type-sitter 0.10.0

generate typed wrappers for tree-sitter grammars from node-types.json and queries
Documentation 
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use type_sitter::{Node, OptionNodeResultExt, Parser, QueryCursor, StreamingIterator, Tree};

mod json {
    use type_sitter::generate_nodes;

    generate_nodes!("../vendor/tree-sitter-json/src/node-types.json");

    pub mod queries {
        use type_sitter::generate_queries;

        generate_queries!(
            "../vendor/tree-sitter-json/queries",
            "../vendor/tree-sitter-json",
            super
        );
    }
}

const JSON_STR: &'static str = "\
{
    \"type\": \"array\",
    \"content\": \"value\"
}";

fn json_tree() -> Tree<json::Document<'static>> {
    let mut parser = Parser::<json::Document>::new(&tree_sitter_json::LANGUAGE.into()).unwrap();
    parser.parse(&JSON_STR, None).unwrap()
}

#[test]
fn test_node_types() {
    let json_tree = json_tree();
    let json_document = json_tree.root_node().unwrap();
    let mut cursor = json_tree.walk();

    assert_eq!(json_document.values(&mut cursor).count(), 1);
    let json_root = json_document
        .values(&mut cursor)
        .next()
        .unwrap2()
        .as_object()
        .unwrap();
    assert_eq!(json_root.pairs(&mut cursor).count(), 2);
    let mut json_fields = json_root.pairs(&mut cursor);
    let json_type = json_fields.next().unwrap2();
    assert_eq!(
        json_type
            .key()
            .unwrap()
            .utf8_text(JSON_STR.as_bytes())
            .unwrap(),
        "\"type\""
    );
    assert_eq!(
        json_type
            .value()
            .unwrap()
            .as_string()
            .unwrap()
            .utf8_text(JSON_STR.as_bytes())
            .unwrap(),
        "\"array\""
    );
    let json_content = json_fields.next().unwrap2();
    assert_eq!(
        json_content
            .key()
            .unwrap()
            .utf8_text(JSON_STR.as_bytes())
            .unwrap(),
        "\"content\""
    );
    assert_eq!(
        json_content
            .value()
            .unwrap()
            .as_string()
            .unwrap()
            .utf8_text(JSON_STR.as_bytes())
            .unwrap(),
        "\"value\""
    );
}

#[test]
fn test_queries() {
    let json_tree = json_tree();
    let json_document = json_tree.root_node().unwrap();

    let mut q = QueryCursor::new();
    let mut matches = q.matches(
        &json::queries::Highlights,
        json_document,
        JSON_STR.as_bytes(),
    );
    let r#match = matches.next().unwrap();
    assert_eq!(
        r#match
            .string_special_key()
            .unwrap()
            .downcast::<json::String>()
            .unwrap()
            .byte_range(),
        6..12
    );
    let r#match = matches.next().unwrap();
    assert_eq!(r#match.string().unwrap().byte_range(), 6..12);
    let r#match = matches.next().unwrap();
    assert_eq!(r#match.string().unwrap().byte_range(), 14..21);
    let r#match = matches.next().unwrap();
    assert_eq!(
        r#match
            .string_special_key()
            .unwrap()
            .downcast::<json::String>()
            .unwrap()
            .byte_range(),
        27..36
    );
    let r#match = matches.next().unwrap();
    assert_eq!(r#match.string().unwrap().byte_range(), 27..36);
    let r#match = matches.next().unwrap();
    assert_eq!(r#match.string().unwrap().byte_range(), 38..45);
    assert!(matches.next().is_none());

    let captures = q
        .captures(
            &json::queries::Highlights,
            json_document,
            JSON_STR.as_bytes(),
        )
        .collect::<Vec<_>>();
    assert_eq!(
        captures[0]
            .as_string_special_key()
            .unwrap()
            .downcast::<json::String>()
            .unwrap()
            .byte_range(),
        6..12
    );
    assert_eq!(captures[1].as_string().unwrap().byte_range(), 6..12);
    assert_eq!(captures[2].as_string().unwrap().byte_range(), 14..21);
    assert_eq!(
        captures[3]
            .as_string_special_key()
            .unwrap()
            .downcast::<json::String>()
            .unwrap()
            .byte_range(),
        27..36
    );
    assert_eq!(captures[4].as_string().unwrap().byte_range(), 27..36);
    assert_eq!(captures[5].as_string().unwrap().byte_range(), 38..45);
    assert_eq!(captures.len(), 6);
}