Struct LanguageRegistry 

pub struct LanguageRegistry { /* private fields */ }

Which languages are available, and which files belong to them.

Implementations

impl LanguageRegistry

pub fn new() -> Self

An empty registry.

pub fn register( &mut self, language: Arc<dyn Language>, ) -> Result<(), RegistryError>

Add a language.

Errors

Fails when the identifier or any extension is already claimed, or when an extension is malformed. Rejecting rather than overwriting is deliberate: a registry that silently let the last registration win would make which language parses a .ts file depend on registration order, and that order is not part of any contract.

A failed registration changes nothing — validation of every extension completes before any is claimed.

pub fn by_id(&self, id: &str) -> Option<&Arc<dyn Language>>

Look up a language by its identifier.

pub fn for_path(&self, path: impl AsRef<Path>) -> Option<&Arc<dyn Language>>

Which language, if any, parses this path.

The extension is lowercased before lookup, so a file named Button.TSX is still TSX. Without this, whether a file gets checked would depend on how it was typed.

pub fn languages(&self) -> impl Iterator<Item = &Arc<dyn Language>>

Every registered language, ordered by identifier.

pub fn extensions(&self) -> impl Iterator<Item = &'static str> + '_

Every extension any language claims, ordered.

pub fn len(&self) -> usize

How many languages are registered.

pub fn is_empty(&self) -> bool

Whether no language is registered.

Trait Implementations

impl Clone for LanguageRegistry

fn clone(&self) -> LanguageRegistry

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LanguageRegistry

Hand-written because Arc<dyn Language> is not Debug — trait objects would have to require it, which is a demand on every implementor for the sake of one impl here. The keys are the useful part anyway: what is registered, and what it claims.

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

Formats the value using the given formatter.

impl Default for LanguageRegistry

fn default() -> LanguageRegistry

Returns the “default value” for a type.