Struct QueryEngine 

pub struct QueryEngine { /* private fields */ }

Engine for executing tree-sitter queries against parsed Rust source.

Implementations

impl QueryEngine

pub fn new(query_str: &str) -> Result<Self, TreeSitterError>

Create a new query engine from a tree-sitter query string.

Query Syntax

Tree-sitter queries use S-expression syntax:

(function_item
  name: (identifier) @func_name
  body: (block) @body)

Captures are prefixed with @ and can be referenced by name.

pub fn find_all<'a>(&self, parsed: &'a ParsedSource<'a>) -> Vec<QueryMatch>

Execute the query against parsed source and return all matches.

pub fn find_unique<'a>( &self, parsed: &'a ParsedSource<'a>, ) -> Result<QueryMatch, TreeSitterError>

Execute the query and expect exactly one match.

pub fn capture_names(&self) -> &[String]

Get capture names defined in the query.