Struct DynLang 

pub struct DynLang(pub Language);

A dynamically loaded language for ast-grep.

Wraps a tree-sitter Language to implement ast-grep’s Language trait, enabling pattern-based searches with dynamically loaded grammars.

Tuple Fields

0: Language

Implementations

impl DynLang

pub fn new(lang: Language) -> Self

Create a new DynLang from a tree-sitter Language.

pub fn pattern(&self, pattern: &str) -> Result<Pattern, PatternError>

Create a pattern from an ast-grep pattern string.

Trait Implementations

impl Clone for DynLang

fn clone(&self) -> DynLang

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Language for DynLang

fn kind_to_id(&self, kind: &str) -> u16

fn field_to_id(&self, field: &str) -> Option<u16>

fn build_pattern( &self, builder: &PatternBuilder<'_>, ) -> Result<Pattern, PatternError>

fn pre_process_pattern<'q>(&self, query: &'q str) -> Cow<'q, str>

normalize pattern code before matching e.g. remove expression_statement, or prefer parsing {} to object over block

fn meta_var_char(&self) -> char

Configure meta variable special character By default $ is the metavar char, but in PHP it can be #

fn expando_char(&self) -> char

Some language does not accept $ as the leading char for identifiers. We need to change $ to other char at run-time to make parser happy, thus the name expando. By default this is the same as meta_var char so replacement is done at runtime.

fn extract_meta_var(&self, source: &str) -> Option<MetaVariable>

extract MetaVariable from a given source string At runtime we need to use expand_char

fn from_path<P>(_path: P) -> Option<Self>

where P: AsRef<Path>,

Return the file language from path. Return None if the file type is not supported.

impl LanguageExt for DynLang

fn get_ts_language(&self) -> TSLanguage

tree sitter language to parse the source

fn ast_grep<S>(&self, source: S) -> Root<StrDoc<Self>>

where S: AsRef<str>,

Create an AstGrep instance for the language

fn injectable_languages(&self) -> Option<&'static [&'static str]>

fn extract_injections<L>( &self, _root: Node<'_, StrDoc<L>>, ) -> HashMap<String, Vec<Range>>

where L: LanguageExt,

get injected language regions in the root document. e.g. get JavaScripts in HTML it will return a list of tuples of (language, regions). The first item is the embedded region language, e.g. javascript The second item is a list of regions in tree_sitter. also see https://tree-sitter.github.io/tree-sitter/using-parsers#multi-language-documents