Function final_mutation

graphlite/src/ast/parser.rs:639–673

Parse final mutation action

(tokens: &[Token])

/// Parse final mutation action
fn final_mutation(tokens: &[Token]) -> IResult<&[Token], FinalMutation> {
    alt((
        // REMOVE items
        map(
            preceded(
                expect_token(Token::Remove),
                separated_list1(expect_token(Token::Comma), remove_item),
            ),
            FinalMutation::Remove,
        ),
        // SET items
        map(
            preceded(
                expect_token(Token::Set),
                separated_list1(expect_token(Token::Comma), set_item),
            ),
            FinalMutation::Set,
        ),
        // DELETE expressions
        map(
            tuple((
                opt(alt((
                    expect_token(Token::Detach),
                    expect_token(Token::NoDetach),
                ))),
                expect_token(Token::Delete),
                separated_list1(expect_token(Token::Comma), expression),
            )),
            |(detach_mode, _, expressions)| FinalMutation::Delete {
                expressions,
                detach: matches!(detach_mode, Some(Token::Detach)),
            },
        ),
    ))(tokens)
}

/// Parse mutation pipeline: MATCH ... WITH ... [UNWIND ... [WHERE ...]] REMOVE/SET/DELETE ...
fn mutation_pipeline(tokens: &[Token]) -> IResult<&[Token], Query> {