Yeah I'm with you, this feels like a case for assertions & not a new core featur... | Hacker News

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bjconlan 14 days ago | parent | context | favorite | on: Clojure 1.13 adds support for checked keys

Yeah I'm with you, this feels like a case for assertions & not a new core feature. Perhaps I'm missing something because it was promoted by Michael Fogus and has been ratified by those who would know (Alex I'm assuming). To me it doesn't pass the test of necessity as something needed at the core but at least it feels somewhat ideomatic.

lukaszkorecki 14 days ago [–]

For me it solves a real issue, a lot of the code that I work on looks like this:

  (defn foo [{:keys [a b c] :or {a 1}]
    {:pre [(some? b) (some? c]}
     .....

having `:keys!` will automatically remove the need for `:pre`

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