Struct Features 

pub struct Features { /* private fields */ }

Which functions the built catalogs may use, and which locale data they need.

Implementations

impl Features

pub fn from_env() -> Features

The set cargo passed this build.rs: every CARGO_FEATURE_* in the environment, back in its kebab-case spelling.

Cargo spells a feature some-feature as CARGO_FEATURE_SOME_FEATURE, so a feature whose name already holds _ comes back with -. None of the facade’s features does (plans/00-master-plan.md §5).

pub fn from_vars(vars: impl IntoIterator<Item = (String, String)>) -> Features

Features::from_env over a given environment, for tests.

pub fn parse(list: &str) -> Features

The set a --features argument names: comma- or space-separated, with crate/feature reduced to feature as cargo reads it.

pub fn from_names<S: Into<String>>( names: impl IntoIterator<Item = S>, ) -> Features

A set from names, for tests and mf2 compile.

pub fn for_catalogs(&self) -> Features

Only the [CATALOG_FEATURES] of this set: what mf2 compile --site compares with the i18n crate’s.

pub fn has(&self, name: &str) -> bool

Whether name is on.

pub fn names(&self) -> impl Iterator<Item = &str>

The names, sorted.

pub fn fn_number(&self) -> bool

Number localization: symbols, grouping, numbering systems, and :percent / :currency / :unit.

pub fn fn_datetime(&self) -> bool

The date and time family.

pub fn datetime_icu(&self) -> bool

Dates over ICU4X, from the catalog’s icu.blob.

pub fn datetime_intl(&self) -> bool

Dates over the browser’s Intl.DateTimeFormat.

pub fn intl(&self) -> bool

Numbers, plural selection and dates through the browser’s Intl on the client (D4). The server keeps the Rust path, so a catalog still carries the data unless the build writes a client variant.

pub fn provides(&self, identifier: &str) -> Option<bool>

Whether this build provides the built-in function identifier (an MF2 identifier without its :), or None if it is not a built-in — a custom function, which [functions] in mf2.toml answers for.

pub fn missing_feature(&self, identifier: &str) -> Option<&'static str>

The feature identifier needs and this build does not have.

Trait Implementations

impl Clone for Features

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Features

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Features

fn default() -> Self

Returns the “default value” for a type.

impl Eq for Features

impl PartialEq for Features

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Features