granit-parser 1.0.1

A YAML parser with comment and style support, written in pure Rust
Documentation 
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use granit_parser::{ErrorKind, Event, EventReceiver, Parser, ScanError};

struct Collector(Vec<Event<'static>>);
impl EventReceiver<'static> for Collector {
    fn on_event(&mut self, ev: Event<'static>) {
        self.0.push(ev);
    }
}

#[test]
fn test_unclosed_flow_sequence_at_eof() {
    let input = "  [";
    let mut parser = Parser::new_from_str(input);
    let mut collector = Collector(Vec::new());
    let res = parser.load(&mut collector, false);

    println!("Events: {:?}", collector.0);
    println!("Result: {res:?}");
    assert!(res.is_err());
    let err = res.unwrap_err();
    assert_eq!(err.info(), "unclosed bracket '['");
    assert_eq!(err.marker().index(), 2);
}

#[test]
fn test_unclosed_flow_mapping_at_eof() {
    let input = "   {";
    let mut parser = Parser::new_from_str(input);
    let mut collector = Collector(Vec::new());
    let res = parser.load(&mut collector, false);

    println!("Events: {:?}", collector.0);
    println!("Result: {res:?}");
    assert!(res.is_err());
    let err = res.unwrap_err();
    assert_eq!(err.info(), "unclosed bracket '{'");
    assert_eq!(err.marker().index(), 3);
}

#[test]
fn test_unclosed_implicit_flow_mapping_at_eof() {
    let input = " [ a:";
    let mut parser = Parser::new_from_str(input);
    let mut collector = Collector(Vec::new());
    let res = parser.load(&mut collector, false);

    println!("Events: {:?}", collector.0);
    println!("Result: {res:?}");
    assert!(res.is_err());
    let err = res.unwrap_err();
    assert_eq!(err.info(), "unclosed bracket '['");
    assert_eq!(err.marker().index(), 1);
}

#[test]
fn test_unclosed_quoted_scalar_at_eof() {
    let input = "     \"abc";
    let mut parser = Parser::new_from_str(input);
    let mut collector = Collector(Vec::new());
    let res = parser.load(&mut collector, false);

    println!("Events: {:?}", collector.0);
    println!("Result: {res:?}");
    assert!(res.is_err());
    let err = res.unwrap_err();
    assert_eq!(err.info(), "unclosed quote");
    assert_eq!(err.marker().index(), 5);
}

fn first_error(input: &str) -> ScanError {
    Parser::new_from_str(input)
        .find_map(Result::err)
        .expect("input should fail")
}

#[test]
fn mismatched_sequence_closed_by_mapping_brace_reports_mismatch() {
    let error = first_error("[}");

    assert_eq!(
        error.kind(),
        &ErrorKind::MismatchedFlowCollectionEnd {
            open: '[',
            close: '}',
        }
    );
    assert_eq!(error.info(), "mismatched bracket '[' closed by '}'");
    assert_eq!(error.marker().index(), 0);
}

#[test]
fn mismatched_mapping_closed_by_sequence_bracket_reports_mismatch() {
    let error = first_error("{]");

    assert_eq!(
        error.kind(),
        &ErrorKind::MismatchedFlowCollectionEnd {
            open: '{',
            close: ']',
        }
    );
    assert_eq!(error.info(), "mismatched bracket '{' closed by ']'");
    assert_eq!(error.marker().index(), 0);
}