Struct LanguageTable 

pub struct LanguageTable { /* private fields */ }

Every language provider in reach, and the questions an app assembly asks of them.

Implementations

impl LanguageTable

pub fn new(providers: Vec<LanguageProvider>) -> Result<Self, String>

A table over providers. A module listed twice keeps its first entry.

Errors

Two different languages both claim to be the default, or two languages claim one extension.

pub fn discover(lib_dir: Option<&Path>) -> Result<Self, String>

The descriptors in reach of this process: modules/<name>/ under lib_dir, beside the running executable, beside the shared engine library, and under LUMEN_LIB_DIR; then the ones the modules linked into this binary registered; then the crates under std/ of the source checkout this crate was built in, when that checkout is still on disk. The first descriptor found for a module is the one read.

Errors

A descriptor does not parse, or the descriptors disagree (see Self::new).

pub fn providers(&self) -> &[LanguageProvider]

Every provider, in the order they were found.

pub fn is_empty(&self) -> bool

Whether no provider is in reach.

pub fn language_of(&self, path: &Path) -> Option<&str>

The language a script file belongs to, read off its extension.

pub fn default_language(&self) -> Option<&str>

The language an inline <script> block is read as.

pub fn extensions(&self) -> Vec<&str>

Every extension a language owns.

pub fn source_provider(&self, language: &str) -> Option<&LanguageProvider>

The provider that runs language from source: the edit loop’s, which can check, compile, and reload a program.

pub fn shipped_provider(&self, language: &str) -> Option<&LanguageProvider>

The provider a shipped app runs language with: the bytecode one when the language has one, the source one otherwise.

Trait Implementations

impl Clone for LanguageTable

fn clone(&self) -> LanguageTable

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LanguageTable

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

Formats the value using the given formatter.

impl Default for LanguageTable

fn default() -> LanguageTable

Returns the “default value” for a type.

impl PartialEq for LanguageTable

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for LanguageTable

impl StructuralPartialEq for LanguageTable