Function aliased

prqlc/prqlc-parser/src/parser/expr.rs:373–390

(expr: E)

#[allow(dead_code)]
#[cfg(not(coverage))]
fn aliased<'a, I, E>(expr: E) -> impl Parser<'a, I, Expr, ParserError<'a>> + Clone + 'a
where
    I: Input<'a, Token = lr::Token, Span = Span> + BorrowInput<'a>,
    E: Parser<'a, I, Expr, ParserError<'a>> + Clone + 'a,
{
    let aliased = ident_part()
        .then_ignore(ctrl('='))
        .then(expr)
        .map(|(alias, mut expr)| {
            expr.alias = Some(alias);
            expr
        });
    // Because `expr` accounts for parentheses, and aliased is `x=$expr`, we
    // need to allow another layer of parentheses here.
    aliased
        .clone()
        .or(aliased.delimited_by(ctrl('('), ctrl(')')))
}

fn maybe_aliased<'a, I, E>(expr: E) -> impl Parser<'a, I, Expr, ParserError<'a>> + Clone + 'a
where