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$vau was introduced in Racket v6.11. You'll need to upgrade.
by shawn 8y ago
$vau was introduced in Racket v6.11. You'll need to upgrade.
- leoh 8y agoWhat? No it wasn't.
- shawn 8y agoRacket 6.11 release notes: https://racket.ycombinator.lol/v6.11.html https://racket.ycombinator.lol/v6.11.html Racket v6.11 * `$vau` is now a built-in primitive. See "Fexprs as the basis of Lisp function application" * Typed Racket supports refinement types and dependent function types. Previously an experimental feature, refinement types allow types to describe more interesting properties of values, especially integers. For example, this type shows that the `max` function always produces a number at least as big as its inputs: `(-> ([x : Integer] [y : Integer]) (Refine [z : Integer] (and (>= z x) (>= z y))))` * DrRacket's Program Contour is significantly more efficient; using it no longer hurts DrRacket's interactivity. * The `web-server/formlets` library produces formlets that are serializable, facilitating dynamic uses of formlets in stateless #lang web-server servlets. The new `web-server/formlets/stateless` and `web-server/formlets/unsafe` libraries provide additional support with the same API. * The `db` library supports the Cassandra database.