 and known_locales/1

@spec available_locale_name?(Cldr.Locale.locale_name() | Cldr.LanguageTag.t()) ::
  boolean()

Returns a boolean indicating if the specified locale is available in CLDR.

The return value depends on whether the locale is defined in the CLDR repository. It does not necessarily mean the locale is configured for Cldr. See also Cldr.known_locale_name?/2.

Arguments

• locale is any valid locale name returned by Cldr.known_locale_names/1

Examples

iex> Cldr.available_locale_name?(:"en-AU")
true

iex> Cldr.available_locale_name?(:"en-SA")
false

Returns the configured default backend module.

The default backend can be set with Cldr.put_default_backend/1.

Alternatively the default backend may be configured in config.exs under the ex_cldr key as follows:

config :ex_cldr,
  default_backend: <backend_module>

Important Note

If this function is called and no default backend is configured an exception will be raised.

Returns the configured global default locale.

The default locale can be set with Cldr.put_default_locale/1.

Alternatively the default locale may be configured in config.exs under the ex_cldr key as follows:

config :ex_cldr,
  default_locale: <locale_name>

Returns

• The default locale or

• Raises an exception if no default backend is configured

Notes

Cldr.default_locale/0 returns the system-wide default locale.

Example

iex> Cldr.default_locale()
%Cldr.LanguageTag{
  backend: TestBackend.Cldr,
  canonical_locale_name: "en-001",
  cldr_locale_name: :"en-001",
  language_subtags: [],
  extensions: %{},
  gettext_locale_name: "en",
  language: "en",
  locale: %{},
  private_use: [],
  rbnf_locale_name: :en,
  requested_locale_name: "en-001",
  script: :Latn,
  territory: :"001",
  transform: %{},
  language_variants: []
}

@spec default_locale(backend()) :: Cldr.LanguageTag.t()

Returns the global default locale for a given backend.

Arguments

• backend is any module that includes use Cldr and therefore is a Cldr backend module.

Returns

• The default locale for the backend.

Example

iex> Cldr.default_locale(TestBackend.Cldr)
%Cldr.LanguageTag{
  backend: TestBackend.Cldr,
  canonical_locale_name: "en-001",
  cldr_locale_name: :"en-001",
  language_subtags: [],
  extensions: %{},
  gettext_locale_name: "en",
  language: "en",
  locale: %{},
  private_use: [],
  rbnf_locale_name: :en,
  requested_locale_name: "en-001",
  script: :Latn,
  territory: :"001",
  transform: %{},
  language_variants: []
}

@spec default_script() :: Cldr.Locale.script()

Returns the default script.

Returns

• The default script which is Latn.

@spec default_territory(backend()) :: atom()

Returns the default territory when a locale does not specify one and none can be inferred.

Arguments

• backend is any module that includes use Cldr and therefore is a Cldr backend module. The default is Cldr.default_backend/0

Returns

• The default territory or

• Raises if no argument is supplied and there is no default backend configured

Example

iex> Cldr.default_territory(TestBackend.Cldr)
:"001"

@spec display_name(term(), Keyword.t()) :: String.t()

Return a localised string suitable for presentation purposes for structs that implement the Cldr.LanguageTag.DisplayName protocol.

The Cldr.LanguageTag.DisplayName protocol is implemented in this library for t:Cldr.LanguageTag.t.

Other CLDR-related libraries implement the protocol for the types they support such as t:Cldr.Unit and t:Cldr.Currency.

@spec ellipsis(String.t() | [String.t()], backend(), Keyword.t()) ::
  String.t() | {:error, {module(), String.t()}}

Add locale-specific ellipsis to a string.

Arguments

• string is any String.t or a 2-element list of String.t between which the ellipsis is inserted.

• backend is any module that includes use Cldr and therefore is a Cldr backend module. The default is Cldr.default_backend/0. Note that Cldr.default_backend/0 will raise an exception if no :default_backend is configured under the :ex_cldr key in config.exs.

• options is a keyword list of options.

Options

• :locale is any valid locale name returned by Cldr.known_locale_names/1. The default is Cldr.get_locale/0

• :location determines where to place the ellipsis. The options are :after (the default for a single string argument), :between (the default and only valid location for an argument that is a list of two strings) and :before

• :format formats based upon whether the ellipsis is inserted between words or sentences. The valid options are :word or :sentence. The default is :sentence.

Examples

iex> Cldr.ellipsis "And furthermore"
"And furthermore…"

iex> Cldr.ellipsis ["And furthermore", "there is much to be done"], locale: "ja"
"And furthermore…there is much to be done"

iex> Cldr.ellipsis "And furthermore", format: :word
"And furthermore …"

iex> Cldr.ellipsis ["And furthermore", "there is much to be done"], locale: "ja", format: :word
"And furthermore … there is much to be done"

Returns a unicode string representing a flag for a territory.

Options

• territory is any valid territory code returned by Cldr.known_territories/0 or a Cldr.LanguageTag.t

Returns

• A string representing a flag or

• An empty string if the territory is valid but no unicode grapheme is defined. This is true for territories that are aggregate areas such as "the world" which is :001

• {:error, {Cldr.UnknownTerritoryError, message}}

Notes

• If a Cldr.LanguageTag.t is provided, the territory is determined by Cldr.Locale.territory_from_locale/1

Examples

iex> Cldr.flag :AU
"🇦🇺"

iex> Cldr.flag :US
"🇺🇸"

iex> Cldr.flag "UN"
"🇺🇳"

iex> Cldr.flag(:UK)
"🇬🇧"

iex> Cldr.flag(:GB)
"🇬🇧"

iex> Cldr.flag(:UX)
{:error, {Cldr.UnknownTerritoryError, "The territory :UX is unknown"}}

Return the Cldr locale for the current process.

Note that the locale is set per-process. If the locale is not set for the given process then:

• Return the global default locale which is defined under the :ex_cldr key in config.exs

• Or the system-wide default locale which is "en-001"

Note that if there is no locale set for the current process then an error is not returned - a default locale will be returned per the rules above.

Example

iex> Cldr.put_locale(TestBackend.Cldr.Locale.new!("pl"))
iex> Cldr.get_locale()
%Cldr.LanguageTag{
   backend: TestBackend.Cldr,
   canonical_locale_name: "pl",
   cldr_locale_name: :pl,
   extensions: %{},
   language: "pl",
   locale: %{},
   private_use: [],
   rbnf_locale_name: :pl,
   territory: :PL,
   requested_locale_name: "pl",
   script: :Latn,
   transform: %{},
   language_variants: []
 }

@spec known_calendars() :: [atom(), ...]

Returns a list of strings representing the calendars known to Cldr.

Example

iex> Cldr.known_calendars()
[:buddhist, :chinese, :coptic, :dangi, :ethiopic, :ethiopic_amete_alem,
 :gregorian, :hebrew, :indian, :islamic, :islamic_civil, :islamic_rgsa,
 :islamic_tbla, :islamic_umalqura, :japanese, :persian, :roc]

@spec known_currencies() :: [atom(), ...]

Returns a list of strings representing the currencies known to Cldr.

Example

iex> Cldr.known_currencies()
[:ADP, :AED, :AFA, :AFN, :ALK, :ALL, :AMD, :ANG, :AOA, :AOK, :AON, :AOR, :ARA,
 :ARL, :ARM, :ARP, :ARS, :ATS, :AUD, :AWG, :AZM, :AZN, :BAD, :BAM, :BAN, :BBD,
 :BDT, :BEC, :BEF, :BEL, :BGL, :BGM, :BGN, :BGO, :BHD, :BIF, :BMD, :BND, :BOB,
 :BOL, :BOP, :BOV, :BRB, :BRC, :BRE, :BRL, :BRN, :BRR, :BRZ, :BSD, :BTN, :BUK,
 :BWP, :BYB, :BYN, :BYR, :BZD, :CAD, :CDF, :CHE, :CHF, :CHW, :CLE, :CLF, :CLP,
 :CNH, :CNX, :CNY, :COP, :COU, :CRC, :CSD, :CSK, :CUC, :CUP, :CVE, :CYP, :CZK,
 :DDM, :DEM, :DJF, :DKK, :DOP, :DZD, :ECS, :ECV, :EEK, :EGP, :ERN, :ESA, :ESB,
 :ESP, :ETB, :EUR, :FIM, :FJD, :FKP, :FRF, :GBP, :GEK, :GEL, :GHC, :GHS, :GIP,
 :GMD, :GNF, :GNS, :GQE, :GRD, :GTQ, :GWE, :GWP, :GYD, :HKD, :HNL, :HRD, :HRK,
 :HTG, :HUF, :IDR, :IEP, :ILP, :ILR, :ILS, :INR, :IQD, :IRR, :ISJ, :ISK, :ITL,
 :JMD, :JOD, :JPY, :KES, :KGS, :KHR, :KMF, :KPW, :KRH, :KRO, :KRW, :KWD, :KYD,
 :KZT, :LAK, :LBP, :LKR, :LRD, :LSL, :LTL, :LTT, :LUC, :LUF, :LUL, :LVL, :LVR,
 :LYD, :MAD, :MAF, :MCF, :MDC, :MDL, :MGA, :MGF, :MKD, :MKN, :MLF, :MMK, :MNT,
 :MOP, :MRO, :MRU, :MTL, :MTP, :MUR, :MVP, :MVR, :MWK, :MXN, :MXP, :MXV, :MYR,
 :MZE, :MZM, :MZN, :NAD, :NGN, :NIC, :NIO, :NLG, :NOK, :NPR, :NZD, :OMR, :PAB,
 :PEI, :PEN, :PES, :PGK, :PHP, :PKR, :PLN, :PLZ, :PTE, :PYG, :QAR, :RHD, :ROL,
 :RON, :RSD, :RUB, :RUR, :RWF, :SAR, :SBD, :SCR, :SDD, :SDG, :SDP, :SEK, :SGD,
 :SHP, :SIT, :SKK, :SLE, :SLL, :SOS, :SRD, :SRG, :SSP, :STD, :STN, :SUR, :SVC,
 :SYP, :SZL, :THB, :TJR, :TJS, :TMM, :TMT, :TND, :TOP, :TPE, :TRL, :TRY, :TTD,
 :TWD, :TZS, :UAH, :UAK, :UGS, :UGX, :USD, :USN, :USS, :UYI, :UYP, :UYU, :UYW,
 :UZS, :VEB, :VED, :VEF, :VES, :VND, :VNN, :VUV, :WST, :XAF, :XAG, :XAU, :XBA,
 :XBB, :XBC, :XBD, :XCD, :XCG, :XDR, :XEU, :XFO, :XFU, :XOF, :XPD, :XPF, :XPT,
 :XRE, :XSU, :XTS, :XUA, :XXX, :YDD, :YER, :YUD, :YUM, :YUN, :YUR, :ZAL, :ZAR,
 :ZMK, :ZMW, :ZRN, :ZRZ, :ZWD, :ZWL, :ZWR]

@spec known_gettext_locale_name(String.t(), backend()) :: String.t() | false

Returns either the Gettext locale_name in Cldr format or false based upon whether the locale name is configured in Gettext.

Arguments

• locale is any valid locale name returned by Cldr.known_locale_names/1

• backend is any module that includes use Cldr and therefore is a Cldr backend module. The default is Cldr.default_backend!/0. Note that Cldr.default_backend!/0 will raise an exception if no :default_backend is configured under the :ex_cldr key in config.exs.

Examples

iex> Cldr.known_gettext_locale_name("en", TestBackend.Cldr)
"en"

iex> Cldr.known_gettext_locale_name("en-SA", TestBackend.Cldr)
false

@spec known_gettext_locale_name?(String.t(), backend()) :: boolean()

Returns a boolean indicating if the specified locale name is configured and available in Gettext.

Arguments

• locale is any valid locale name returned by Cldr.known_locale_names/1

• backend is any module that includes use Cldr and therefore is a Cldr backend module. The default is Cldr.default_backend!/0. Note that Cldr.default_backend!/0 will raise an exception if no :default_backend is configured under the :ex_cldr key in config.exs.

Examples

iex> Cldr.known_gettext_locale_name?("en", TestBackend.Cldr)
true

iex> Cldr.known_gettext_locale_name?("!!", TestBackend.Cldr)
false

@spec known_gettext_locale_names(backend()) :: [Cldr.Locale.locale_name(), ...] | []

Returns a list of Gettext locale names but in CLDR format with underscore replaced by hyphen in order to facilitate comparisons with Cldr locale names.

Arguments

• backend is any module that includes use Cldr and therefore is a Cldr backend module. The default is Cldr.default_backend!/0. Note that Cldr.default_backend!/0 will raise an exception if no :default_backend is configured under the :ex_cldr key in config.exs.

@spec known_locale_name(Cldr.Locale.locale_name() | String.t(), backend()) ::
  atom() | nil

Returns either the locale_name or false based upon whether the locale name is configured in Cldr.

This is helpful when building a list of or expressions to return the first known locale name from a list.

Arguments

• locale is any valid locale name returned by Cldr.known_locale_names/1

• backend is any module that includes use Cldr and therefore is a Cldr backend module. The default is Cldr.default_backend!/0. Note that Cldr.default_backend!/0 will raise an exception if no :default_backend is configured under the :ex_cldr key in config.exs.

Examples

iex> Cldr.known_locale_name(:"en-AU", TestBackend.Cldr)
:"en-AU"

iex> Cldr.known_locale_name(:"en-SA", TestBackend.Cldr)
nil

@spec known_locale_name?(Cldr.Locale.locale_name(), backend()) :: boolean()

Returns a boolean indicating if the specified locale name is configured and available in Cldr.

Arguments

• locale is any valid locale name returned by Cldr.known_locale_names/1

• backend is any module that includes use Cldr and therefore is a Cldr backend module. The default is Cldr.default_backend!/0. Note that Cldr.default_backend!/0 will raise an exception if no :default_backend is configured under the :ex_cldr key in config.exs.

Examples

iex> Cldr.known_locale_name?(:en, TestBackend.Cldr)
true

iex> Cldr.known_locale_name?(:"!!", TestBackend.Cldr)
false

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

Returns a list of the known locale names.

Arguments

• backend is any module that includes use Cldr and therefore is a Cldr backend module. The default is Cldr.default_backend!/0. Note that Cldr.default_backend!/0 will raise an exception if no :default_backend is configured under the :ex_cldr key in config.exs.

Known locales are those locales which are the subset of all CLDR locales that have been configured for use either directly in the config.exs file or in Gettext.

Returns a list of atoms representing the number systems types known to Cldr.

Arguments

• backend is any module that includes use Cldr and therefore is a Cldr backend module. The default is Cldr.default_backend/0. Note that Cldr.default_backend/0 will raise an exception if no :default_backend is configured under the :ex_cldr key in config.exs.

Example

iex> Cldr.known_number_system_types(TestBackend.Cldr)
[:default, :finance, :native, :traditional]

@spec known_number_systems() :: [atom(), ...]

Returns a list of atoms representing the number systems known to Cldr.

Example

iex> Cldr.known_number_systems()
[:adlm, :ahom, :arab, :arabext, :armn, :armnlow, :bali, :beng, :bhks, :brah,
 :cakm, :cham, :cyrl, :deva, :diak, :ethi, :fullwide, :geor, :gong, :gonm, :grek,
 :greklow, :gujr, :guru, :hanidays, :hanidec, :hans, :hansfin, :hant, :hantfin,
 :hebr, :hmng, :hmnp, :java, :jpan, :jpanfin, :jpanyear, :kali, :kawi, :khmr, :knda, :lana, :lanatham,
 :laoo, :latn, :lepc, :limb, :mathbold, :mathdbl, :mathmono, :mathsanb,
 :mathsans, :mlym, :modi, :mong, :mroo, :mtei, :mymr, :mymrshan, :mymrtlng, :nagm,
 :newa, :nkoo, :olck, :orya, :osma, :rohg, :roman, :romanlow, :saur, :segment, :shrd,
 :sind, :sinh, :sora, :sund, :takr, :talu, :taml, :tamldec, :telu, :thai, :tibt,
 :tirh, :tnsa, :vaii, :wara, :wcho]

@spec known_rbnf_locale_name(Cldr.Locale.locale_name(), backend()) ::
  String.t() | false

Returns either the RBNF locale_name or false based upon whether the locale name is configured in Cldr and has RBNF rules defined.

Arguments

• locale is any valid locale name returned by Cldr.known_locale_names/1

• backend is any module that includes use Cldr and therefore is a Cldr backend module. The default is Cldr.default_backend!/0. Note that Cldr.default_backend!/0 will raise an exception if no :default_backend is configured under the :ex_cldr key in config.exs.

Examples

iex> Cldr.known_rbnf_locale_name(:en, TestBackend.Cldr)
:en

iex> Cldr.known_rbnf_locale_name(:"en-SA", TestBackend.Cldr)
false

@spec known_rbnf_locale_name?(Cldr.Locale.locale_name(), backend()) :: boolean()

Returns a boolean indicating if the specified locale name is configured and available in Cldr and supports rules based number formats (RBNF).

Arguments

• locale is any valid locale name returned by Cldr.known_locale_names/1

• backend is any module that includes use Cldr and therefore is a Cldr backend module. The default is Cldr.default_backend!/0. Note that Cldr.default_backend!/0 will raise an exception if no :default_backend is configured under the :ex_cldr key in config.exs.

Examples

iex> Cldr.known_rbnf_locale_name?(:en, TestBackend.Cldr)
true

iex> Cldr.known_rbnf_locale_name?(:"!!", TestBackend.Cldr)
false

@spec known_rbnf_locale_names(backend()) :: [Cldr.Locale.locale_name(), ...] | []

Returns a list of locale names which have rules based number formats (RBNF).

Arguments

• backend is any module that includes use Cldr and therefore is a Cldr backend module

@spec known_territories() :: [atom(), ...]

Returns a list of the territories known to Cldr.

The territories codes are defined in UN M.49 which defines both individual territories and enclosing territories. These enclosing territories are defined for statistical purposes and do not relate to political alignment.

For example, the territory :"001" is defined as "the world".

Example

iex> Cldr.known_territories()
[:"001", :"002", :"003", :"005", :"009", :"011", :"013", :"014", :"015", :"017",
 :"018", :"019", :"021", :"029", :"030", :"034", :"035", :"039", :"053", :"054",
 :"057", :"061", :"142", :"143", :"145", :"150", :"151", :"154", :"155", :"202",
 :"419", :AC, :AD, :AE, :AF, :AG, :AI, :AL, :AM, :AO, :AQ, :AR, :AS, :AT, :AU,
 :AW, :AX, :AZ, :BA, :BB, :BD, :BE, :BF, :BG, :BH, :BI, :BJ, :BL, :BM, :BN, :BO,
 :BQ, :BR, :BS, :BT, :BV, :BW, :BY, :BZ, :CA, :CC, :CD, :CF, :CG, :CH, :CI, :CK,
 :CL, :CM, :CN, :CO, :CP, :CQ, :CR, :CU, :CV, :CW, :CX, :CY, :CZ, :DE, :DG, :DJ,
 :DK, :DM, :DO, :DZ, :EA, :EC, :EE, :EG, :EH, :ER, :ES, :ET, :EU, :EZ, :FI, :FJ,
 :FK, :FM, :FO, :FR, :GA, :GB, :GD, :GE, :GF, :GG, :GH, :GI, :GL, :GM, :GN, :GP,
 :GQ, :GR, :GS, :GT, :GU, :GW, :GY, :HK, :HM, :HN, :HR, :HT, :HU, :IC, :ID, :IE,
 :IL, :IM, :IN, :IO, :IQ, :IR, :IS, :IT, :JE, :JM, :JO, :JP, :KE, :KG, :KH, :KI,
 :KM, :KN, :KP, :KR, :KW, :KY, :KZ, :LA, :LB, :LC, :LI, :LK, :LR, :LS, :LT, :LU,
 :LV, :LY, :MA, :MC, :MD, :ME, :MF, :MG, :MH, :MK, :ML, :MM, :MN, :MO, :MP, :MQ,
 :MR, :MS, :MT, :MU, :MV, :MW, :MX, :MY, :MZ, :NA, :NC, :NE, :NF, :NG, :NI, :NL,
 :NO, :NP, :NR, :NU, :NZ, :OM, :PA, :PE, :PF, :PG, :PH, :PK, :PL, :PM, :PN, :PR,
 :PS, :PT, :PW, :PY, :QA, :QO, :RE, :RO, :RS, :RU, :RW, :SA, :SB, :SC, :SD, :SE,
 :SG, :SH, :SI, :SJ, :SK, :SL, :SM, :SN, :SO, :SR, :SS, :ST, :SV, :SX, :SY, :SZ,
 :TA, :TC, :TD, :TF, :TG, :TH, :TJ, :TK, :TL, :TM, :TN, :TO, :TR, :TT, :TV, :TW,
 :TZ, :UA, :UG, :UM, :UN, :US, :UY, :UZ, :VA, :VC, :VE, :VG, :VI, :VN, :VU, :WF,
 :WS, :XK, :YE, :YT, :ZA, :ZM, :ZW]

@spec known_territory_subdivision_containment() :: %{
  required(subdivision_code :: Cldr.Locale.subdivision_code()) =>
    contained_within :: [
      Cldr.Locale.territory_code() | Cldr.Locale.subdivision_code(),
      ...
    ]
}

Returns a map of territory subdivisions sith a list of their parent subdivisions and region.

For a description of territory subdivisions see Cldr.known_territory_subdivisions/0

@spec known_territory_subdivisions() :: %{required(atom()) => list()}

Returns the map of territories and subdivisions and their child subdivsions.

The subdivision codes designate a subdivision of a country or region. They are called various names, such as a state in the United States, or a province in Canada.

The codes in CLDR are based on ISO 3166-2 subdivision codes. The ISO codes have a region code followed by a hyphen, then a suffix consisting of 1..3 ASCII letters or digits.

The CLDR codes are designed to work in a unicode_locale_id (BCP47), and are thus all lowercase, with no hyphen. For example, the following are valid, and mean “English as used in California, USA”.

en-u-sd-usca
en-US-u-sd-usca

CLDR has additional subdivision codes. These may start with a 3-digit region code or use a suffix of 4 ASCII letters or digits, so they will not collide with the ISO codes. Subdivision codes for unknown values are the region code plus "zzzz", such as "uszzzz" for an unknown subdivision of the US. Other codes may be added for stability.

Set the default system-wide backend module.

Arguments

• backend is any module that includes use Cldr and therefore is a Cldr backend module.

Returns

• {:ok, backend} or

• {:error, {exception, reason}}

Set's the system default locale.

The locale set here is the base level system default equivalent to setting the :default_locale key in config.exs.

Arguments

• locale is a Cldr.LanguageTag struct returned by Cldr.Locale.new!/2 with a non-nil :cldr_locale_name.

Returns

• {:ok, locale}

Sets the system default locale.

The locale set here is the base level system default equivalent to setting the :default_locale key in config.exs.

Arguments

• locale is any valid locale name returned by Cldr.known_locale_names/1.

• backend is any module that includes use Cldr and therefore is a Cldr backend module.

Returns

• {:ok, locale} or

• {:error, {exception, reason}}

@spec put_gettext_locale(Cldr.LanguageTag.t()) ::
  {:ok, binary() | nil} | {:error, {module(), String.t()}}

Set the current process's Gettext locale from a t:Cldr.LanguageTag.

Arguments

• locale is a Cldr.LanguageTag struct returned by Cldr.Locale.new!/2.

Returns

• {:ok, gettext_locale_name} or

• {:error, {exception, reason}}

Behaviour

1. If the locale.gettext_locale_name is nil then an error is returned.

2. The gettext locale for the gettext_backend configured for the CLDR backend defined by the t:Cldr.LanguageTag is set.

Examples

iex> import Cldr.LanguageTag.Sigil
iex> Cldr.put_gettext_locale(~l"en")
{:ok, "en"}

iex> import Cldr.LanguageTag.Sigil
iex> Cldr.put_gettext_locale(~l"de")
{
  :error,
  {
    Cldr.UnknownLocaleError,
    "Locale TestBackend.Cldr.Locale.new!(\"de-DE\") does not map to a known gettext locale name"
  }
}

@spec put_locale(backend(), Cldr.Locale.locale_reference()) ::
  {:ok, Cldr.LanguageTag.t()} | {:error, {module(), String.t()}}

Set the current process's locale for a specified backend or for all backends.

Arguments

• backend is any module that includes use Cldr and therefore is a Cldr backend module. The default is to set the locale for all backends.

• locale is any valid locale name returned by Cldr.known_locale_names/1 or a Cldr.LanguageTag struct returned by Cldr.Locale.new!/2. It may also be a map that contains the keys "cldr_locale" and "cldr_backend" which is the shape of a Phoenix and Plug session making it easy to set the locale from a session.

Returns

• {:ok, locale}

Behaviour

1. If no backend is provided and the locale is a Cldr.LanguageTag.t then the the locale is set as the default for the current process

Notes

See rfc5646 for the specification of a language tag

Examples

iex> Cldr.put_locale(TestBackend.Cldr, "en")
{:ok,
 %Cldr.LanguageTag{
   backend: TestBackend.Cldr,
   canonical_locale_name: "en",
   cldr_locale_name: :en,
   language_subtags: [],
   extensions: %{},
   gettext_locale_name: "en",
   language: "en",
   locale: %{},
   private_use: [],
   rbnf_locale_name: :en,
   requested_locale_name: "en",
   script: :Latn,
   territory: :US,
   transform: %{},
   language_variants: []
 }}

iex> Cldr.put_locale(TestBackend.Cldr, "invalid-locale!")
{:error, {Cldr.LanguageTag.ParseError,
  "Expected a BCP47 language tag. Could not parse the remaining \"!\" starting at position 15"}}

@spec quote(String.t(), backend(), Keyword.t()) ::
  String.t() | {:error, {module(), String.t()}}

Add locale-specific quotation marks around a string.

Arguments

• string is any valid Elixir string

• backend is any module that includes use Cldr and therefore is a Cldr backend module. The default is Cldr.default_backend!/0. Note that Cldr.default_backend!/0 will raise an exception if no :default_backend is configured under the :ex_cldr key in config.exs.

• options is a keyword list of options

Options

• :locale is any valid locale name returned by Cldr.known_locale_names/1. The default is Cldr.get_locale/0

Examples

iex> Cldr.quote "Quoted String", MyApp.Cldr
"“Quoted String”"

iex> Cldr.quote "Quoted String", MyApp.Cldr, locale: "ja"
"「Quoted String」"

@spec requested_locale_names(backend()) :: [Cldr.Locale.locale_name(), ...] | []

Returns a list of all requested locale names.

Arguments

• backend is any module that includes use Cldr and therefore is a Cldr backend module. The default is Cldr.default_backend!/0. Note that Cldr.default_backend!/0 will raise an exception if no :default_backend is configured under the :ex_cldr key in config.exs.

The list is the combination of configured locales, Gettext locales and the default locale.

See also known_locales/1 and all_locales/0.

Return the territory fallback chain based upon a locales territory (including u extension) and territory containment definitions.

While CLDR also includes subdivisions in the territory chain, this implementation does not consider them.

Arguments

• territory is either a binary or atom territory code or a t:Cldr.LanguageTag

Returns

• {:ok, list} where list is a list of territories in decreasing order of containment (ie larger enclosing areas) or

• {:error, {exception, reason}} indicating an error

Examples

iex> Cldr.territory_chain "US"
{:ok, [:US, :"021", :"019", :"001"]}

iex> Cldr.territory_chain :AU
{:ok, [:AU, :"053", :"009", :"001"]}

iex> {:ok, locale} = Cldr.validate_locale("en-US-u-rg-CAzzzz", MyApp.Cldr)
iex> Cldr.territory_chain locale
{:ok, [:CA, :"021", :"019", :"001"]}

iex> Cldr.territory_chain :"001"
{:ok, [:"001"]}

Return the territory fallback chain based upon a locales territory (including u extension) and territory containment definitions.

While CLDR also includes subdivisions in the territory chain, this implementation does not consider them.

Arguments

• locale is a binary locale name

• backend is any module that includes use Cldr and therefore is a Cldr backend module.

Returns

• {:ok, list} where list is a list of territories in decreasing order of containment (ie larger enclosing areas) or

• {:error, {exception, reason}} indicating an error

Examples

iex> Cldr.territory_chain "en-US-u-rg-CAzzzz", MyApp.Cldr
{:ok, [:CA, :"021", :"019", :"001"]}

@spec territory_containment() :: %{
  EG: [:"001" | :"002" | :"015", ...],
  CV: [:"001" | :"002" | :"011", ...],
  BN: [:"001" | :"142" | :"035", ...],
  GN: [:"001" | :"002" | :"011", ...],
  PS: [:"001" | :"142" | :"145", ...],
  CG: [:"001" | :"002" | :"017", ...],
  TV: [:"001" | :"009" | :"061", ...],
  AE: [:"001" | :"142" | :"145", ...],
  LY: [:"001" | :"002" | :"015", ...],
  ER: [:"001" | :"002" | :"014", ...],
  NC: [:"001" | :"009" | :"054", ...],
  ET: [:"001" | :"002" | :"014", ...],
  IT: [:"001" | :"150" | :"039", ...],
  EE: [:"001" | :"150" | :"154", ...],
  SD: [:"001" | :"002" | :"015", ...],
  ZW: [:"001" | :"002" | :"014", ...],
  CU: [:"001" | :"019" | :"029", ...],
  EA: [:"001" | :"002" | :"015", ...],
  KH: [:"001" | :"142" | :"035", ...],
  GS: [:"001" | :"019" | :"005", ...],
  CD: [:"001" | :"002" | :"017", ...],
  RW: [:"001" | :"002" | :"014", ...],
  KY: [:"001" | :"019" | :"029", ...],
  TA: [:"001" | :"009" | :QO, ...],
  MY: [:"001" | :"142" | :"035", ...],
  BJ: [:"001" | :"002" | :"011", ...],
  GD: [:"001" | :"019" | :"029", ...],
  SS: [:"001" | :"002" | :"014", ...],
  LS: [:"001" | :"002" | :"018", ...],
  UY: [:"001" | :"019" | :"005", ...],
  CX: [:"001" | :"009" | :"053", ...],
  BW: [:"001" | :"002" | :"018", ...],
  BR: [:"001" | :"019" | :"005", ...],
  GW: [:"001" | :"002" | :"011", ...],
  RO: [:"001" | :"150" | :"151", ...],
  TT: [:"001" | :"019" | :"029", ...],
  AX: [:"001" | :"150" | :"154", ...],
  GM: [:"001" | :"002" | :"011", ...],
  FM: [:"001" | :"009" | :"057", ...],
  SY: [:"001" | :"142" | :"145", ...],
  BB: [:"001" | :"019" | :"029", ...],
  JE: [:"001" | :"150" | :"154", ...],
  BD: [:"001" | :"142" | :"034", ...],
  CY: [:"001" | :"142" | :"145", ...],
  CC: [:"001" | :"009" | :"053", ...],
  SI: [:"001" | :"150" | :"039", ...],
  SX: [:"001" | :"019" | :"029", ...],
  JO: [:"001" | :"142" | :"145", ...],
  BA: [:"001" | :"150" | :"039", ...],
  BH: [:"001" | :"142" | :"145", ...],
  WS: [:"001" | :"009" | :"061", ...],
  BS: [:"001" | :"019" | :"029", ...],
  ID: [:"001" | :"142" | :"035", ...],
  QA: [:"001" | :"142" | :"145", ...],
  FR: [:"001" | :"150" | :"155", ...],
  PR: [:"001" | :"019" | :"029", ...],
  GA: [:"001" | :"002" | :"017", ...],
  VU: [:"001" | :"009" | :"054", ...],
  YT: [:"001" | :"002" | :"014", ...],
  MS: [:"001" | :"019" | :"029", ...],
  MH: [:"001" | :"009" | :"057", ...],
  DJ: [:"001" | :"002" | :"014", ...],
  GH: [:"001" | :"002" | :"011", ...],
  DZ: [:"001" | :"002" | :"015", ...],
  GQ: [:"001" | :"002" | :"017", ...],
  UG: [:"001" | :"002" | :"014", ...],
  UZ: [:"001" | :"142" | :"143", ...],
  ZM: [:"001" | :"002" | :"014", ...],
  KG: [:"001" | :"142" | :"143", ...],
  TO: [:"001" | :"009" | :"061", ...],
  KZ: [:"001" | :"142" | :"143", ...],
  KW: [:"001" | :"142" | :"145", ...],
  GI: [:"001" | :"150" | :"039", ...],
  AS: [:"001" | :"009" | :"061", ...],
  UM: [:"001" | :"009" | :"057", ...],
  MC: [:"001" | :"150" | :"155", ...],
  CW: [:"001" | :"019" | :"029", ...],
  NI: [:"001" | :"019" | :"013", ...],
  NA: [:"001" | :"002" | :"018", ...],
  LI: [:"001" | :"150" | :"155", ...],
  CP: [:"001" | :"009" | :QO, ...],
  MO: [:"001" | :"142" | :"030", ...],
  GB: [:"001" | :"150" | :"154", ...],
  RE: [:"001" | :"002" | :"014", ...],
  AF: [:"001" | :"142" | :"034", ...],
  LK: [:"001" | :"142" | :"034", ...],
  AD: [:"001" | :"150" | :"039", ...],
  ML: [:"001" | :"002" | :"011", ...],
  SZ: [:"001" | :"002" | :"018", ...],
  KI: [:"001" | :"009" | :"057", ...],
  CO: [:"001" | :"019" | :"005", ...],
  BV: [:"001" | :"019" | :"005", ...],
  CN: [:"001" | :"142" | :"030", ...],
  SC: [:"001" | :"002" | :"014", ...],
  ES: [:"001" | :"150" | :"039", ...],
  AL: [:"001" | :"150" | :"039", ...],
  GE: [:"001" | :"142" | :"145", ...],
  LV: [:"001" | :"150" | :"154", ...],
  NE: [:"001" | :"002" | :"011", ...],
  GL: [:"001" | :"019" | :"021", ...],
  TW: [:"001" | :"142" | :"030", ...],
  EH: [:"001" | :"002" | :"015", ...],
  SJ: [:"001" | :"150" | :"154", ...],
  IL: [:"001" | :"142" | :"145", ...],
  CR: [:"001" | :"019" | :"013", ...],
  BM: [:"001" | :"019" | :"021", ...],
  LU: [:"001" | :"150" | :"155", ...],
  DK: [:"001" | :"150" | :"154", ...],
  TH: [:"001" | :"142" | :"035", ...],
  KP: [:"001" | :"142" | :"030", ...],
  NZ: [:"001" | :"009" | :"053", ...],
  JP: [:"001" | :"142" | :"030", ...],
  BF: [:"001" | :"002" | :"011", ...],
  VE: [:"001" | :"019" | :"005", ...],
  SG: [:"001" | :"142" | :"035", ...],
  TN: [:"001" | :"002" | :"015", ...],
  TG: [:"001" | :"002" | :"011", ...],
  CQ: [:"001" | :"150" | :"154", ...],
  HK: [:"001" | :"142" | :"030", ...],
  MR: [:"001" | :"002" | :"011", ...],
  UA: [:"001" | :"150" | :"151", ...],
  PE: [:"001" | :"019" | :"005", ...],
  VN: [:"001" | :"142" | :"035", ...],
  AZ: [:"001" | :"142" | :"145", ...],
  FK: [:"001" | :"019" | :"005", ...],
  DE: [:"001" | :"150" | :"155", ...],
  CZ: [:"001" | :"150" | :"151", ...],
  VC: [:"001" | :"019" | :"029", ...],
  CA: [:"001" | :"019" | :"021", ...],
  NL: [:"001" | :"150" | :"155", ...],
  BQ: [:"001" | :"019" | :"029", ...],
  PH: [:"001" | :"142" | :"035", ...],
  BE: [:"001" | :"150" | :"155", ...],
  GP: [:"001" | :"019" | :"029", ...],
  CF: [:"001" | :"002" | :"017", ...],
  FO: [:"001" | :"150" | :"154", ...],
  WF: [:"001" | :"009" | :"061", ...],
  IR: [:"001" | :"142" | :"034", ...],
  PT: [:"001" | :"150" | :"039", ...],
  AO: [:"001" | :"002" | :"017", ...],
  HT: [:"001" | :"019" | :"029", ...],
  US: [:"001" | :"019" | :"021", ...],
  NF: [:"001" | :"009" | :"053", ...],
  SV: [:"001" | :"019" | :"013", ...],
  GR: [:"001" | :"150" | :"039", ...],
  PL: [:"001" | :"150" | :"151", ...],
  TL: [:"001" | :"142" | :"035", ...],
  BT: [:"001" | :"142" | :"034", ...],
  AI: [:"001" | :"019" | :"029", ...],
  HR: [:"001" | :"150" | :"039", ...],
  LA: [:"001" | :"142" | :"035", ...],
  SO: [:"001" | :"002" | :"014", ...],
  SA: [:"001" | :"142" | :"145", ...],
  TZ: [:"001" | :"002" | :"014", ...],
  AU: [:"001" | :"009" | :"053", ...],
  KN: [:"001" | :"019" | :"029", ...],
  LT: [:"001" | :"150" | :"154", ...],
  BL: [:"001" | :"019" | :"029", ...],
  GY: [:"001" | :"019" | :"005", ...],
  MN: [:"001" | :"142" | :"030", ...],
  TD: [:"001" | :"002" | :"017", ...],
  AT: [:"001" | :"150" | :"155", ...],
  SH: [:"001" | :"002" | :"011", ...],
  IQ: [:"001" | :"142" | :"145", ...],
  PM: [:"001" | :"019" | :"021", ...],
  SM: [:"001" | :"150" | :"039", ...],
  HN: [:"001" | :"019" | :"013", ...],
  AC: [:"001" | :"009" | :QO, ...],
  VI: [:"001" | :"019" | :"029", ...],
  MU: [:"001" | :"002" | :"014", ...],
  MM: [:"001" | :"142" | :"035", ...],
  IC: [:"001" | :"002" | :"015", ...],
  MD: [:"001" | :"150" | :"151", ...],
  NP: [:"001" | :"142" | :"034", ...],
  NR: [:"001" | :"009" | :"057", ...],
  ME: [:"001" | :"150" | :"039", ...],
  GG: [:"001" | :"150" | :"154", ...],
  AG: [:"001" | :"019" | :"029", ...],
  GF: [:"001" | :"019" | :"005", ...],
  TR: [:"001" | :"142" | :"145", ...],
  SK: [:"001" | :"150" | :"151", ...],
  BZ: [:"001" | :"019" | :"013", ...],
  MV: [:"001" | :"142" | :"034", ...],
  DO: [:"001" | :"019" | :"029", ...],
  PK: [:"001" | :"142" | :"034", ...],
  AM: [:"001" | :"142" | :"145", ...],
  PG: [:"001" | :"009" | :"054", ...],
  OM: [:"001" | :"142" | :"145", ...],
  GU: [:"001" | :"009" | :"057", ...],
  MF: [:"001" | :"019" | :"029", ...],
  AW: [:"001" | :"019" | :"029", ...],
  ST: [:"001" | :"002" | :"017", ...],
  SR: [:"001" | :"019" | :"005", ...],
  SE: [:"001" | :"150" | :"154", ...],
  NG: [:"001" | :"002" | :"011", ...],
  LR: [:"001" | :"002" | :"011", ...],
  IE: [:"001" | :"150" | :"154", ...],
  RS: [:"001" | :"150" | :"039", ...],
  VG: [:"001" | :"019" | :"029", ...],
  FI: [:"001" | :"150" | :"154", ...],
  CK: [:"001" | :"009" | :"061", ...],
  MG: [:"001" | :"002" | :"014", ...],
  TC: [:"001" | :"019" | :"029", ...],
  PF: [:"001" | :"009" | :"061", ...],
  KR: [:"001" | :"142" | :"030", ...],
  BG: [:"001" | :"150" | :"151", ...],
  JM: [:"001" | :"019" | :"029", ...],
  BO: [:"001" | :"019" | :"005", ...],
  AR: [:"001" | :"019" | :"005", ...],
  VA: [:"001" | :"150" | :"039", ...],
  TK: [:"001" | :"009" | :"061", ...],
  CH: [:"001" | :"150" | :"155", ...],
  TF: [:"001" | :"002" | :"014", ...],
  LB: [:"001" | :"142" | :"145", ...],
  SB: [:"001" | :"009" | :"054", ...],
  MZ: [:"001" | :"002" | :"014", ...],
  MQ: [:"001" | :"019" | :"029", ...],
  PN: [:"001" | :"009" | :"061", ...],
  IM: [:"001" | :"150" | :"154", ...],
  IN: [:"001" | :"142" | :"034", ...],
  CI: [:"001" | :"002" | :"011", ...],
  BY: [:"001" | :"150" | :"151", ...],
  SN: [:"001" | :"002" | :"011", ...],
  MP: [:"001" | :"009" | :"057", ...],
  DM: [:"001" | :"019" | :"029", ...],
  PW: [:"001" | :"009" | :"057", ...],
  XK: [:"001" | :"150" | :"039", ...],
  EC: [:"001" | :"019" | :"005", ...],
  YE: [:"001" | :"142" | :"145", ...],
  MA: [:"001" | :"002" | :"015", ...],
  FJ: [:"001" | :"009" | :"054", ...],
  KM: [:"001" | :"002" | :"014", ...],
  TJ: [:"001" | :"142" | :"143", ...],
  GT: [:"001" | :"019" | :"013", ...],
  TM: [:"001" | :"142" | :"143", ...],
  CL: [:"001" | :"019" | :"005", ...],
  MK: [:"001" | :"150" | :"039", ...],
  SL: [:"001" | :"002" | :"011", ...],
  MX: [:"001" | :"019" | :"013", ...],
  ZA: [:"001" | :"002" | :"018", ...],
  NU: [:"001" | :"009" | :"061", ...],
  IO: [:"001" | :"002" | :"014", ...],
  KE: [:"001" | :"002" | :"014", ...],
  BI: [:"001" | :"002" | :"014", ...],
  AQ: [:"001" | :"009" | :QO, ...],
  HM: [:"001" | :"009" | :"053", ...],
  RU: [:"001" | :"150" | :"151", ...],
  NO: [:"001" | :"150" | :"154", ...],
  DG: [:"001" | :"009" | :QO, ...],
  PA: [:"001" | :"019" | :"013", ...],
  CM: [:"001" | :"002" | :"017", ...],
  PY: [:"001" | :"019" | :"005", ...],
  MW: [:"001" | :"002" | :"014", ...],
  LC: [:"001" | :"019" | :"029", ...],
  HU: [:"001" | :"150" | :"151", ...],
  MT: [:"001" | :"150" | :"039", ...],
  IS: [:"001" | :"150" | :"154", ...]
}

Returns a map of territories and the territories within which they are contained.

Returns the territory for the world

This is the outermost containment of territories in CLDR.

CLDR does not yet consider non-terrestrial territories.

@spec to_string(term()) :: String.t()

Return a localsed string for types that implement the Cldr.Chars protocol.

The Cldr.Chars protocol is implemented in this library for t:Cldr.LanguageTag.t().

Other CLDR-related libraries implement the protocol for the types they support such as Float, Integer, Decimal, Money, Unit and List.

Returns an error tuple for an invalid calendar.

Arguments

• calendar is any calendar name not returned by Cldr.known_calendars/0

Returns

• {:error, {Cldr.UnknownCalendarError, message}}

Examples

iex> Cldr.unknown_calendar_error("invalid")
{Cldr.UnknownCalendarError, "The calendar name \"invalid\" is invalid"}

Returns an error tuple for an invalid currency.

Arguments

• currency is any currency code not returned by Cldr.known_currencies/0

Returns

• {:error, {Cldr.UnknownCurrencyError, message}}

Examples

iex> Cldr.unknown_currency_error("invalid")
{Cldr.UnknownCurrencyError, "The currency \"invalid\" is invalid"}

@spec unknown_locale_names(backend()) :: [Cldr.Locale.locale_name(), ...] | []

Returns a list of the locales names that are configured, but not known in CLDR.

Arguments

• backend is any module that includes use Cldr and therefore is a Cldr backend module. The default is Cldr.default_backend!/0. Note that Cldr.default_backend!/0 will raise an exception if no :default_backend is configured under the :ex_cldr key in config.exs.

Since there is a compile-time exception raise if there are any unknown locales this function should always return an empty list.

@spec unknown_number_system_error(any()) ::
  {Cldr.UnknownNumberSystemError, String.t()}

Returns an error tuple for an unknown number system.

Arguments

• number_system is any number system name not returned by Cldr.known_number_systems/0

Returns

• {:error, {Cldr.UnknownNumberSystemError, message}}

Examples

iex> Cldr.unknown_number_system_error "invalid"
{Cldr.UnknownNumberSystemError, "The number system \"invalid\" is invalid"}

iex> Cldr.unknown_number_system_error :invalid
{Cldr.UnknownNumberSystemError, "The number system :invalid is unknown"}

@spec unknown_number_system_type_error(any()) ::
  {Cldr.UnknownNumberSystemTypeError, String.t()}

Returns an error tuple for an unknown number system type.

Options

• number_system_type is any number system type name not returned by Cldr.known_number_system_types/1

Returns

• {:error, {Cldr.UnknownNumberSystemTypeError, message}}

Examples

iex> Cldr.unknown_number_system_type_error("invalid")
{Cldr.UnknownNumberSystemTypeError, "The number system type \"invalid\" is invalid"}

iex> Cldr.unknown_number_system_type_error(:invalid)
{Cldr.UnknownNumberSystemTypeError, "The number system type :invalid is unknown"}

@spec unknown_plural_type_error(any()) :: {Cldr.UnknownPluralTypeError, String.t()}

Returns an error tuple for an unknown plural type.

Options

• plural_type is any unknown number system type

Returns

• {:error, {Cldr.UnknownPluralTypeError, message}}

Examples

iex> Cldr.unknown_plural_type_error("invalid")
{Cldr.UnknownPluralTypeError, "The plural type \"invalid\" is invalid"}

iex> Cldr.unknown_plural_type_error(:invalid)
{Cldr.UnknownPluralTypeError, "The plural type :invalid is unknown"}

@spec unknown_script_error(any()) :: {Cldr.InvalidScriptError, String.t()}

Returns an error tuple for an invalid script.

Arguments

• script is any script as a string or an atom

Returns

• {:error, {Cldr.InvalidScriptError, message}}

Examples

iex> Cldr.unknown_script_error "invalid"
{Cldr.InvalidScriptError, "The script \"invalid\" is invalid"}

iex> Cldr.unknown_script_error :invalid
{Cldr.InvalidScriptError, "The script :invalid is invalid"}

@spec unknown_territory_error(any()) :: {Cldr.UnknownTerritoryError, String.t()}

Returns an error tuple for an unknown territory.

Arguments

• territory is any territory code not returned by Cldr.known_territories/0

Returns

• {:error, {Cldr.UnknownTerritoryError, message}}

Examples

iex> Cldr.unknown_territory_error("invalid")
{Cldr.UnknownTerritoryError, "The territory \"invalid\" is unknown"}

@spec validate_backend(backend :: atom()) ::
  {:ok, atom()} | {:error, {atom(), String.t()}}

Validates that a module is a CLDR backend module.

Arguments

• backend is any module name that may be a Cldr backend module.

Returns

• {:ok, backend} is the module if a CLDR backend module or

• {:error, {exception, reason}} if the module is unknown or if the module is not a backend module.

Examples

iex> Cldr.validate_backend MyApp.Cldr
{:ok, MyApp.Cldr}

iex> Cldr.validate_backend :something_else
{:error,
 {Cldr.UnknownBackendError,
  "The backend :something_else is not known or not a backend module."}}

@spec validate_calendar(atom() | String.t()) ::
  {:ok, atom()} | {:error, {module(), String.t()}}

Normalise and validate a calendar name.

Arguments

• calendar is any calendar name returned by Cldr.known_calendars/0

Returns

• {:ok, normalized_calendar_name} or

• {:error, {Cldr.UnknownCalendarError, message}}

Examples

iex> Cldr.validate_calendar(:gregorian)
{:ok, :gregorian}

iex> Cldr.validate_calendar(:invalid)
{:error, {Cldr.UnknownCalendarError, "The calendar name :invalid is invalid"}}

Normalize and validate a currency code.

Arguments

• currency is any ISO 4217 currency code as returned by Cldr.known_currencies/0 or any valid private use ISO4217 code which is a three-letter alphabetic code that starts with "X".

Returns

• {:ok, normalized_currency_code} or

• {:error, {Cldr.UnknownCurrencyError, message}}

Examples

iex> Cldr.validate_currency(:USD)
{:ok, :USD}

iex> Cldr.validate_currency("USD")
{:ok, :USD}

iex> Cldr.validate_currency(:XTC)
{:ok, :XTC}

iex> Cldr.validate_currency("xtc")
{:ok, :XTC}

iex> Cldr.validate_currency("invalid")
{:error, {Cldr.UnknownCurrencyError, "The currency \"invalid\" is invalid"}}

iex> Cldr.validate_currency(:invalid)
{:error, {Cldr.UnknownCurrencyError, "The currency :invalid is invalid"}}

@spec validate_gettext_locale(
  Cldr.Locale.locale_name() | Cldr.LanguageTag.t(),
  backend()
) ::
  {:ok, Cldr.LanguageTag.t()} | {:error, {module(), String.t()}}

Normalise and validate a gettext locale name.

Arguments

• locale_name is any valid locale name returned by Cldr.known_locale_names/1 or a Cldr.LanguageTag struct returned by Cldr.Locale.new!/2

• backend is any module that includes use Cldr and therefore is a Cldr backend module. The default is Cldr.default_backend/0. Note that Cldr.default_backend/0 will raise an exception if no :default_backend is configured under the :ex_cldr key in config.exs.

Returns

• {:ok, language_tag}

• {:error, reason}

Examples

@spec validate_locale(Cldr.Locale.locale_reference(), backend()) ::
  {:ok, Cldr.LanguageTag.t()} | {:error, {module(), String.t()}}

Normalise and validate a locale name.

Arguments

• locale is any valid locale name returned by Cldr.known_locale_names/1 or a Cldr.LanguageTag struct returned by Cldr.Locale.new!/2

• backend is any module that includes use Cldr and therefore is a Cldr backend module. The default is Cldr.default_backend!/0. Note that Cldr.default_backend!/0 will raise an exception if no :default_backend is configured under the :ex_cldr key in config.exs.

Returns

• {:ok, language_tag}

• {:error, reason}

Examples

iex> Cldr.validate_locale(:en, TestBackend.Cldr)
{:ok,
%Cldr.LanguageTag{
  backend: TestBackend.Cldr,
  canonical_locale_name: "en",
  cldr_locale_name: :en,
  extensions: %{},
  gettext_locale_name: "en",
  language: "en",
  locale: %{},
  private_use: [],
  rbnf_locale_name: :en,
  requested_locale_name: "en",
  script: :Latn,
  territory: :US,
  transform: %{},
  language_variants: []
}}

iex> Cldr.validate_locale(:af, TestBackend.Cldr)
{:ok,
%Cldr.LanguageTag{
  backend: TestBackend.Cldr,
  canonical_locale_name: "af",
  cldr_locale_name: :af,
  extensions: %{},
  gettext_locale_name: nil,
  language: "af",
  locale: %{},
  private_use: [],
  rbnf_locale_name: :af,
  requested_locale_name: "af",
  script: :Latn,
  territory: :ZA,
  transform: %{},
  language_variants: []
}}

iex> Cldr.validate_locale("zzz", TestBackend.Cldr)
{:error, {Cldr.InvalidLanguageError, "The language \"zzz\" is invalid"}}

@spec validate_locale!(Cldr.Locale.locale_reference(), backend()) ::
  Cldr.LanguageTag.t() | no_return()

Normalise and validate a locale name or raises an exception.

Arguments

• locale is any valid locale name returned by Cldr.known_locale_names/1 or a Cldr.LanguageTag struct returned by Cldr.Locale.new!/2

• backend is any module that includes use Cldr and therefore is a Cldr backend module. The default is Cldr.default_backend!/0. Note that Cldr.default_backend!/0 will raise an exception if no :default_backend is configured under the :ex_cldr key in config.exs.

Returns

• language_tag or

• raises an exception

Examples

iex> Cldr.validate_locale!(:en, TestBackend.Cldr)
%Cldr.LanguageTag{
  backend: TestBackend.Cldr,
  canonical_locale_name: "en",
  cldr_locale_name: :en,
  extensions: %{},
  gettext_locale_name: "en",
  language: "en",
  locale: %{},
  private_use: [],
  rbnf_locale_name: :en,
  requested_locale_name: "en",
  script: :Latn,
  territory: :US,
  transform: %{},
  language_variants: []
}

iex> Cldr.validate_locale!(:af, TestBackend.Cldr)
%Cldr.LanguageTag{
  backend: TestBackend.Cldr,
  canonical_locale_name: "af",
  cldr_locale_name: :af,
  extensions: %{},
  gettext_locale_name: nil,
  language: "af",
  locale: %{},
  private_use: [],
  rbnf_locale_name: :af,
  requested_locale_name: "af",
  script: :Latn,
  territory: :ZA,
  transform: %{},
  language_variants: []
}

iex> Cldr.validate_locale!("zzz", TestBackend.Cldr)
** (Cldr.InvalidLanguageError) The language "zzz" is invalid

Normalise and validate a measurement system type.

Arguments

• measurement_system is a known measurement system.

Returns

• {:ok, normalized_measurement_system} or

• {:error, {exception, message}}

Examples

iex> Cldr.validate_measurement_system :metric
{:ok, :metric}

iex> Cldr.validate_measurement_system "ussystem"
{:ok, :ussystem}

iex> Cldr.validate_measurement_system "uksystem"
{:ok, :uksystem}

iex> Cldr.validate_measurement_system "something"
{:error, {Cldr.UnknownMeasurementSystemError,
 "The measurement system \"something\" is invalid"}}

@spec validate_number_system(atom() | String.t()) ::
  {:ok, atom()} | {:error, {module(), String.t()}}

Normalize and validate a number system name.

Arguments

• number_system is any number system name returned by Cldr.known_number_systems/0

Returns

• {:ok, normalized_number_system_name} or

• {:error, {exception, message}}

Examples

iex> Cldr.validate_number_system :latn
{:ok, :latn}

iex> Cldr.validate_number_system :arab
{:ok, :arab}

iex> Cldr.validate_number_system "invalid"
{
  :error,
  {Cldr.UnknownNumberSystemError, "The number system :invalid is unknown"}
}

@spec validate_number_system_type(String.t() | atom(), backend()) ::
  {:ok, atom()} | {:error, {module(), String.t()}}

Normalise and validate a number system type.

Arguments

• number_system_type is any number system type returned by Cldr.known_number_system_types/1

• backend is any module that includes use Cldr and therefore is a Cldr backend module. The default is Cldr.default_backend/0. Note that Cldr.default_backend/0 will raise an exception if no :default_backend is configured under the :ex_cldr key in config.exs.

Returns

• {:ok, normalized_number_system_type} or

• {:error, {exception, message}}

Examples

iex> Cldr.validate_number_system_type(:default, TestBackend.Cldr)
{:ok, :default}

iex> Cldr.validate_number_system_type(:traditional, TestBackend.Cldr)
{:ok, :traditional}

iex> Cldr.validate_number_system_type(:latn, TestBackend.Cldr)
{
  :error,
  {Cldr.UnknownNumberSystemTypeError, "The number system type :latn is unknown"}
}

@spec validate_plural_type(atom() | String.t()) ::
  {:ok, Cldr.Number.PluralRule.plural_type()} | {:error, {module(), String.t()}}

Normalize and validate a plural type.

Arguments

• plural_type is any plural type returned by Cldr.Number.PluralRule.known_plural_types/0

Returns

• {:ok, normalized_plural_type} or

• {:error, {exception, message}}

Examples

iex> Cldr.validate_plural_type :few
{:ok, :few}

iex> Cldr.validate_plural_type "one"
{:ok, :one}

iex> Cldr.validate_plural_type "invalid"
{
  :error,
  {Cldr.UnknownPluralTypeError, "The plural type :invalid is unknown"}
}

@spec validate_script(Cldr.Locale.script() | String.t()) ::
  {:ok, atom()} | {:error, {module(), String.t()}}

Normalise and validate a script code.

Arguments

• script is any script code as a binary or atom

Returns:

• {:ok, normalized_script_code} or

• {:error, {Cldr.UnknownscriptError, message}}

Examples

iex> Cldr.validate_script("thai")
{:ok, :Thai}

iex> Cldr.validate_script("qaai")
{:ok, :Zinh}

iex> Cldr.validate_script(Cldr.Locale.new!("en", TestBackend.Cldr))
{:ok, :Latn}

iex> Cldr.validate_script("aaaa")
{:error, {Cldr.InvalidScriptError, "The script \"aaaa\" is invalid"}}

iex> Cldr.validate_script(%{})
{:error, {Cldr.InvalidScriptError, "The script %{} is invalid"}}

@spec validate_territory(atom() | String.t()) ::
  {:ok, Cldr.Locale.territory_code()} | {:error, {module(), String.t()}}

Normalise and validate a territory code.

Arguments

• territory is any territory code returned by Cldr.known_territories/0

Returns:

• {:ok, normalized_territory_code} or

• {:error, {Cldr.UnknownTerritoryError, message}}

Examples

iex> Cldr.validate_territory("en")
{:error, {Cldr.UnknownTerritoryError, "The territory \"en\" is unknown"}}

iex> Cldr.validate_territory("gb")
{:ok, :GB}

iex> Cldr.validate_territory("001")
{:ok, :"001"}

iex> Cldr.validate_territory(Cldr.Locale.new!("en", TestBackend.Cldr))
{:ok, :US}

iex> Cldr.validate_territory(%{})
{:error, {Cldr.UnknownTerritoryError, "The territory %{} is unknown"}}

Normalise and validate a territory subdivision code.

Arguments

• subdivision is any territory code returned by Cldr.known_territory_subdivisions/0

Returns:

• {:ok, normalized_subdivision_code} or

• {:error, {Cldr.UnknownTerritoryError, message}}

Examples

@spec version() :: Version.t()

Returns the version of the CLDR repository.

Example

iex> Cldr.version()
Version.parse!("45.0.0")

@spec with_locale(Cldr.Locale.locale_reference(), (-> any())) :: any()

Execute a function with a locale ensuring that the current locale is restored after the function.

Arguments

• locale is any Cldr.LanguageTag.t/0, tyically returned by Cldr.validate_locale/2.

• fun is any 0-arity function or function capture.

Returns

• The value returned by the function fun/0 or

• raises an exception if the current locale cannot be identified.

@spec with_locale(Cldr.Locale.locale_reference(), backend(), (-> any())) :: any()

Execute a function with a locale ensuring that the current locale is restored after the function.

Arguments

• locale is any valid locale name returned by Cldr.known_locale_names/1 or a string locale name.

• backend is any module that includes use Cldr and therefore is a Cldr backend module. The default is Cldr.default_backend!/0.

• fun is any 0-arity function or function capture.

Returns

• The value returned by the function fun/0 or

• {:error, {exception, reason}} if the locale is invalid or

• raises an exception if the current locale cannot be identified.