Module simple_locale::codes

Parent to a set of standard code/identifier lookup modules.

These modules are effectively registries of standard code/identifiers and any metadate published as a part of the associated standard(s). For example, Codes for the representation of currencies, or ISO 4217 is based on a spreadsheet published directly by ISO itself with some additional fields added from other publicly accessible sources.

While there is no formal type system or traits for modules exporting codes, there are definitely some patterns all of the current implementations follow.

1. modules typically implement a lookup() function that returns an Option,
2. although where some standards have both alphabetic and numeric identifiers there are lookup_by_alpha() and lookup_by_numeric() instead, .
3. Most will also include a function all_codes() to retrieve a vector of all the known identifiers,
4. or, all_alpha_codes() and all_numeric_codes() as appropriate.

Some standards, specifically language and country, support 2-character and 3-character alphabetic identifiers, a single lookup() function is used to lookup either.

Modules

codeset	Character sets registered with IANA.
country	Codes for the representation of names of countries and their subdivisions.
currency	Codes for the representation of currencies.
language	Codes for the representation of names of languages.
region	Codes for the representation of names of countries and their subdivisions.
script	Codes for the representation of names of scripts