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use crate::*;

// -----------------------------------------------------------------------------

#[tracable_parser]
#[packrat_parser]
pub(crate) fn comment(s: Span) -> IResult<Span, Comment> {
    alt((one_line_comment, block_comment))(s)
}

#[tracable_parser]
#[packrat_parser]
pub(crate) fn one_line_comment(s: Span) -> IResult<Span, Comment> {
    let (s, a) = tag("//")(s)?;
    let (s, b) = opt(is_not("\n"))(s)?;
    let a = if let Some(b) = b {
        concat(a, b).unwrap()
    } else {
        a
    };
    Ok((
        s,
        Comment {
            nodes: (into_locate(a),),
        },
    ))
}

#[tracable_parser]
#[packrat_parser]
pub(crate) fn block_comment(s: Span) -> IResult<Span, Comment> {
    let (s, a) = tag("/*")(s)?;
    let (s, b) = many0(alt((
        is_not("*"),
        terminated(tag("*"), peek(not(tag("/")))),
    )))(s)?;
    let (s, c) = tag("*/")(s)?;
    let mut a = a;
    for b in b {
        a = concat(a, b).unwrap();
    }
    let a = concat(a, c).unwrap();
    Ok((
        s,
        Comment {
            nodes: (into_locate(a),),
        },
    ))
}