Cldr.Locale.canonical_language_tag-exclamation-mark

You're seeing just the function canonical_language_tag-exclamation-mark, go back to Cldr.Locale module for more information.
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canonical_language_tag!(language_tag, backend, options \\ [])

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Specs

canonical_language_tag!(
  locale_name() | Cldr.LanguageTag.t(),
  Cldr.backend(),
  Keyword.t()
) :: Cldr.LanguageTag.t() | none()

Parses a locale name and returns a Cldr.LanguageTag struct that represents a locale or raises on error.

Arguments

See Cldr.Locale.canonical_language_tag/3 for more information.