Cldr.Gettext.Interpolation.V2 (Cldr Messages v2.0.0)

Gettext interpolation module that supports both ICU MessageFormat v1 and MessageFormat 2 (MF2) messages.

Messages are compiled as V2 first; if the V2 parser fails, the V1 parser is tried as a fallback. At runtime, Cldr.Message.format/3 auto-detects the version. This allows the same .POT files to contain both v1 and v2 messages, all tagged with icu-format.

Defining a Gettext Interpolation Module

# CLDR backend module
defmodule MyApp.Cldr do
  use Cldr,
    locales: ["en", "fr", "ja"],
    default_locale: "en",
    providers: [Cldr.Number, Cldr.Message],
    gettext: MyApp.Gettext
end

# Define an interpolation module that handles both v1 and v2
defmodule MyApp.Gettext.Interpolation do
  use Cldr.Gettext.Interpolation.V2, cldr_backend: MyApp.Cldr
end

# Define a gettext module
defmodule MyApp.Gettext do
  use Gettext, otp_app: :my_app, interpolation: MyApp.Gettext.Interpolation
end

Now you can use Gettext with both message formats:

# V1 message
gettext("{greeting} world!", greeting: "Hello")
#=> "Hello world!"

# V2 message (auto-detected by leading `{{`)
gettext("{{Hello {$name}!}}", %{"name" => "World"})
#=> "Hello World!"