pub fn parse_left_right(
    node: &str,
    mut convert: Convert,
    ignored: &mut Vec<Range>,
) -> Result<(Range, Expr, Expr), ()> {
    let start = convert;
    let start_range = convert.start_node(node)?;
    convert.update(start_range);

    let mut left: Option<Expr> = None;
    let mut right: Option<Expr> = None;
    loop {
        if let Ok(range) = convert.end_node(node) {
            convert.update(range);
            break;
        } else if let Ok((range, v)) = parse_expr("left", convert, ignored) {
            convert.update(range);
            left = Some(v);
        } else if let Ok((range, v)) = parse_expr("right", convert, ignored) {
            convert.update(range);
            right = Some(v);
        } else {
            let range = convert.ignore();
            convert.update(range);
            ignored.push(range);
        }
    }

    let left = left.ok_or(())?;
    let right = right.ok_or(())?;
    Ok((convert.subtract(start), left, right))
}
/// Parses a left/right expression.
Parses a left/right expression.
Parses a left / right expression .
pub fn parse_left_right(
    node: &str,
    mut convert: Convert,
    ignored: &mut Vec<Range>,
) -> Result<(Range, Expr, Expr), ()> {
    let start = convert;
    let start_range = convert.start_node(node)?;
    convert.update(start_range);
    let mut left: Option<Expr> = None;
    let mut right: Option<Expr> = None;
    loop {
        if let Ok(range) = convert.end_node(node) {
            convert.update(range);
            break;
        } else if let Ok((range, v)) = parse_expr("left", convert, ignored) {
            convert.update(range);
            left = Some(v);
        } else if let Ok((range, v)) = parse_expr("right", convert, ignored) {
            convert.update(range);
            right = Some(v);
        } else {
            let range = convert.ignore();
            convert.update(range);
            ignored.push(range);
        }
    }
    let left = left.ok_or(())?;
    let right = right.ok_or(())?;
    Ok((convert.subtract(start), left, right))
}
pub fn parse_left_right ( node : & str , mut convert : Convert , ignored : & mut Vec < Range > , ) -> Result < ( Range , Expr , Expr ) , ( ) > { let start = convert ; let start_range = convert . start_node ( node ) ? ; convert . update ( start_range ) ; let mut left : Option < Expr > = None ; let mut right : Option < Expr > = None ; loop { if let Ok ( range ) = convert . end_node ( node ) { convert . update ( range ) ; break ; } else if let Ok ( ( range , v ) ) = parse_expr ( " " , convert , ignored ) { convert . update ( range ) ; left = Some ( v ) ; } else if let Ok ( ( range , v ) ) = parse_expr ( " " , convert , ignored ) { convert . update ( range ) ; right = Some ( v ) ; } else { let range = convert . ignore ( ) ; convert . update ( range ) ; ignored . push ( range ) ; } } let left = left . ok_or ( ( ) ) ? ; let right = right . ok_or ( ( ) ) ? ; Ok ( ( convert . subtract ( start ) , left , right ) ) }
Parses a left/right expression.
Parses a left / right expression .
node
&str
convert
Convert
ignored
&mut Vec<Range>
node
&str
convert
Convert
ignored
&mut Vec<Range>