Function yield_clause

graphlite/src/ast/parser.rs:1115–1131

Parse YIELD clause: YIELD item1 [AS alias1], item2 [AS alias2], ...

(tokens: &[Token])

/// Parse YIELD clause: YIELD item1 [AS alias1], item2 [AS alias2], ...
fn yield_clause(tokens: &[Token]) -> IResult<&[Token], YieldClause> {
    map(
        tuple((
            expect_token(Token::Yield),
            yield_item,
            many0(tuple((expect_token(Token::Comma), yield_item))),
        )),
        |(_, first_item, additional_items)| {
            let mut items = vec![first_item];
            items.extend(additional_items.into_iter().map(|(_, item)| item));
            YieldClause {
                items,
                location: Location::default(),
            }
        },
    )(tokens)
}

/// Parse YIELD item: column_name [AS alias]
fn yield_item(tokens: &[Token]) -> IResult<&[Token], YieldItem> {