MT-8247 W3WRfcLanguage

[kaley-w3w]

W3WRfcLanguage

A lightweight representation of an RFC 5646 language tag used in w3w-swift-core. It models:

• language code (ISO 639; prefer 2-letter when available)
• optional script code (4 letters, Titlecase)
• optional region code (2 letters or 3 digits)

It provides:

• A protocol W3WRfcLanguageProtocol that any type can conform to
• A concrete struct W3WRfcLanguage
• An extension that makes Locale.Language conform to the protocol on iOS 16+/watchOS 9+
• Utilities to build identifiers and parse from strings

Availability

• Locale.Language conformance requires iOS 16+ or watchOS 9+.
• W3WRfcLanguage itself is available on all supported platforms; when running on iOS < 16/watchOS < 9, script extraction from Locale may be unavailable and remain nil.

Types

W3WRfcLanguageProtocol

public protocol W3WRfcLanguageProtocol: Equatable {
  var code: String? { get }        // ISO 639 language code
  var scriptCode: String? { get }  // 4-letter Titlecase script code (e.g. "Latn", "Hans")
  var regionCode: String? { get }  // 2-letter or 3-digit region (e.g. "US", "419")
}