Missing support for plurals

[felixLam]

PO supports plurals officially:
https://www.gnu.org/software/gettext/manual/html_node/Translating-plural-forms.html

We would need to come up with a custom "encoding" for CSV formats.

[norpan]

We have the need for plural forms in a not so distant future. Only po file support is relevant for us so I'm leaving the CVS format out of my comment for now.

Let's take the example from the po documentation and translate into Elm.

module Translation.Main exposing (..)

{-
   "Plural-Forms: nplurals=3; plural=n%10==1 && n%100!=11 ? 0 : n%10>=2 && n"
   "%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2;\n"
-}

nplurals =
    3


plural : Int -> Int
plural n =
    if n % 10 == 1 && n % 100 /= 11 then
        0
    else if n % 10 >= 2 && n % 10 <= 4 && (n % 100 < 10 || n % 100 >= 20) then
        1
    else
        2



{-
   #, c-format
   msgid "One file removed"
   msgid_plural "%d files removed"
   msgstr[0] "%d slika je uklonjena"
   msgstr[1] "%d datoteke uklonjenih"
   msgstr[2] "%d slika uklonjenih"
-}


nFilesRemoved : Int -> String
nFilesRemoved n =
    if plural n == 0 then
        toString n ++ " slika je uklonjena"
    else if plural n == 1 then
        toString n ++ " datoteke uklonjenih"
    else
        toString n ++ " slika uklonjenih"

So, what we need is

• Parser from C expression to Elm expression for plural function
• Parser from Elm expression to C expression for plural function
• Handling of if then else and extra number parameter for translations