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refactor(locale): simplify pluralForm

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Instead of having a switch-case returning a function to be executed, it's
simpler/faster to have a single function containing a switch-case. It also
allows to group languages with identical plural form in a single
implementation, and remove the "default" guard value, as switch-case already
have a `default:` case.
This commit is contained in:
jvoisin 2025-07-06 00:31:17 +02:00 • committed by Frédéric Guillot
parent 33c648825f
commit dcfe0a7d94
3 changed files with 29 additions and 78 deletions
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98
internal/locale/plural.go
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@ -5,16 +5,9 @@ package locale // import "miniflux.app/v2/internal/locale"
// See https://localization-guide.readthedocs.io/en/latest/l10n/pluralforms.html
// And http://www.unicode.org/cldr/charts/29/supplemental/language_plural_rules.html
var pluralForms = map[string]func(n int) int{
// nplurals=2; plural=(n != 1);
"default": func(n int) int {
if n != 1 {
return 1
}
return 0
},
// nplurals=6; plural=(n==0 ? 0 : n==1 ? 1 : n==2 ? 2 : n%100>=3 && n%100<=10 ? 3 : n%100>=11 ? 4 : 5);
"ar_AR": func(n int) int {
func getPluralForm(lang string, n int) int {
switch lang {
case "ar_AR":
switch {
case n == 0:
return 0
@ -26,90 +19,53 @@ var pluralForms = map[string]func(n int) int{
return 3
case n%100 >= 11:
return 4
default:
return 5
}
return 5
},
// nplurals=3; plural=(n==1) ? 0 : (n>=2 && n<=4) ? 1 : 2;
"cs_CZ": func(n int) int {
case "cs_CZ":
switch {
case n == 1:
return 0
case n >= 2 && n <= 4:
return 1
default:
return 2
}
return 2
},
// nplurals=2; plural=(n > 1);
"fr_FR": func(n int) int {
if n > 1 {
return 1
}
case "id_ID", "ja_JP":
return 0
},
// nplurals=1; plural=0;
"id_ID": func(n int) int {
return 0
},
// nplurals=1; plural=0;
"ja_JP": func(n int) int {
return 0
},
// nplurals=3; plural=(n==1 ? 0 : n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2);
"pl_PL": func(n int) int {
case "pl_PL":
switch {
case n == 1:
return 0
case n%10 >= 2 && n%10 <= 4 && (n%100 < 10 || n%100 >= 20):
return 1
default:
return 2
}
return 2
},
// nplurals=2; plural=(n > 1);
"pt_BR": func(n int) int {
if n > 1 {
return 1
}
return 0
},
// nplurals=3; plural=(n==1 ? 0 : n==0 || (n%100 > 0 && n%100 < 20) ? 1 : 2);
"ro_RO": func(n int) int {
case "ro_RO":
switch {
case n == 1:
return 0
case n == 0 || (n%100 > 0 && n%100 < 20):
return 1
default:
return 2
}
return 2
},
"ru_RU": pluralFormRuSrUa,
// nplurals=2; plural=(n > 1);
"tr_TR": func(n int) int {
case "ru_RU", "uk_UA", "sr_RS":
switch {
case n%10 == 1 && n%100 != 11:
return 0
case n%10 >= 2 && n%10 <= 4 && (n%100 < 10 || n%100 >= 20):
return 1
default:
return 2
}
case "zh_CN", "zh_TW", "nan_Latn_pehoeji":
return 0
default: // includes fr_FR, pr_BR, tr_TR
if n > 1 {
return 1
}
return 0
},
"uk_UA": pluralFormRuSrUa,
"sr_RS": pluralFormRuSrUa,
// nplurals=1; plural=0;
"zh_CN": func(n int) int {
return 0
},
"zh_TW": func(n int) int {
return 0
},
"nan_Latn_pehoeji": func(n int) int {
return 0
},
}
// nplurals=3; plural=(n%10==1 && n%100!=11 ? 0 : n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2);
func pluralFormRuSrUa(n int) int {
switch {
case n%10 == 1 && n%100 != 11:
return 0
case n%10 >= 2 && n%10 <= 4 && (n%100 < 10 || n%100 >= 20):
return 1
}
return 2
}