Function expect_token

graphlite/src/ast/parser.rs:3450–3468

Expect a specific token

(expected: Token)

/// Expect a specific token
fn expect_token(expected: Token) -> impl Fn(&[Token]) -> IResult<&[Token], Token> {
    move |tokens: &[Token]| {
        if let Some(token) = tokens.first() {
            if std::mem::discriminant(token) == std::mem::discriminant(&expected) {
                Ok((&tokens[1..], token.clone()))
            } else {
                Err(nom::Err::Error(nom::error::Error::new(
                    tokens,
                    nom::error::ErrorKind::Tag,
                )))
            }
        } else {
            Err(nom::Err::Error(nom::error::Error::new(
                tokens,
                nom::error::ErrorKind::Tag,
            )))
        }
    }
}

// Helper function for tag_token (alias for expect_token for compatibility)
fn tag_token(expected: Token) -> impl Fn(&[Token]) -> IResult<&[Token], Token> {