tree_sitter_java/
lib.rs

1//! This crate provides Java language support for the [tree-sitter] parsing library.
2//!
3//! The parser carries the ABI number of the WillBooster fork (`0x57420001`), so it loads only with the
4//! [`willbooster-tree-sitter`] runtime 2.0.0 or later (depend on it as
5//! `tree-sitter = { package = "willbooster-tree-sitter", version = "2" }`); upstream's `tree-sitter` crate and earlier
6//! versions of the fork's runtime reject it with a `LanguageError`.
7//!
8//! Typically, you will use the [`LANGUAGE`] constant to add this language to a
9//! tree-sitter [`Parser`], and then use the parser to parse some code:
10//!
11//! ```
12//! let code = "class Main {\n    int answer() {\n        return 42;\n    }\n}\n";
13//! let mut parser = tree_sitter::Parser::new();
14//! let language = tree_sitter_java::LANGUAGE;
15//! parser
16//!     .set_language(&language.into())
17//!     .expect("Error loading Java parser");
18//! let tree = parser.parse(code, None).unwrap();
19//! assert!(!tree.root_node().has_error());
20//! ```
21//!
22//! [`Parser`]: https://docs.rs/willbooster-tree-sitter/2/tree_sitter/struct.Parser.html
23//! [tree-sitter]: https://tree-sitter.github.io/
24//! [`willbooster-tree-sitter`]: https://crates.io/crates/willbooster-tree-sitter
25
26use tree_sitter_language::LanguageFn;
27
28unsafe extern "C" {
29    fn tree_sitter_java() -> *const ();
30}
31
32/// The tree-sitter [`LanguageFn`] for this grammar.
33pub const LANGUAGE: LanguageFn = unsafe { LanguageFn::from_raw(tree_sitter_java) };
34
35/// The content of the [`node-types.json`] file for this grammar.
36///
37/// [`node-types.json`]: https://tree-sitter.github.io/tree-sitter/using-parsers/6-static-node-types
38pub const NODE_TYPES: &str = include_str!("../../src/node-types.json");
39
40#[cfg(test)]
41mod tests {
42    #[test]
43    fn test_can_load_grammar() {
44        let mut parser = tree_sitter::Parser::new();
45        parser
46            .set_language(&super::LANGUAGE.into())
47            .expect("Error loading Java parser");
48    }
49}
tree_sitter_java/lib.rs

tree_sitter_java/
lib.rs
