fix: impatient loading order

tree-sitter-c/bindings/rust/lib.rs

@@ -0,0 +1,66 @@
+// -*- coding: utf-8 -*-
+// ------------------------------------------------------------------------------------------------
+// Copyright © 2021, tree-sitter-c authors.
+// See the LICENSE file in this repo for license details.
+// ------------------------------------------------------------------------------------------------
+
+//! This crate provides a C grammar for the [tree-sitter][] parsing library.
+//!
+//! Typically, you will use the [language][language func] function to add this grammar to a
+//! tree-sitter [Parser][], and then use the parser to parse some code:
+//!
+//! ```
+//! use tree_sitter::Parser;
+//!
+//! let code = r#"
+//!     int double(int x) {
+//!         return x * 2;
+//!     }
+//! "#;
+//! let mut parser = Parser::new();
+//! parser.set_language(tree_sitter_c::language()).expect("Error loading C grammar");
+//! let parsed = parser.parse(code, None);
+//! # let parsed = parsed.unwrap();
+//! # let root = parsed.root_node();
+//! # assert!(!root.has_error());
+//! ```
+//!
+//! [Language]: https://docs.rs/tree-sitter/*/tree_sitter/struct.Language.html
+//! [language func]: fn.language.html
+//! [Parser]: https://docs.rs/tree-sitter/*/tree_sitter/struct.Parser.html
+//! [tree-sitter]: https://tree-sitter.github.io/
+
+use tree_sitter::Language;
+
+extern "C" {
+    fn tree_sitter_c() -> Language;
+}
+
+/// Returns the tree-sitter [Language][] for this grammar.
+///
+/// [Language]: https://docs.rs/tree-sitter/*/tree_sitter/struct.Language.html
+pub fn language() -> Language {
+    unsafe { tree_sitter_c() }
+}
+
+/// The source of the C tree-sitter grammar description.
+pub const GRAMMAR: &str = include_str!("../../grammar.js");
+
+/// The syntax highlighting query for this language.
+pub const HIGHLIGHT_QUERY: &str = include_str!("../../queries/highlights.scm");
+
+/// The content of the [`node-types.json`][] file for this grammar.
+///
+/// [`node-types.json`]: https://tree-sitter.github.io/tree-sitter/using-parsers#static-node-types
+pub const NODE_TYPES: &str = include_str!("../../src/node-types.json");
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn can_load_grammar() {
+        let mut parser = tree_sitter::Parser::new();
+        parser
+            .set_language(super::language())
+            .expect("Error loading C grammar");
+    }
+}