Add PluralRules FFI APIs and rust_links

ffi/capi/src/pluralrules.rs

@@ -46,6 +46,9 @@ pub mod ffi {
         #[diplomat::rust_link(icu::plurals::PluralRules::try_new_cardinal, FnInStruct)]
         #[diplomat::rust_link(icu::plurals::PluralRules::try_new, FnInStruct, hidden)]
         #[diplomat::rust_link(icu::plurals::PluralRuleType, Enum, hidden)]
+        #[diplomat::rust_link(icu::plurals::PluralRulesOptions, Struct, hidden)]
+        #[diplomat::rust_link(icu::plurals::PluralRulesOptions::default, FnInStruct, hidden)]
+        #[diplomat::rust_link(icu::plurals::PluralRulesOptions::with_type, FnInStruct, hidden)]
         #[diplomat::attr(all(supports = fallible_constructors, supports = named_constructors), named_constructor = "cardinal")]
         #[cfg(feature = "compiled_data")]
         pub fn create_cardinal(locale: &Locale) -> Result<Box<PluralRules>, DataError> {
@@ -129,7 +132,6 @@ pub mod ffi {
                 &fixed_decimal::Decimal::try_from_utf8(s)?,
             ))))
         }
-
         /// Construct from a FixedDecimal
         ///
         /// Retains at most 18 digits each from the integer and fraction parts.
@@ -138,6 +140,15 @@ pub mod ffi {
         pub fn from_fixed_decimal(x: &crate::fixed_decimal::ffi::Decimal) -> Box<Self> {
             Box::new(Self((&x.0).into()))
         }
+
+        #[diplomat::rust_link(icu::plurals::PluralOperands::is_exactly_one, FnInStruct)]
+        pub fn is_exactly_one(&self) -> bool {
+            self.0.is_exactly_one()
+        }
+        #[diplomat::rust_link(icu::plurals::PluralOperands::is_exactly_zero, FnInStruct)]
+        pub fn is_exactly_zero(&self) -> bool {
+            self.0.is_exactly_zero()
+        }
     }
 
     #[diplomat::out]

ffi/capi/tests/missing_apis.txt

@@ -137,28 +137,3 @@ icu::datetime::options::SubsecondDigits#Enum
 icu::datetime::options::SubsecondError#Enum
 icu::datetime::options::TimePrecision#Enum
 icu::datetime::options::YearStyle#Enum
-icu::plurals::PluralElements#Struct
-icu::plurals::PluralElements::as_ref#FnInStruct
-icu::plurals::PluralElements::explicit_one#FnInStruct
-icu::plurals::PluralElements::explicit_zero#FnInStruct
-icu::plurals::PluralElements::few#FnInStruct
-icu::plurals::PluralElements::many#FnInStruct
-icu::plurals::PluralElements::map#FnInStruct
-icu::plurals::PluralElements::new#FnInStruct
-icu::plurals::PluralElements::one#FnInStruct
-icu::plurals::PluralElements::other#FnInStruct
-icu::plurals::PluralElements::try_into_other#FnInStruct
-icu::plurals::PluralElements::two#FnInStruct
-icu::plurals::PluralElements::with_explicit_one_value#FnInStruct
-icu::plurals::PluralElements::with_explicit_zero_value#FnInStruct
-icu::plurals::PluralElements::with_few_value#FnInStruct
-icu::plurals::PluralElements::with_many_value#FnInStruct
-icu::plurals::PluralElements::with_one_value#FnInStruct
-icu::plurals::PluralElements::with_two_value#FnInStruct
-icu::plurals::PluralElements::with_zero_value#FnInStruct
-icu::plurals::PluralElements::zero#FnInStruct
-icu::plurals::PluralOperands::is_exactly_one#FnInStruct
-icu::plurals::PluralOperands::is_exactly_zero#FnInStruct
-icu::plurals::PluralRulesOptions#Struct
-icu::plurals::PluralRulesOptions::default#FnInStruct
-icu::plurals::PluralRulesOptions::with_type#FnInStruct

tools/make/diplomat-coverage/src/allowlist.rs

@@ -344,6 +344,9 @@ lazy_static::lazy_static! {
         "icu::calendar::Date::wrap_calendar_in_arc",
         "icu::calendar::Date::wrap_calendar_in_ref",
 
+        // Utility for use by other ICU4X crates
+        "icu::plurals::PluralElements",
+
         // Individual markerlike calendar types and inner types
         // inner types are only public for associated type reasons, and the markerlike
         // calendar types exist to implement the trait