Module: Lang::Tag::PATTERN

Defined in:

lib/lang/tag/pattern.rb

Constant Summary

LANGUAGE =

– RFC 5646, sec. 2.2.2: Although the ABNF production ‘extlang’ permits up to three extended language tags in the language tag, extended language subtags MUST NOT include another extended language subtag in their ‘Prefix’. That is, the second and third extended language subtag positions in a language tag are permanently reserved and tags that include those subtags in that position are, and will always remain, invalid. ++

"[a-z]{2,3}(?:-[a-z]{3})?|[a-z]{4,8}"

LOOSE_LANGUAGE =

"[a-z]{2,3}(?:-[a-z]{3}){0,3}|[a-z]{4,8}"

SCRIPT =

"[a-z]{4}"

REGION =

"[a-z]{2}|\\d{3}"

VARIANT =

"[a-z\\d]{5,8}|\\d[a-z\\d]{3}"

VARIANT_SEQUENCE =

"(?:-[a-z\\d]{5,8}|-\\d[a-z\\d]{3})"

SINGLETON =

"[a-wy-z\\d]"

EXTENSION_SEQUENCE =

"(?:-#{SINGLETON}(?:-[a-z\\d]{2,8})+)"

PRIVATEUSE =

"x(?:-[a-z\\d]{1,8})+"