Custom type mapping

[dahlia]

Some types need to be mapped to the existing concrete type e.g.:

enum language = ko | en | ja | zh | ...;
enum country = KR | US | JP | TW | CN | HK | SG | ...;

@python-class("babel.core:Locale")
@python-serializer("Locale(Langage(python_value.language), Country(python_value.territory))")
@python-deserializer("babel.core.Locale.parse(nirum_value.language.value + '_' + nirum_value.territory.value)")
record locale (
    language language,
    country territory,
);

[dahlia]

As annotations are more suitable for common things between target languages, it'd better to be configured in package.toml file, e.g.:

[targets.python.type_maps."i18n.locale"."locale"]
install_requires = ["babel"]
class = "babel.core:Locale"
serializer = """
Locale(Language(__python_value__.language),
       Country(__python_value__.territory))
"""
deserializer = """
babel.core.Locale.parse(
    __nirum_value__.language.value + '_' + __nirum_value__.territory.value
)
"""

// i18n/locale.nrm
record locale (
    language language,
    country territory,
);